WL Com Mnl Cover 11 x 17
1/28/05
1:20 PM
Page 1
WL Trip Unit, MODBUS Communication
and Electronic Accessories Application
Guide
powerful ideas
RELIABLE SOLUTIONS
Siemens Energy & Automation, Inc.
3333 Old Milton Parkway
Alpharetta, GA 30005
1-800-964-4114
seainfo@sea.siemens.com
www.sea.siemens.com/power
© 2005 Siemens Energy & Automation, Inc. All Rights Reserved
Siemens is a registered trademark of Siemens AG. Product names mentioned may be trademarks or registered trademarks of their respective companies. Specifications are subject to change without notice.
Order # CBTA-01000-1004 New 5M105CEG Printed in USA
WL Low Voltage Power
Circuit Breaker
ANSI / UL1066 & UL 489
Global network of innovation
WL Com Mnl Cover 11 x 17
1/25/05
10:04 AM
Page 2
Communication-capable Circuit Breakers
Communication-capable Circuit Breakers
WL Circuit Breaker
WL Circuit Breaker
Technological Leader Among Circuit Breakers: WL Communication
Troubleshooting List
Fault Description
Ensure that you are using a fully-assigned null modem cable.
With a null modem cable, pins 2 and 3, 4 and 6, and 7 and 8
must be assigned and reversed with respect to each other.
Connection Diagram
1 Breaker Data Adapter
(BDA)
13
13
An error message appears (e.g. Modem
not initialized, etc.) a PPP connection is
established with the BDA.
2 Browser-capable input
and output device
(e.g. notebook)
4 COM16 MODBUS
module or COM 15
PROFIBUS module
Ensure that the option "Use Java v1.4.0 <applet>" is active
in the browser.
(BSS)
6 Electronic Trip Unit
7 Metering function PLUS
8
9
10
11
12
Delete the cache memory of the browser.
15
14
Nothing happens after you select the language on the first page.
Interlocking (ZSI) module
9 Digital output module
10 Digital output module
4
2
5
1
6
12 Digital input module
13 WinPM.Net on PC
14 PLC (e.g. SIMATIC S7)
Open the Java plug-in operator panel in the Control Panel. Check that
the plug-in is active and Version 1.4.0 is selected under "Extended".
On the "Browser" tab page, the browser that you are using must be
active, and the Java VM cache can be deleted.
Then restart the system.
3
If the problem persists, remove any older versions of Java you
may have.
7
with relay or optocoupler
outputs, remotely
configurable
11 Analog output module
The COM port that you are using on the target system must not be
used by a different application.
In the Control Panel, you also have to set the baud rate for the COM
interface that you are using to 115200.
5 Breaker Status Sensor
with relay or optocoupler
outputs
Before starting the BDA, disconnect the null modem cable from
the BDA and reboot the BDA (DEVICE LED is green). Then reconnect
the cable.
Check the modem and data communications connection settings. You
must choose "555". Only the user name "ppp" works.
3 WL Circuit Breaker
8 Zone Selective
Solution
Check the settings for the gateway, the subnet mask, and the proxy.
Enter the address of the BDA to be addressed in the proxy so that
it is not routed via the proxy. This only works if the BDA is located
in the network specified by the subnet mask.
* The Siemens BDA Plus or meters, 9330, 9350, 95/9600
can be used as a gateway to enable Ethernet communication
to the WL Circuit Breaker.
The 9500 meter can also be used as a central display unit
for multiple WL breakers with metering capability.
You cannot establish a connection to the
BDA Plus via the Ethernet.
15 BDA Plus
Ping the BDA address to check whether TCP/IP communication is
established to the BDA. If the ping does not work, check the network
configuration again with your network administrator. If the BDA replies
to a ping but not to a request to call up the browser, reset the BDA.
The BDA must have already been booted with a connected Ethernet
cable so that the Ethernet interface is activated. To solve the problem,
connect the active Ethernet cable and boot up the BDA.
The system displays a message about
security settings and the BDA pages
stop loading.
The security level of the browser is set to "Secure" and stops Java
applets from running, for example. For this reason, you have to reduce
the security level to a level where the security message no longer
appears and the BDA pages are displayed.
Table 4-3 This troubleshooting list helps you solve any problems you may encounter communicating with the BDA. If you have any other problems,
Technical Assistance at 1-800-964-4114 will be happy to help.
4/26
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 1
Communication-capable
Circuit Breaker
Introduction and Overview
WL Circuit Breaker
MODBUS Profile for WL Circuit Breaker
Breaker Data Adapter (BDA)
Breaker Data Adapter Plus (BDA Plus)
WL MODBUS Communication and Electronic Accessories • January 2005
1
2
3
4
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Page 2
Communication-capable Circuit Breakers
WL Circuit Breaker
Safety Guidelines
This manual contains notices which you should observe to ensure your own personal safety, as well as to
protect the product and connected equipment. These notices are highlighted in the manual by a warning
triangle and are marked as follows according to the level of danger. This equipment contains hazardous
voltages. Death, serious personal injury or property damage can result if safety instructions are not followed.
Only qualified personnel should work on or around this equipment after becoming thoroughly familiar with
all warnings, safety notices, and maintenance procedures contained herein. The successful
and safe operation of this equipment is dependent upon proper handling, installation, operation and
maintenance.
Danger
For the purpose of this manual and product labels, DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
Warning
For the purpose of this manual and product labels, WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
Caution
For the purpose of this manual and product labels, CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate injury.
Attention
Draws your attention to particularly important information on the product, handling the product or to a
particular part of the documentation.
Qualified Personnel
For the purpose of this manual and product labels, a qualified person is one who is familiar with the
installation, construction and operation of the equipment, and the hazards involved. In addition, he or she
has the following qualifications:
(a) Is trained and authorized to energize, de-energize, clear, ground and tag circuits and equipment in
accordance with established safety practices.
(b) Is trained in the proper care and use of protective equipment, such as rubber gloves, hard hat, safety
glasses or face shield, flash clothing, etc., in accordance with established safety practices.
(c) Is trained in rendering first aid.
Correct Usage
Note the following:
Warning
This device and its components may only be used for the applications described in the catalog or
the technical descriptions, and only in connection with devices or components from other
manufacturers which have been approved or recommended by Siemens.
This product can only function correctly and safely if it is transported, stored, set up, and installed
correctly, and operated and maintained as recommended.
Registered Trademarks
WinPM.Net is a registered trademark of Siemens Energy & Automation. MODBUS® is a registered
trademark of MODICON. Some other designations used in these documents are also brands;
the owner's rights may be violated if they are used by third parties for their own purposes.
Excel and Explorer are registered trademarks of Microsoft Corporation. Java is a registered
trademark of Sun Microsystems. Netscape is a registered trademark of AOL Time Warner.
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 3
Introduction and
Overview
Content of the Manual
Overview of the Bus Systems
Communicating with the Circuit Breaker
WL MODBUS Communication and Electronic Accessories • January 2005
1
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Introduction and Overview
WL Circuit Breaker
General
This manual is aimed at those
who want to find out more
about the different applications
of communications-capable
circuit breakers in power
distribution systems.
It contains a detailed guide to
commissioning, operating,
diagnosing and maintaining the
new communications-capable
WL Circuit Breaker.
Content of the Manual
Introduction
Chapter 1 contains a short
introduction to communications in
power distribution systems, and
provides an overview of the benefits
and applications of communicationscapable circuit breakers. The chapter
concludes with a short description of
the most important communication
bus systems.
The demand for communicationscapable systems, data transparency
and flexibility in industrial
automation systems is growing all
the time. Bus systems and intelligent
switchgear are vital to ensure that
industrial power systems can meet
these demands, since industrial
production and building
management are now inconceivable
without communications technology.
Chapter 2 contains a general
description of the WL Circuit Breaker.
It includes information on
configuration data and provides
commissioning instructions.
Chapter 3 explains how the circuit
breakers are integrated in a power
management system and describes
the supported function codes,
register maps and exception codes.
WL is the first circuit breaker that
can be configured, diagnosed and
maintained remotely without the use
of field bus systems and higher-level
operator control and monitoring
systems. These procedures are carried
out using the breaker data adapter
(BDA), a state-of-the-art Internetcapable configuration device for
circuit breakers, which is described in
Chapter 4.
The evermore-stringent requirements
placed on the electrical and
mechanical aspects of circuit
breakers, the growing need for
flexibility and efficiency, and
increasing cost pressure and
automation have contributed to the
recent major innovations in circuit
breaker technology. In power
distribution systems, the WL Circuit
Breaker uses industry-standard bus
systems to transmit key information
for warnings, commissioning and
load shedding to a central control
room. The wide range of applications
ensure that these circuit breakers are
more than just simple switching and
protective devices.
Point-to-point communication, as
well as data entry, transmission,
analysis and visualization are only
possible if the automation and lowvoltage switchgear technology
components can be easily integrated
in a communication solution to
leverage the full range of functions
available.
1/1
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Page 5
Introduction and Overview
WL Circuit Breaker
In this way, status information,
alarms, trip information and
setpoints (e.g. overcurrent, phase
unbalance, overvoltage) increase
transparency in power distribution
systems, enabling these situations
to be dealt with quickly. A
communication host can send
short text messages to the cell
phones of maintenance personnel.
Prompt analysis of this data enables
targeted intervention in the process
and helps reduce system down
time.
WL Circuit Breakers—Modular and
Intelligent
Information for preventive
maintenance (e.g. the number of
operating cycles or hours) enables
timely personnel and material
scheduling, which increases system
availability and helps prevent
sensitive system components from
being damaged.
Cost Saving
Communication helps provide rapid
and targeted information on the
location and cause of power
failures. The cause of the fault can
be determined by recording the
phase currents (e.g. trip as a result
of a short-circuit of 2317 A in phase
L2 on 08/27/2002 at 14:27). This
information can be used to quickly
rectify the fault and reduces
downtime for quicker recovery.
Measuring and communicating
power, power factor and energy
allows an even greater number of
applications. The availibility of
power consumption data on a
targeted basis for business analysis
enables power profiles to be created
and costs to be clearly assigned. In
this way, energy costs can be
allocated and optimized by
balancing the peak loads.
Thousands of options with just a few
components: That's the WL. A new
generation of circuit breakers – from
200A to 5000A – with a modular
design to support every conceivable
application in power distribution
systems – cost effective and flexible,
its communication functionality
enables it to be integrated in
system solutions.
Whatever the configuration, the WL
Circuit Breaker does the job where it
matters. Advantages include simple
retrofitting and a compact design
benefiting everyone who uses WL
Circuit Breakers, whether in
planning, business, or whether they
develop or operate switchgear
systems.
Graphic Saving costs increases
productivity.
1-1
Easy Planning
The WL Circuit Breaker and EasyTCC
together provide a convenient
software package for coordinating
multiple circuit breakers.
Graphic Simplified planning every
step of the way.
1-2
System Solutions
By integrating WL Circuit Breakers in
a higher-level communication
system, they can be configured via
MODBUS, Ethernet or the Internet;
an integrated power management
system allows you to optimize
power distribution across the board.
System solutions - Supports
Graphic energy management through
1-3
advanced metering and
communications.
1/2
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 6
Introduction and Overview
WL Circuit Breaker
Communication Bus Systems
Communication bus systems
are used to connect distribution
devices with varying levels of
intelligence. With their
different structures and
mechanisms, certain bus
systems are designed for highly
specific applications, while
others are better suited for
more open applications. The
following section describes the
most important bus systems
used in automation and power
distribution systems.
MODBUS
MODBUS is an open, serial
communications protocol based on a
master-slave architecture. Since it is
very easy to implement on any kind
of serial interface, it can be used in a
wide range of applications. MODBUS
comprises a master and several
slaves, whereby communication is
controlled exclusively by the master.
MODBUS features two basic
communication mechanisms:
• Question/answer (polling): The
master sends an inquiry to a station
and waits for a response.
• Broadcast: The master sends a
command to all the network
stations, which execute the
command without confirmation.
The data can either be transmitted in
ASCII or as a package in RTU format.
MODBUS can be used over a wide
range of transmission media,
normally, on an RS 485 physical bus,
a twisted, shielded two-wire cable
with terminating resistors.
The MODBUS protocol was originally
developed for networking control
systems, and is often used for
connecting input/output modules to
a central PLC. Due to the low
transmission rate of 38.4 kBaud
max., MODBUS is particularly
recommended for applications with a
low number of stations or low
response time requirements.
The messages enable process data
(input/output data) to be written to
and read from the slaves either
individually or in groups.
1/3
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 7
Introduction and Overview
WL Circuit Breaker
Communication Structure of the
WL Circuit Breakers
Starting at the lowest level with
simple configuration of the circuit
breakers, to the field level with
a PLC and WinPM.Net software
tool, to a connection to the
Intranet/Internet, the potential for
saving on power costs by means of
intelligent power management is
achieveable.
The following diagram:
• Provides an overview of the
different communication options
available with WL Circuit Breakers
and their modules.
• Illustrates the high level of system
flexibility, enabling new and
innovative ideas to be
implemented.
The individual circuit breakers and
their modules are described in the
following chapters.
Connection Diagram
1 Breaker Data Adapter
(BDA)
13
13
2 Browser-capable input
and output device
(e.g. notebook)
3 WL Circuit Breaker
4 COM16 MODBUS
module or COM 15
PROFIBUS module
5 Breaker Status Sensor
(BSS)
6 Electronic Trip Unit
7 Metering function PLUS
8 Zone Selective
8
9
10
11
12
15
14
Interlocking (ZSI) module
9 Digital output module
with relay or optocoupler
outputs
4
2
10 Digital output module
5
1
6
3
7
with relay or optocoupler
outputs, remotely
configurable
12 Digital input module
* The Siemens BDA Plus or meters, 9330, 9350, 95/9600
can be used as a gateway to enable Ethernet communication
to the WL Circuit Breaker.
13 WinPM.Net on PC
The 9500 meter can also be used as a central display unit
for multiple WL breakers with metering capability.
11 Analog output module
14 PLC (e.g. SIMATIC S7)
15 BDA Plus
1/4
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 8
Introduction and Overview
WL Circuit Breaker
Ethernet
The Industrial Ethernet is a highperformance network that conforms
to IEE 802.3 (ETHERNET). The highly
successful 10Mbit/s technology,
which has been used for over a
decade, and the new 100Mbit/s
technology (Fast Ethernet to IEEE
802.3u) in conjunction with
Switching Full Duplex and
Autosensing enable the required
network performance to be adapted
to different requirements. The
appropriate data rates are selected
as required because complete
compatibility enables the
technology to be implemented on
a step-by-step basis.
If the sender detects that its data is
corrupt, another sender must have
already started sending data. In this
case, both senders abort their
respective send operations.
After a random time has elapsed,
the sender restarts the send
operation. This is known as
CSMA/CD and, as a "random" access
procedure, does not guarantee a
response within a certain time
frame. This largely depends on the
bus load, which means that realtime applications cannot yet be
implemented with Ethernet.
Used in 80% of networks, Ethernet
is currently the best of its kind in
LAN environments.
Ethernet does not function
according to a master-slave
principle. All the stations have equal
priority on the bus, which means
that any station can be the sender
or receiver. A sender can only send
on the bus if no other station is
sending at that time. This is due to
the fact that the stations are always
"listening in" to find out whether
any messages are being sent to
them or any senders are currently
active. If a sender has started
sending, it checks that the message
it has sent is not corrupt. If the
message is not changed, the send
operation continues.
1/5
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 1
WL Circuit Breaker
Short description of WL Circuit Breaker
The CubicleBUS
Communication Function of the Trip Units
The COM16 MODBUS Module
Metering and Metering Plus
Description of Important Functions/Parameters
for Communication
External CubicleBUS Modules
External Power Consumption of a WL Circuit Breaker
with CubicleBUS
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 2
Communication-capable Circuit Breakers
WL Circuit Breaker
Introduction and Overview
The demands regarding
communications
capability, data
transparency, flexibility
and integration in power
distribution systems are
increasing all the time.
The WL Circuit Breaker
is a modular circuit
breaker that fulfills the
requirements of the
future today.
Brief Description of the
WL Circuit Breaker
Circuit breakers today are
no longer simply devices
for protecting plants,
transformers, generators
and motors. Many users
now require a complete
overview of the plant from
a central control room and
round-the-clock access to
all available information.
Modern power distribution
systems are characterized
by the methods used to
network circuit breakers—
both with each other and
other components. The
circuit breakers in the
WL Circuit Breaker family
have a lot to offer:
It is possible to carry out
analysis and maintenance
procedures remotely via
the Internet. Operating
staff can be given
immediate access to
information on system
status and alarms. This is
not just a vision of the
future, but reality.
The WL Circuit Breaker
covers the entire range
from 200A to 5000A. The
devices are available with
different interrupting
ratings, allowing shortcircuit currents of up to
200kA to be interrupted
reliably.
WL Circuit Breakers can be
adapted to different system
conditions, which means
that a rating plug can be
used to adapt each circuit
breaker to the appropriate
rated current. This ensures
that optimum protection is
provided, even if changes
have been made in the
system. The modules
(reference Graphic 2-1) can
be replaced without the
need for the transformer
to be changed.
Note: Installation instructions related to the communication modules
described in this section can be found in the individual instruction sheets
and/or Section 9 of the Operator's Manual
PC with WinPM.Net
WL Circuit Breaker configuration
and monitoring software
Graphic 2-1 The system architecture of the WL Circuit Breaker with CubicleBUS enables simultaneous communication via MODBUS
and BDA with a laptop or Ethernet/Intranet/Internet.
2/1
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Page 3
Communication-capable Circuit Breakers
WL Circuit Breaker
The ability to change between two
different parameter sets is also
possible. This function is particularly
useful in the event of a power
failure when an automatic transfer
is made from utility to generator
power, a process which can
involve changing many of the trip
unit parameters.
A wide range of lock-out systems
are available to improve reliability
during critical processes. All
accessories, such as shunt trips,
motor operators and communication
components, can be installed
quickly and easily; this is made
easier because the accessories are
identical across the entire product
line. The commitment to reducing
the overall number of parts results
in fewer spares to be ordered and
lower inventory costs.
The heart of each circuit breaker is
the electronic trip unit (ETU).
Several versions are available to
adapt the protective, metering, and
alarm functions to the system
requirements: from simple overload
and short-circuit protection to trip
units that can be configured
remotely and which feature a wide
range of metering and alarm
functions.
The CubicleBUS
The CubicleBUS, which connects all
the intelligent components within
the WL Circuit Breaker and enables
additional external components to
be connected quickly and reliably,
forms the backbone of the modular
architecture of the WL. The
CubicleBUS is already integrated in
and connected to all assembled
circuit breakers with the ETU745,
ETU748, ETU755, and ETU776
trip units.
The high level of system modularity
enables communication functions
(e.g. metering function) to be
retrofitted at any time. A WL Circuit
Breaker that is not communications
capable can be upgraded (e.g. by
exchanging ETU725 for ETU745
with CubicleBUS) quickly and easily
on site. All CubicleBUS modules can
access the existing data of the
circuit breaker directly, thereby
ensuring rapid access to information
and speedy responses to events.
By connecting additional, external
modules to the CubicleBUS, costeffective solutions for
communicating data from other
devices in the cubicle can be
implemented.
All circuit breakers with ETU745,
ETU748, ETU755 and ETU776
trip units are communications
capable, and allow additional
components to be internally
networked via the CubicleBUS.
Communications Capability of the
Electronic Trip Units (ETUs)
The electronic trip units ETU745,
ETU748, ETU755, and ETU776 are
all communications capable. The
CubicleBUS is connected to the
circuit breaker terminals X8.1(-) to
X8.4(+)
Different versions of
communications-capable trip units
are available.
The front of the ETU745 has rotary
switches for setting protective
parameters. These can be read via
the communication device. The
ETU745 can also be installed with
a four-line display for the measured
values.
The ETU755 does not have rotary
switches or a display. The protective
parameters can only be changed
via communications. This trip unit
with remote-only parameter setting
is for special application demands.
The ETU776 features a graphical
display with a clearly structured,
key-driven menu. This not only
enables operators to display
measured values, status
information, and maintenance
information, but also to read all the
existing parameters and make
password-protected changes.
The circuit breaker is connected to
MODBUS via the RS485 interface
on the COM16 module.
The breaker data adapter (BDA)
(see Chapter 4) also supports
higher-level networking/
communication (Intranet/Internet).
2/2
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Page 4
Communication-capable Circuit Breakers
WL Circuit Breaker
Functional overview of the trip unit system
Basic Functions
Long-time overcurrent protection
Function can be switched ON/OFF
Setting range IR = In x …
In
L
N
G
1
2
ETU745
✔
–
0.4, 0.45, 0.5, 0.55,
0.6, 0.65, 0.7, 0.8,
0.9, 1
✔
–
0.4, 0.45, 0.5, 0.55, 0.6,
0.65, 0.7, 0.8, 0.9, 1
–
–
✔
10s, set at 6 x Ir
10s, set at 6 x Ir
2, 3.5, 5.5, 8, 10,
14, 17, 21, 25, 30
Setting range of time delay t R at I 4t
(seconds)
Thermal memory
Phase loss sensitivity
Neutral protection
Function can be switched ON/OFF
N-conductor setting range IN = In x …
–
–
at tsd=20 ms (M)
–
–
–
–
–
at tsd=20 ms (M)
✔
✔ (via slide switch)
1
1, 2, 3, 4, 5
✔ (via slide switch)
at tsd=20 ms (M)
✔
✔ (via slide switch)
0.5 … 1
✔
–
1.25, 1.5, 2, 2.5,
3, 4, 6, 8, 10, 12
✔
–
1.25, 1.5, 2, 2.5,
3, 4, 6, 8, 10, 12
✔
✔ (via rotary switch)
1.25, 1.5, 2, 2.5,
3, 4, 6, 8, 10, 12
0, 0.02 (M), 0.1,
0.2, 0.3, 0.4
0, 0.02 (M), 0.1,
0.2, 0.3, 0.4
0.02 (M), 0.1, 0.2,
0.3, 0.4, OFF
– fixed only
– fixed only
✔ (via rotary switch)
–
–
✔
–
–
✔
0.1, 0.2, 0.3, 0.4
per CubicleBUS module
✔
–
Ii = 0.8 x Icw
50kA max
–
Ii = 0.8 x Icw
50kA max
✔ (via rotary switch)
1.5, 2.2, 3, 4, 6, 8, 10, 12
0.8 x Icw = max, OFF= I cw =EIP
–
–
✔ (standard)
–
(field installable module)
✔
–
✔
✔
–
–
–
–
A, B, C, D, E
–
✔
A, B, C, D, E
A, B, C, D, E
–
0.1, 0.2, 0.3, 0.4, 0.5
0.1, 0.2, 0.3, 0.4, 0.5
–
–
–
–
–
–
✔
0.1, 0.2, 0.3, 0.4, 0.5
per CubicleBUS module
Setting range of time delay tsd, fixed
(seconds)
Switch-selectable short-time delay
short-circuit protection
(I2t dependent function)
Setting range of time delay tsd at I2t
(seconds)
Zone Selective Interlocking (ZSI) function
Instantaneous overcurrent protection
Function can be switched ON/OFF,
Extended Instantaneous Protection
is enabled when OFF
Setting range Ii = In x …
I
ETU727
✔
–
0.4, 0.45, 0.5, 0.55,
0.6, 0.65, 0.7, 0.8,
0.9, 1
Switch-selectable overload protection
(I2t or I4t dependent function)
Setting range of time delay class t R at I 2t
(seconds)
Short-time delayed overcurrent protection
Function can be switched ON/OFF
Setting range Isd = In x …
S
ETU725
Ground fault protection 2
Trip and alarm function
Detection of the ground fault current
by residual summing method
Detection of the ground fault current
by direct sensing method
Setting range of the Ig for trip
Setting range of the Ig for alarm
Setting range of the time delay tg
(seconds)
Switch-selectable
ground fault protection
(I2t / fixed)
Setting range time delay tg at I2t
ZSI ground function
Extended Instantaneous Protection (EIP) allows the WL breaker to be applied at the withstand rating
of the breaker with minus 0% tolerance; that means no instantaneous override whatsoever. EIP further
enables the circuit breaker to be applied up to the full instantaneous rating of the breaker on systems
where the available fault current exceeds the withstand rating.
Ground Fault Module cannot be removed after installation.
O
✔ available
– not available
O
optional
2/3
WL MODBUS Communication and Electronic Accessories • January 2005
1
WL UL 489_Com-section 2
1/28/05
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Page 5
Communication-capable Circuit Breakers
WL Circuit Breaker
Basic Functions
ETU725
ETU727
ETU745
Selectable between
parameter set A and B
–
–
–
LCD, alphanumeric (4-line)
LCD, graphic
–
–
–
–
O
CubicleBUS integrated
Communication capability via
MODBUS or PROFIBUS
–
–
✔
–
–
✔
Metering function capability with
Metering Function PLUS
–
–
✔
✔
✔
✔
✔
✔
✔
–
–
–
✔
✔
✔
✔
✔
✔
✔
✔
–
✔
✔
✔
✔
✔
✔
✔
✔ (only with ground fault module)
✔ (only with ground fault module)
–
–
–
–
✔
✔
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔ (only with ground fault module)
✔ (only with ground fault module)
✔
✔
Parameter sets
LCD
–
Communication
Metering function
Display by LED
Trip unit active
Alarm
ETU error
L trip
S trip
I trip
N trip
G trip
G alarm
Tripped by extended protection or
protective relay function
Communication
Signal contacts with external CubicleBUS modules
(Opto or relay)
Overcurrent warning
Load shedding ON/OFF
Early signal of long-time trip (200 ms)
Temperature alarm
Phase unbalance
Instantaneous trip
Short-time trip
Long-time trip
Neutral conductor trip
Ground fault protection trip
Ground fault alarm
Auxiliary relay
ETU error
Step for Settings via Communications or ETU Key Pad
from … to
0…1
1 … 100
100 … 500
500 … 1000
step
0.1
1
5
10
from … to
1000 … 1600
1600 … 10000
10000 … max
step
50
100
1000
Setting range of the Ig
A
B
C
D
E
Frame Size II
100 A
300 A
600 A
900 A
1200 A
Frame Size III
400 A
600 A
800 A
1000 A
1200 A
✔ available
– not available
O
optional
2/4
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 2
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1:09 PM
Page 6
Communication-capable Circuit Breakers
WL Circuit Breaker
Functional overview of the trip unit system
Basic Functions
ETU748
ETU755
ETU776
✔
–
0.4, 0.45, 0.5, 0.55,
0.6, 0.65, 0.7, 0.8,
0.9, 1
✔
–
0.4 … 1 (step: 1A)
✔
–
0.4 … 1 (step: 1A)
✔
✔(via communications)
✔
2, 3.5, 5.5, 8, 10,
14, 17, 21, 25, 30
2 … 30 (step: 0.1s)
2 … 30 (step: 0.1s)
Setting range of time delay tR at I4t
(seconds)
Thermal memory
1, 2, 3, 4, 5
✔ (via slide switch)
1 … 5 (step: 0.1s)
✔ (on/off via communications)
1 … 5 (step: 0.1s)
✔ (on/off via key pad
Phase loss sensitivity
at tsd=20ms (M)
✔ (on/off via communications)
✔ (on/off via key pad
Neutral protection
Function can be switched ON/OFF
N-conductor setting range IN = In x …
–
–
0.5, 1, OFF
✔
✔ (via communications)
0.5, 1, OFF
✔
✔ (via key pad or communications)
0.5 … 2, OFF
Short-time delayed overcurrent protection
Function can be switched ON/OFF
Setting range Isd = In x …
✔
–
1.25, 1.5, 2, 2.5,
3, 4, 6, 8, 10, 12
✔
✔ (via communications)
1.25 … 0.8 x Icw = max
(step: 10A)
✔
✔ (via key pad or communications)
1.25 … 0.8 x Icw = max
(step: 10A)
M, 0.1, 0.2, 0.3, 0.4
M, 0.08 … 0.4, OFF (step: 0.001s)
M, 0.08 … 0.4, OFF (step: 0.001s)
✔ (via rotary switch)
✔ (via communications)
✔ (via key pad or communications)
0.1, 0.2, 0.3, 0.4
per CubicleBUS module
✔
0.1 … 0.4 (step: 0.001s)
per CubicleBUS module
✔
0.1 … 0.4 (step: 0.001s)
per CubicleBUS module
✔
–
– Ii = Icw = EIP
✔ (via communications)
✔ (via key pad or communications)
1.5 x In … 0.8 x Ics = max, OFF= Icw =EIP 1
1.5 x In … 0.8 x Ics = max, OFF= Icw =EIP
O (field installable module)
✔
O (field installable module)
✔ (via communications)
O
✔
✔
✔
✔
A, B, C, D, E
A, B, C, D, E
✔
A … E (step: 1A)
A … E (step: 1A)-
✔
A … E (step: 1A)
A … E (step: 1A)
0.1, 0.2, 0.3, 0.4, 0.5
0.1 … 0.5 (step: 0.001s)
0.1 … 0.5 (step: 0.001s)
✔
0.1, 0.2, 0.3, 0.4, 0.5
per CubicleBUS module
✔
0.1 … 0.5 (step: 0.001s)
per CubicleBUS module
✔
0.1 … 0.5 (step: 0.001s)
per CubicleBUS module
Long-time overcurrent protection
Function can be switched ON/OFF
Setting range IR = In x …
In
L
N
S
I
G
1
2
Switch-selectable overload protection
(I2t or I4t dependent function)
Setting range of time delay class tR at I2t
(seconds)
Setting range of time delay tsd, fixed
(seconds)
Switch-selectable short -time delay
short-circuit protection
(I2t dependent function)
Setting range of time delay tsd at I2t
(seconds)
Zone Selective Interlocking (ZSI) function
Instantaneous overcurrent protection
Function can be switched ON/OFF,
Extended Instantaneous Protection
is enabled when OFF
Setting range Ii = In x …
Ground fault protection 2
Trip and alarm function
Detection of the ground fault current
by residual summing method
Detection of the ground fault current
by direct sensing method
Setting range of the Ig for trip
Setting range of the Ig for alarm
Setting range of the time delay tg
(seconds)
Switch-selectable
ground fault protection
(I2t / fixed)
Setting range time delay tg at I2t
ZSI ground function
1
or communications)
or communications)
Extended Instantaneous Protection (EIP) allows the WL breaker to be applied at the withstand rating of
the breaker with minus 0% tolerance; that means no instantaneous override whatsoever. EIP further
enables the circuit breaker to be applied up to the full instantaneous rating of the breaker on systems
where the available fault current exceeds the withstand rating.
Ground Fault Module cannot be removed after installation.
(field installable module)
✔ (via key pad or communications)
✔ available
– not available
O
optional
Notes:
M = Indicates phase loss sensitivity is enabled. LT pickup reduced 80% when phase unbalance > 50%. ST delay = 20ms
Communications = Setting the parameters of the trip unit via the Breaker Data Adapter, MODBUS, or PROFIBUS
Key pad = Direct input at the trip unit
2/5
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 2
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Page 7
Communication-capable Circuit Breakers
WL Circuit Breaker
Basic Functions
ETU748
ETU755
ETU776
–
✔
✔
LCD, alphanumeric (4-line)
LCD, graphic
O
–
–
–
–
✔
CubicleBUS integrated
Communication capability via
MODBUS or PROFIBUS
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔ (only with ground fault module)
✔ (only with ground fault module)
✔
✔
✔
✔
✔
✔
✔
✔ (only with ground fault module)
✔ (only with ground fault module)
✔
✔
✔
✔
✔
✔
✔
✔ (only with ground fault module)
✔ (only with ground fault module)
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔ (only with ground fault module)
✔ (only with ground fault module)
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔ (only with ground fault module)
✔ (only with ground fault module)
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔
✔ (only with ground fault module)
✔ (only with ground fault module)
✔
✔
Parameter sets
Selectable between
parameter set A and B
LCD
Communication
Metering function
Metering function capability with
Metering Function PLUS
Display by LED
Trip unit active
Alarm
ETU error
L trip
S trip
I trip
N trip
G trip
G alarm
Tripped by extended protection or
protective relay function
Communication
Signal contacts with external CubicleBUS modules
(Opto or relay)
Overcurrent warning
Load shedding ON/OFF
Early signal of long-time trip (200 ms)
Temperature alarm
Phase unbalance
Instantaneous trip
Short-time trip
Long-time trip
Neutral conductor trip
Ground fault protection trip
Ground fault alarm
Auxiliary relay
ETU error
✔ available
– not available
O
optional
2/6
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 8
Communication-capable Circuit Breakers
WL Circuit Breaker
Data Availability on the CubicleBUS
If a data source (module) does not exist, the data point
does not exist either.
All modules connected to the CubicleBUS can request data
from other modules via the bus and generate data
themselves that can be read by other modules.
Again, the relevant property byte contains this
information.
Each data point in the comprehensive WL Circuit Breaker
data dictionary can only be generated by a single
module—the data source. If this data source (module)
exists, the data points assigned to it also exist.
The following table provides an overview of the internal
CubicleBUS modules and the data point groups (collection
of several data points) assigned to them.
See Chapter 3 Register List for a detailed description of
the individual data points.
This information is described and communicated in the
property bytes.
CubicleBUS Modules
Data point group
Data points with the same source
ETU745, 748,
755 or 776
Protection parameter set A
✓
Protection parameter set B (N/A for ETU745 or 748)
✓
BSS
COM16
Metering
Function Plus
Extended protection parameters
✓
Parameter for setpoints
✓
✓
MODBUS communication parameters
✓
Parameters for metering settings
Device identification data
✓
✓
✓
Circuit breaker position specifications
✓
Status info. (circuit breaker open/closed, storage spring, etc.)
Alarms
✓
Trip log
✓
✓
✓
Setpoint messages
Maintenance information
✓
✓
✓
Circuit breaker temperature
✓
Temperature in the cubicle
3-phase currents
✓
Current in neutral, ground-fault current; equip. spec.
✓
3-phase voltage
✓
Power KW, KVAR, KVA
✓
Power factor
✓
Frequency, total harm. distortion, form factor, crest factor
✓
Harmonic analysis
✓
Waveform buffer
✓
Event log
✓
System time
✓
Table 2-2 The table shows which data points from the data dictionary are generated by which CubicleBUS module,
enabling you to quickly find out which modules are required for which system.
2/7
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 9
Communication-capable Circuit Breakers
WL Circuit Breaker
The MODBUS COM16 Module and the BSS
The COM16 module enables the
WL Circuit Breaker to exchange
data via MODBUS to supervisory
systems and MODBUS masters.
The COM16 module retrieves
some of the key data on the
status of the circuit breaker
(circuit breaker open/closed,
closing spring charged, ready-toclose, etc.) via the CubicleBUS
from the BSS (breaker status
sensor). Both modules are,
therefore, offered together as
a MODBUS communication
package.
taking place via MODBUS (manual
or automatic operation) or
parameters from being changed.
All key events are assigned a time
stamp from the integrated clock to
enable operators to keep track of
alarms. This device clock can be
synchronized with the clock in the
automation system.
A temperature sensor integrated in
the COM16 module measures the
temperature surrounding the
breaker in the switchgear cubicle.
Three integrated microswitches
located in the COM16 module are
used to detect the position of the
circuit breaker (connect, test,
disconnect and not present) and
communicate via MODBUS. The
circuit breaker can be remotely
operated only in the test or
connect position.
MODBUS Module COM16
Pin Configuration
The COM16 module for the WL
enables the circuit breaker to be
connected to any MODBUS master
network. This makes it easy to add
WL and a COM16 to existing
MODBUS networks.
The COM16 module is connected to
the auxiliary conductor plug-in
system at X7.
If required, control/write access to
the circuit breaker can be locked
using hardware and software to
prevent any switching operations
The electrical connections to the
circuit breaker and the CubicleBUS
connection to the internal
CubicleBUS modules (ETU, BSS,
metering function, etc.) are defined
in Section 9 of the Operator's
Manual and the individual
instruction sheets.
Interposing relays must be used if
the opening and closing solenoids
are designed for voltages other than
24V DC.
Terminals X9.1 and X9.2 must be
used if the second shunt trip rather
than the first shunt trip is used to
open the circuit breaker via
communication.
The unassigned user output can be
used as required and must be
connected in the same way as a
coupling device (see Graphic 2-4).
It can be used, for example, to reset
the trip indicator if the remote reset
option has been installed. As with
Open and Close, only voltages of up
to 24V DC are permitted (note the
polarity); coupling devices must be
used for higher voltages.
The communications line is
connected to the 9-pin interface on
the front of the COM16 module.
The CubicleBUS connection for a
RJ45 plug is located at the rear and
is used to connect the external
CubicleBUS modules. If no external
CubicleBUS module is connected,
the terminating resistor supplied
must be used as an RJ45 plug.
The unassigned user input can be
connected using a contact element
with the 24V DC from pin 1 to
transmit the status of the contact
element.
Graphic 2-2 The text on the COM16 module shows the external pin
configuration for connecting the closing solenoid and the shunt trips, as well as
the MODBUS write protection function and the unassigned input/output.
2/8
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 2
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Page 10
Communication-capable Circuit Breakers
WL Circuit Breaker
MODBUS Write Protection (DPWriteEnable)
Write access via communications can be blocked either
temporarily or permanently.
The COM16 module features a hardware input for this
purpose. Pin 1 provides the 24V DC supply, which can
be connected to pin 2.
If this input is not bridged, write access and control is
disabled.
The following actions are blocked if the input of the
write-protect function has not been enabled:
• Breaker open/close
• Reset the last trip
• Change the protective parameters
• Change the parameters for the extended protection
function (metering function)
• Change the communication parameters
• Settings of the metering options
• Reset maintenance information (counters)
• Force the digital outputs from WinPM.Net
The following control functions are available even if
the write protection function has not been enabled:
Graphic
2-3
This diagram illustrates how to wire the COM16 module if MODBUS is to
be used to switch the device open and closed. This diagram only applies
to 24V DC control voltage.
Graphic
2-4
Interposing relays are required if a control voltage different than 24V DC
is used. If the 1st shunt trip is not used to switch off the device, use
terminals X9.1 and X9.2 to utilize the 2nd shunt trip.
• Change and set the trigger functions for the
waveform buffer
• Read the content of the waveform buffer
• Change the setpoint parameters
• Set/change the system time
• Change the free texts (comments, system IDs)
• Reset the min./max. values
• Change the unassigned user output
MODBUS Installation Guideline
The COM16 must be assembled and connected
as described in the WL Operating Instructions.
Of particular importance is the requirement to
ground the shield of the MODBUS cable.
2/9
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 11
Communication-capable Circuit Breakers
WL Circuit Breaker
The write-protect function ensures that all the
required information can be transmitted, but
prevents any changes to the status of the circuit
breaker. Changes can then only be made locally.
Why does the write protection function permit
certain actions?
All actions that are not blocked are for remote
analysis only and do not have any effect on the
current status.
Data Exchange via the COM16 Module
When the COM16 module is configured to
exchange data, it is important to note that it is
shipped as standard with MODBUS address 126.
This can be changed during system configuration
(e.g. with the BDA, WinPM.Net, WL Config
software or ETU776 display).
The COM16 module has two LEDs (MODBUS and
CubicleBUS) for diagnostic purposes. These
indicate the operating status of the
communication line and the CubicleBUS networks.
Figure
2-1
Front view of the MODBUS module for the WL Circuit Breaker with the
MODBUS connection and the two LEDs. The figure below shows a section
of the ETU745 and its LEDs for displaying status.
Graphic
2-2
Rear view of the COM16 module. The RJ45 connection for the external
CubicleBUS modules can be clearly seen here. If no external CubicleBUS module
is connected, the bus must be terminated with the terminating resistor.
Two LEDs are used to determine whether a
CubicleBUS module in the circuit breaker is
operational. First, the "COMM" LED on the trip
unit must be green, that is, the trip unit has
recognized at least one other CubicleBUS module.
At a minimum, this would only be the Metering
Function PLUS if the CubicleBUS was then
interrupted. Second, the CubicleBUS LED on the
COM16 module must be taken into account. If
this is lit with a steady green light, a connection
exists from the COM16 module to at least the
metering function Plus module.
If both LEDs are green (steady light for CubicleBUS
on the COM16 module and COMM on the trip
unit), communication is fully established between
the trip unit and the COM16 module.
Data is exchanged according to the following
principle: an up-to-date copy of all WL Circuit
Breaker data (apart from the waveform buffer) is
always stored in the COM16 module. A response
to a data query from the COM16 module to the
supervisory system can, be typically transmitted
in just a few milliseconds. Write data from the
supervisory system is forwarded to the
appropriate addressee on the CubicleBUS.
Meaning
Position and text on the cable
CubicleBUS -
X7.1
CubicleBUS +
X7.2
24V DC +
X7.3
24V DC ground
X7.4
Table 2-3 The 4 black cables from the COM16 module must be connected to
terminal strip X7, which is used to connect the COM16 module to the modules on
the CubicleBUS in the circuit breaker.
2/10
WL MODBUS Communication and Electronic Accessories • January 2005
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Page 12
Communication-capable Circuit Breakers
WL Circuit Breaker
When the circuit breaker is fully
withdrawn, no further microswitches
are actuated. "Circuit breaker fully
withdrawn" is communicated
immediately.
MODBUS LED
Meaning
Off
No voltage on the COM16 module
Red
Bus error
Communication not possible
No communication with class 1 master
Green
MODBUS communication OK
Cyclic data transmission with class 1 master
Table 2-4 The MODBUS LED provides information on the state of MODBUS communication in the
COM16 module.
With UL 489 fixed-mounted circuit
breakers, a heel plate is screwed to
the COM16 module to transmit
operating position.
CubicleBUS LED
Meaning
Off
No CubicleBUS modules found
Red
CubicleBUS error
Green flashing
CubicleBUS module found, but no metering
function Plus or trip unit
Steady green light
CubicleBUS module found and connection
with the metering function Plus and/or
trip unit
Table 2-5 The CubicleBUS LED provides information on the state of CubicleBUS communication in
the COM16 module.
Position
The sequence described above
provides hysterisis for communicating
contact position and avoids
intermittent contact postitions
from being communicated.
Rear
microswitch
(S46)
Middle
microswitch
(S47)
Front
microswitch
(S48)
Connect position
1
0
0
Test position
0
1
0
Disconnect position
0
0
1
Circuit breaker fully withdrawn
0
0
0
The COM16 module features a builtin temperature sensor, which is
installed outside the circuit breaker,
and measures the temperature
surrounding the breaker.
It also contains a clock that provides
a time stamp for all events, such as
minimum and maximum measured
values, as well as warnings and trips.
Table 2-6 The COM16 module has 3 microswitches for determining the position of the circuit
breaker in the guide frame. Depending on which switch is actuated, the position described above
is communicated via the comm. system (1=contact closed, 0=contact open).
Three microswitches located in the
COM16 module can determine the
position of a drawout circuit breaker
in the guide frame, which is then
communicated via the COM16
module. The positions are defined in
Table 2-6. When the position of the
circuit breaker has changed, the
microswitch that has been actuated
is opened before the next microswitch
is actuated. No microswitches are
actuated if the breaker is between
two of the three positions. The
previous state is communicated until
a new position is reached when the
circuit breaker is moved (see Table 2-6).
There is no way of determining the
direction in which the circuit breaker
is being moved once the "disconnect
position" microswitch has been
opened.
When the circuit breaker is initially
racked in, the next microswitch to be
actuated is the "test position." The
COM16 module communicates
"circuit breaker not present" until the
"test position" key is actuated. The
new event message is delayed by 10
seconds to ensure that the breaker is
firmly seated.
2/11
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 2
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Page 13
Communication-capable Circuit Breakers
WL Circuit Breaker
Breaker Status Sensor (BSS)
BSS stands for "breaker status
sensor." All microswitches that
contain information on the state of
the circuit breaker are either
installed directly to the BSS or
connected to it. The BSS makes this
digital information available on the
CubicleBUS.
If the status of the circuit breaker in
the switchgear is to be displayed or
read via communications, the BSS
module and the appropriate
signaling switch must be installed
(if they are not already). The circuit
breaker must be installed with an
electronic trip unit of type ETU745
or higher.
The BSS can also be field installed.
The BSS indicates the following
information:
• Closing spring
(charged/discharged)
• Position of the main contacts
(open/closed)
• Ready-to-close signal
• Bell Alarm switch on the trip unit
(connected to the red mechanical
trip indicator)
• Signaling switch on the first
shunt trip
• Signaling switch on the second
shunt trip
The BSS is included when you order
the communications option with
with the assembled circuit breaker.
If a BSS is required without
communication (e.g. for operating
the BDA), it can be ordered
seperately.
Figure
2-3
This picture shows the BSS signaling contacts and how they have to be connected.
The BSS is factory installed when the communications option is ordered with the
assembled breaker.
2/12
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 2
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Page 14
Communication-capable Circuit Breakers
WL Circuit Breaker
Metering Function Plus
The integrated metering function
General
can be used with all trip units
In addition to the current values
supplied by the trip unit, the
metering function provides the
measured values in the power
distribution system required for
Power Management (voltage, power,
etc.). With its extended protection
function (e.g. undervoltage), the
metering function also provides
further options for monitoring and
protecting the power distribution
system.
with a CubicleBUS connection. It
not only extends the range of
protection functions of the trip
unit but also provides additional
warnings and diagnostic options.
With its comprehensive range of
measured values, the integrated
WL Circuit Breaker metering
function is an excellent
alternative to external multifunction metering devices.
The option of generating warnings if
setpoints are exceeded, speeds up
response to system alerts. As a
result, the metering function can
significantly increase system up-time.
The metering function module is
installed on the back of the trip unit
(ETU), as shown in Fig. 2-4. The trip
unit and metering function module
exchange all current data via a highspeed synchronous interface. The
metering function module provides
all the connected modules (e.g. the
COM16 module or BDA) with the
parameters for the protective relay
functions, the setpoints, measured
value settings, and the measured
values via the CubicleBUS, so that
they can be processed further. Using
the two CubicleBUS connections,
the metering function module is
connected to the trip unit and either
the BSS or directly to X7.
The metering function can be
implemented in all circuit breakers
with ETU745, ETU755, ETU748 and
ETU776. If the Metering Function
PLUS module is ordered with the
assembled circuit breaker, it will
already be installed and ready for
operation. The metering function
can be retrofitted at any time if the
circuit breaker is equipped with one
of the trip units listed above. It is
simply screwed onto the trip unit and
the CubicleBUS lines are snapped in.
Note: If installed by the customer,
the metering function is not
calibrated with the trip unit;
therefore, the accuracy of the
specifications in Table 2-7 cannot
be guaranteed.
Figure
2-4
The Metering Function Plus is located on the back of the trip unit. When ordered as
part of an assembled breaker catalog number, it is already installed and ready for
operation.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Metering Function Plus
The Metering Function Plus module
extends the range of metering
functions to include harmonic and
waveform analysis.
Harmonic analysis
The Metering Function Plus module
senses the current and voltage, saves
the measured values, and carries out a
fast Fourier transformation. The result is
the distribution of the harmonics (in %)
up to the 29th harmonic. The
calculated values are made available via
the CubicleBUS and can be displayed in
WinPM.Net and the BDA (see Chapters 3
and 4). They can also be saved as an
Excel-compatible *.csv file for
subsequent diagnosis. On the ETU776
trip unit, the measured and calculated
values can also be displayed.
The harmonic analysis enables not
only the quality of the network to be
analyzed and logged but also provides
settable alarm levels.
Figure
2-5
The Metering Function Plus analyzes the harmonics. This screenshot from the WinPM.Net
system shows how the analysis results are displayed.
Figure
2-6
Metering Function PLUS can record the current waveform. This can be displayed and
exported using WinPM.Net. A value of trip current is shown here.
Waveform buffer
The Metering Function Plus module
features two independent waveform
buffers (A and B). Each one has 8
channels, one each for currents Ia, Ib,
Ic, IN, and Ig, and voltages Va, Vb, and
Vc. Each channel is sensed with a
frequency of 1,649 kHz and the values
are "pushed" through a shift register
(length: 1 second). The process of
pushing data through the shift register
can be aborted by a configurable
trigger event. Trigger events include
trips, warnings and setpoint alarms
so that the voltage waveform, for
example, can be recorded in the
event of undervoltage tripping.
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Communication-capable Circuit Breakers
WL Circuit Breaker
The trigger event can be set
individually for each waveform
buffer. The point at which the trigger
event is to take place in the
waveform buffer can also be defined.
This setting can be used to set the
ratio of the pre-event history to the
post-event history. If the pre-trigger
event history is to be analyzed, the
position can be set to 80%. When the
event occurs, 0.8 seconds of preevent history and 0.2 seconds of
post-event history are available in the
waveform buffer, and an existing
COM16 module adds a time stamp to
the trigger event.
Each waveform buffer stops
independently, depending on the
trigger event and can be activated
again once the analysis is complete.
A large amount of data (approx. 25
kByte for each waveform) can be
downloaded and analyzed using
WinPM.Net, the BDA and the ETU776
display. Depending on the option,
a range of zoom options and export
functions are available.
600:120 = 5:1
(ITI Part # 460-600 or 468-600)
VT Accuracy
Each Metering Module presents a
purely resistive (unity power factor)
load to the transformer. Assuming no
other devices connected to the VT, a
ITI type 486 VT can safely feed 10
metering modules and and still
maintain 0.6% accuracy assuming the
wiring from the VT to the individual
metering modules is twisted pair and
kept to a minimum length.
This data applies to ambient
temperatures from 30ºC to 50ºC and
a primary voltage from 80% to 120%
Vn .
Maximum distance from voltage
transformer
The maximum distance between the
metering function and the voltage
transformer depends on the cable
size and the desired accuracy class.
For a 14AWG cable, the maximum
distance should not exceed 50 m for
class 0.5 and 100 m for class 3. In
areas with high EMC exposure,
shielded cable should be used.
Parameters for the settings of the
metering function
The trip unit settings which must be
made are:
1) VT Primary Voltage (240V, 480V,
600V)
2) VT Secondary Voltage (100V,
110V, 120V)
3) VT Connection (Wye / LG, Delta / LL)
The following tools and functions are
available if the parameters have to be
changed:
• WinPM.Net
• WL Config
• BDA/BDA Plus
• ETU776 display
Voltage Transformers
For isolation reasons, a voltage
transformer is used in conjunction
with the Metering Function Plus
module. This prevents voltage signals
of up to 1kV from reaching the ETU
directly via the auxiliary secondary
connections.
The metering module (“Metering
Function Plus”) can be set to expect
3W or 4W (LL/LG) connections and
will adjust the amplitude and phase
of the signal as necessary.
Metering VT Settings:
Delta/Wye : Delta
VT Primary: 480 (for example)
VT Secondary: 120 (for example)
Three VTs must be used at all times.
All three VTs should be rated for the
nominal system L-L voltage (e.g.
480V) and may have either 100V,
110V or 120V secondary voltages.
The following ratios and suggested
and equivalent VTs can be used:
240:120 = 2:1
(ITI Part # 460-240 or 468-240)
480:120 = 4:1
(ITI Part # 460-480 or 468-480)
Metering VT Settings:
Delta/Wye : Delta
VT Primary: 480 (for example)
VT Secondary: 120 (for example)
Note: Required primary and secondary
overcurrent protection (fusing) not shown
for clarity.
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Communication-capable Circuit Breakers
WL Circuit Breaker
The metering function provides the following measured values for communication system:
Measured value
Value range
Accuracy (with direct order: circuit breaker +
trip unit + met. function or met. function Plus)1
Currents Ia, Ib, Ic, IN
30 ... 8000A
± 1%
Ground-fault current Ig (measure with external G transformer)
100 ... 1200A
± 5%
Line-to-line voltages Vab, Vbc, Vca
80 ... 120% Vn
± 1%
Line-to-neutral voltages Van, Vbn, Vcn
80 ... 120% Vn
± 1%
Average value of phase-to-phase voltages VLLAVG
80 ... 120% Vn
± 1%
Apparent power kVA per phase
13 ... 8000kVA
± 2%
Total apparent power KVA
13 ... 24000kVA
± 2%
Active power kW per phase
-8000 ... 8000kW
± 3% (power factor > 0.6)
Total active power kWtotal
-24000 ... 24000kVA
± 3% (power factor > 0.6)
Reactive power kvar
-6400 ... 6400kvar
± 4% (power factor > 0.6)
Total reactive power kvar
-20000 ... 20000kvar
± 4% (power factor > 0.6)
Power factor per phase
-0.6 ... 1 ... 0.6
± 0.04
Power factor total
-0.6 ... 1 ... 0.6
± 0.04
Demand of currents Ia, Ib, Ic
30 ... 8000A
± 1%
Average demand of 3-phase current
30 ... 8000A
± 1%
Demand kWD per phase
13 ... 8000kW
± 3% (power factor > 0.6)
kW demand 3-phase active power kWD total
13 ... 8000kW
± 3% (power factor > 0.6)
kVA demand kVA total
13 ... 8000kVA
± 2%
kVAR demand kVAR per phase
13 ... 8000kVA
± 2%
kVAR demand total
-24000 ... 24000kvar
± 4% (power factor > 0.6)
kWhr imported
1 ... 10000MWh
± 2%
kWhr exported
1 ... 10000MWh
± 2%
kVARh imported
1 ... 10000Mvarh
± 4%
kVARh exported
1 ... 10000Mvarh
± 4%
Frequency
15 ... 440 Hz
± 0.1 Hz
Total harmonic distortions for current and voltage
2 ... 100%
± 3% from the meas. range up to the 29th harmonic
Phase unbalance for current and voltage
2 ... 150%
± 1%
Table 2-7 The metering function provides a minimum and maximum measured value for each measured value specified above. If the metering
function is retrofitted by the customer, the accuracy of the values specified cannot be ensured, since it will not have been calibrated with the trip unit.
1. Accuracy is specified as follows: ± (x%) from the upper limit of effective range + 2 LSD (Least Significant Digit))
as shipped from the factory
Measurement conditions:
Frequency
f = 60 Hz
Power factor
cos = 1
Waveform
Total harmonic distortion≤ 5%; symmetrical load
Ambient temperature
35°C ± 5°C
Metering range:
Current
Voltage
Power supply
Warm-up period
Relative air humidity
UL Listed 24V DC class 2
2 hours
Up to 90%
0.2 ... 1.2 Inmax
0.8 ... 1.2 Vnmax
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Communication-capable Circuit Breakers
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The extended protective relay functions of the metering function can monitor the following criteria and initiate a trip
if values are exceeded.
Protective Relay Function
ANSI Device Number
Setting range
Possible delay
Current unbalance
46
5 ... 50%
0 ...15 s
Total harmonic distortion - current
81THDC
5 ... 50%
5 ...15 s
Voltage unbalance
47
5 ... 50%
0 ...15 s
Undervoltage
27
100 ... 1100V
0 ...15 s
Overvoltage
59
200 ... 1200V
0 ...15 s
Total harmonic distortion - voltage
81THDV
5 ... 50%
5 ...15 s
Direction of phase rotation
47N
-
-
Active power in normal direction
32
13 ... 4000kW
0 ...15 s
Active power in reverse direction
32R
13 ... 4000kW
0 ...15 s
Under frequency
81U
40 ... 70 Hz
0 ...15 s
Over frequency
81O
40 ... 70 Hz
0 ...15 s
Table 2-8 Additional trip criteria can be set using the extended protective relay functions. A delay time can be set to prevent transient events from
causing nuisance trips: the circuit breaker will not trip unless the condition is present for longer than the delay time.
The metering function supplies the following Alarm Setpoint Functions:
Alarm Function
Setting range
Possible delay
Over current
30 ... 10000A
0 ... 255 s
Over current - ground fault
30 ... 10000A
0 ... 255 s
Over current - N-conductor
30 ... 10000A
0 ... 255 s
Phase unbalance - current
5 ... 50%
0 ... 255 s
Demand - current
30 ... 10000A
0 ... 255 s
Total harmonic distortion - current
5 ... 50%
5 ... 255 s
Undervoltage
15 ... 1200V
0 ... 255 s
Overvoltage
200 ... 1200V
0 ... 255 s
Phase unbalance - voltage
5 ... 50%
0 ... 255 s
Total harmonic distortion - voltage
5 ... 50%
5 ... 255 s
Crest factor
1 ... 3,000
0 ... 255 s
Form factor
1 ... 3,000
0 ... 255 s
Active power in normal direction
13 ... 10000kW
0 ... 255 s
Active power in reverse direction
13 ... 10000kW
0 ... 255 s
Leading power factor
0 ... -0.99
0 ... 255 s
Lagging power factor
0 ... 0.99
0 ... 255 s
Demand - active power
-10000 ... 10000kW
0 ... 255 s
Apparent power
13 ... 10000kVA
0 ... 255 s
Reactive power in normal direction
13 ... 10000kvar
0 ... 255 s
Reactive power in reverse direction
13 ... 10000kvar
0 ... 255 s
Demand - apparent power
13 ... 10000kVA
0 ... 255 s
Demand - reactive power
13 ... 10000kvar
0 ... 255 s
Underfrequency
40 ... 70 Hz
0 ... 255 s
Overfrequency
40 ... 70 Hz
0 ... 255 s
Table 2-9 Alarm and setpoint functions allow events to be generated when system conditions deviate from their nominal values. The generation of the
events can be delayed to prevent transient conditions from “chattering”. These alarms are communicated via CubicleBUS and can cause output contacts
to close in the configurable output module and can freeze the waveform buffer in the metering function. Alarms are communicated to the COM16/15
where they can be transmitted to the master.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Important functions/parameters for communications
Thanks to their modular
Load Management
construction and numerous I/O
A circuit breaker with ETU745 or
higher, offers two current setpoint
values for local load management,
the upper setpoint being that of
load shedding, the lower setpoint
being that of load restore.
modules, WL Circuit Breakers
offer flexible system solutions.
These solutions include load
management, alarms and
additional tripping conditions
via the extended protective
functions. Although the
utilization of these functions is
also possible without the use of
communications, their benefits
can be fully utilized when used
in communication applications.
Note: These setpoints will not effect
the circuit breaker tripping function.
If the current exceeds the set load
shedding value in one phase, a
load shedding warning will be
generated. A load restore will only
be generated when this value drops
below the setpoint in all three
phases. The warning messages are
directly displayed by the BDA.
However, they are also stored in the
event log where they are labeled
with a time stamp.
Note: The event log is only available
with the COM16.
The respective process for the load
restore threshold is reversed if all
three phases fall short of the
setpoint, and a load shed warning
will be generated. If only one of the
three currents exceeds the setpoint,
a load restore event will not be
generated.
In order to avoid load shedding on
the basis of short-time current
peaks and valleys, they can be
delayed by a delay time t x which
can be set to between 1 s and 15 s.
The load management parameters
can be found in the parameter tree
of the BDA.
The load shedding/load restore
signals are available as outputs of
the digital output module, which
are provided with a rotary selection
switch.
Extended Protective Function
The extended protective function
of the metering modules adds
additional tripping functions. The
options listed in table 2-8 can be
used as additional monitoring
functions.
Figure
2-8
Load shedding and restore are explained in this graphic. It’s based on the assumption
of a WL Circuit Breaker with an overload setpoint of 1000 A.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Setpoints
In addition to the load management
option (load shedding/load restore),
the metering modules offer an
option for an automatic monitoring
of operating data and the
generation of an alarm.
The measured real power is either
assigned to a positive polarity (in
normal direction) or a negative
polarity (opposite normal direction).
In contrast, the measured currents
are always assigned a positive
polarity.
Two setpoints can be defined (e.g.
for overvoltage). With the lower
setpoint, an alarm can be generated
via the setpoint value (e.g. > 410V),
whereas, with a voltage increase, a
tripping event (e.g. > 430V) can be
generated.
With energy, the transmitted energy
values are incorporated in two
counters, real energy and real
energy opposite to normal
direction. The two energy counters
are not assigned a polarity.
Minimum for Communicated
Currents
All events (except for tripping
events) are labeled with a time
stamp and an ON (+) or OFF (-)
indication and entered in the
event log.
In order to avoid the detection,
display and communication of very
low currents generated by system
noise, even with the circuit breaker
in the disconnect position, the
"Minimum for Communicated
Currents" parameter offers the
option of setting all detected
current values smaller than this
parameter to zero. The factory
setting is 50A. This means that all
values smaller than 50A are
displayed as "0" on the display,
interpreted as "0" for internal
calculations (power) and also
transmitted as "0" via the
communications. If this parameter
is changed to "0", this function is
deactivated and all detected current
measuring values will be directly
used.
The trip log is similar to the event
log, however, only the last 5 trips
are recorded with a time stamp
and entered in the trip log.
Note: The event and the trip log are
only available with the COM16
module.
Event and Trip Log
The event log has a depth of 10
events and works like a FiFo
memory (first in, first out), i.e. the
oldest event is deleted from the
event log upon the occurrence of
a new event.
The parameter can be found in the
parameter tree of the BDA.
Normal Positive Power Flow
Direction
The current direction of the energy
"flow" and the question, "How much
energy has, up to now, flowed in
both directions?" is of particular
interest for tie breaker applications.
For a determination, it is important
to define a "normal direction". This
direction can either be "from top to
bottom" or "from bottom to top".
Figure
2-9
In the event log the last 10 events on the CubicleBUS are listed. The trip log
contains the last 5 trips. Both of them can be displayed with the BDA.
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Communication-capable Circuit Breakers
WL Circuit Breaker
External CubicleBUS Modules
By connecting additional,
Rotary Switches
Installation
external modules to the
With the exception of the
configurable output module, all
external CubicleBUS modules are
configured using rotary switches.
The external CubicleBUS modules
can be installed onto a standard
35mm DIN rail on the panel.
The cable for connecting the first
module to the circuit breaker must
be no longer than 2 m.
CubicleBUS, breaker status
information can be displayed
and data read from the
switchgear to the system. This
enables cost-effective solutions
to be implemented
for automating other devices in
the switchgear.
General
The arrow on the rotary switch
points to the function that is
currently active. With certain
modules (e.g. digital output
modules), the group selection (e.g.
"1st Module" left; highlighted) and
then any other settings (e.g. time
delay) must be taken into account.
More information on this is
provided with the individual module
instruction sheets and the WL
Instruction Manual.
Prefabricated cables, which can be
ordered separately in different
lengths, must be used to connect
the CubicleBUS modules
to each other and to the circuit
breaker. These cables enable
the various components to
communicate and supply the
CubicleBUS modules with 24V DC.
External CubicleBUS modules enable
the WL Circuit Breaker to
communicate with secondary
devices in the switchgear. They can
be used, for example, to activate
analog displays, transmit circuit
breaker status and cause of trip, and
read additional control signals. One
module is also available for zoneselective interlocking.
Five different CubicleBUS modules
can output data from the CubicleBUS
system (four digital output modules
and one analog output module). A
digital input module can transmit
data from the switchgear to the
MODBUS master, and a ZSI module
enables zone selective interlocking
among the circuit breakers.
Figure
2-10
Graphic
2-5
All external CubicleBUS modules have the same housing. The CubicleBUS can be connected
to X1 and X2 with an RJ45 plug or a terminal connection made to X3. This depends on
whether a COM16 module is available.
In this example, the rotary switch
has been set to function “0.2”.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Power Supply
Maximum CubicleBUS Configuration
CubicleBUS Installation Guidelines
The CubicleBUS must be supplied with
a UL Listed 24V DC class 2 power
supply across its entire length.
Reference pages 2/33 and 2/34 of
this manual for details pertaining to
the requirements of this power
supply. Terminals X8.3 and X8.4 or
the 4-pin plug for the external
CubicleBUS modules (X3) are available
for this purpose. As previously
mentioned, the 24V is conducted via
the CubicleBUS cables.
The CubicleBUS can comprise up to 13
modules:
• Total length of the CubicleBUS
cables: max. 10 m
• Electronic Trip Unit (ETU)
• Prefabricated cables must be used
to connect the CubicleBUS modules.
The power required for the 24V DC
supply depends on the CubicleBUS
configuration. The technical data for
the external CubicleBUS modules is
provided later in this chapter.
The control system (of the
CubicleBUS) must be connected to a
fused power supply (class 2), since
the system voltage drops to an
unspecified value in the event of a
short-circuit.
Attention: Connecting and
disconnecting CubicleBUS modules
when energized is not recommended
and can cause erroneous inputs or
outputs to be generated.
• Metering Function Plus
• Breaker Status Sensor (BSS)
• COM16
• BDA or BDA Plus
• ZSI module
• Digital output module with switch
position to the left (1st module)
• Digital output module with switch
position to the right (2nd module)
• Digital configurable output module
• Digital input module with switch
position to the left
• The last module on the line must
be terminated with a 120 Ω
terminating resistor (supplied with
each module).
• The cables must always be
connected from module to module.
Star connection is not permitted.
• The power supply must be
provided by a UL Listed 24V DC
class 2 power supply with
standard-tolerance and the
properties described on
page 2/33 and 2/34.
• Digital input module with switch
position to the right
• Analog output module with switch
position to the left (1st module)
Pin Configuration of the X3 on the
CubicleBUS Module
X3.1
24V DC common
• Analog output module with switch
position to the right (2nd module)
X3.2
CubicleBUS
Communications line -
In practice, however, not all of the
modules may be required.
X3.3
CubicleBUS
Communications line +
X3.4
24V DC +
Table 2-10 At X3, the CubicleBUS can be
supplied with 24V DC.
Figure
2-9
If external CubicleBUS modules are to be connected to the WL Circuit Breaker and a COM16 module is not available, the
first connection must be made with four wires. The CubicleBUS can then be connected with the supplied CubicleBUS lines
with RJ45 plugs, and the power supply connected to X3, as shown.
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Communication-capable Circuit Breakers
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• The ZSI module must be the first
external module to be connected,
if used.
• If the BDA is connected to the
front interface of the trip unit,
the cable must be no longer
than 0.5 m.
LED Display
The LEDs on the external CubicleBUS
modules enable straightforward
module diagnosis and testing. As
explained in Tables 2-11 to 2-13,
the internal status and the
communications connection can be
diagnosed to ensure that they have
been wired correctly.
DEVICE LED
Meaning
Red
Internal error in the CubicleBUS module
Yellow
CubicleBUS module in test mode
Green
Module in operation
Table 2-11 The DEVICE LED indicates the state of the external CubicleBUS module.
CubicleBUS LED
Meaning
Green
Connection exists to a different module
Off
No other CubicleBUS module detected
Table 2-12 The CubicleBUS LEDs on the external CubicleBUS modules indicate whether communication
is taking place with other modules. This enables straightforward diagnosis.
All other LEDs
Meaning
Yellow
On the input module, this indicates an ON
signal at the corresponding input. With
digital output modules, the output is
active when the contact closed. With
analog output modules, a yellow LED
indicates that the full-scale deflection
value has been exceeded by 20%.
Off
The LED is off if none of the abovementioned conditions are present
Table 2-13 The LEDs indicate whether the outputs are set or the inputs are supplied with 24V DC
and have been activated.
Figure
2-11
If a COM16 module is available, the external CubicleBUS modules can be integrated in the system by connecting them to the CubicleBUS
cables supplied. The end of the CubicleBUS must be installed with a terminating resistor. The power supply unit can simply be connected
via the X3 interface.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Testing the Digital Input and
Output Modules
Pressing the "Test" key several times
in quick succession then switches the
corresponding input or output ON
and OFF alternately.
The test should be performed prior
to any commissioning work to
determine whether the circuit
breaker and its components function
properly.
The test mode can be used to check
that the CubicleBUS modules function
properly. A distinction must be made
between the individual modules.
Pressing the "Test" key on the
CubicleBUS module starts the test
mode, and all the inputs, outputs,
and associated LEDs are deactivated.
The DEVICE LED changes from green
to yellow.
With the input module, the input
signals are also transmitted via the
CubicleBUS and via the COM16 if
connected.
With the digital output modules,
the associated outputs are also
switched, thereby enabling the
system to be checked.
The test mode of the analog output
module and the ZSI module is
described in the chapter on the
appropriate module.
The inputs on the input module,
outputs on the output module, the
ZSI input, and the ZSI output can be
"forced" via the BDA and WinPM.Net
communication system. The test
mode can be activated via the
communication system and the
inputs and outputs overwritten for
test purposes.
The system exits the test mode
automatically after 30 seconds if the
test key is not actuated or no changes
have been made via the
communication system.
The test scenarios for the analog
output module and ZSI are explained
in the respective sections.
Checking the inputs and outputs on the digital input/output modules
DEVICE
Normal operating condition of the input/output module. The
inputs/outputs are either ON or OFF depending on the wiring
or communications.
After a pause of more than 2 s,
press the "Test" key.
DEVICE
The module switches to the test mode, as indicated by the
yellow DEVICE LED.
After a pause of more than 2 s,
press the "Test" key.
DEVICE
Pressing once selects input or output 1, as indicated by the green LED
1. The output can then be switched on or off, and the ON or OFF signal
of the input can be transmitted by pressing the "Test" key quickly (1 s).
DEVICE
Input or output 2 selected. As with 1, the output can be
switched by pressing the key quickly. With relay modules, you
will be able to hear a click.
DEVICE
Input or output 3 selected. With input modules, the presence of
24V DC at the corresponding input is simulated and transmitted
via the CubicleBUS.
Normal operation
After a pause of more than 2 s,
press the "Test" key.
After a pause of more than 2 s,
press the "Test" key.
After a pause of more than 2 s,
press the "Test" key.
After a pause of more than 2 s,
press the "Test" key.
After a pause of more than 2 s,
press the "Test" key.
After a pause of more than 2 s,
press the "Test" key.
After a pause of more than 2 s,
press the "Test" key.
DEVICE
DEVICE
DEVICE
DEVICE
Input or output 4 selected. The selected input or output can be
tested by quickly pressing the "Test" key.
Input or output 5 selected. The selected input or output can be
tested by quickly pressing the "Test" key.
Input or output 6 selected. The selected input or output can be
tested by quickly pressing the "Test" key.
Overall LED test. If the "Test" key is not pressed within 30
seconds, the system exits test mode.
DEVICE
The test procedure can now start from the beginning.
Table 2-14 The table shows the test procedure for checking the digital inputs and outputs on the CubicleBUS. If the “Test” key is not pressed within 30
seconds, the system exits test mode automatically.
2/23
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Communication-capable Circuit Breakers
WL Circuit Breaker
Digital Input Module
Functional description
The digital input module enables up
to six additional binary signals (24V
DC) to be connected. Signals, such
as the status of the breaker, the
status of the switchgear cabinet
door, or a signal indicating that a
predefined temperature has been
exceeded, can be transmitted
directly and processed at the field
bus level.
A total of 6 inputs are available in
the "BUS Input" Switch position.
Six inputs are also available if the
rotary switch is in the "Parameter
Switch" position, although the first
input causes the active parameter
set to change. If the connected ETU
does not have two parameter set
capablity (e.g. ETU745 or ETU748),
this input can also be used without
any restrictions.
Functional description for
changing parameter sets
Trip units ETU755 and ETU776 have
two different parameter sets for the
protection function. This function is
particularly useful in the event of a
power failure when an automatic
transfer is made from utility to
generator, a process which may
require that all the protective
functions change.
The MODBUS communication
system, the BDA, the ETU776
display, or the digital input module
can be used to switch between the
two parameter sets.
For this purpose, the first module
input is used in the "Parameter
Switch" position on the rotary
switch. If a "1" signal is detected
(LED on input 1 is yellow), the
switchover to parameter set B is
communicated to the trip unit. If
the input signal switches back to
"0", the switchover to parameter set
A is communicated, and the LED on
input 1 is de-energized.
Since the CubicleBUS is event
controlled, trip unit ETU755 or
ETU776 switches over to the other
parameter set when a switchover
request is issued via the CubicleBUS.
This means that if a switchover is
made to parameter set B via the
BDA, for example, even though the
input on the digital input module is
set to "0" (parameter set A), the
active parameter set in the trip unit
switches to parameter set B. A
switchover event to parameter set A
is not initiated on the CubicleBUS
until the input on the digital input
module is set first to "1" and then
back to "0".
A maximum of two digital input
modules can be operated
simultaneously on one WL Circuit
Breaker: one as a module with the
"BUS Input" position and the other
as "Parameter Switch" mode.
Technical data for the digital input module
Figure
2-13
The position of the rotary
switch determines the
operating mode.
Operating voltage min. / max.
19.2V / 28.8V
Operating current min. / max.
29mA / 43mA
No. of channels per digital input module
6
Min. voltage value for detecting a "1" signal
>16V
Current per input for a "1" signal
7.5mA
Max. voltage value for detecting a "0" signal
<1V
Current input per input for a "0" signal
0mA
Max. no. of digital input modules per breaker
2
Power min. / max.
0.72W / 0.94W
Dimensions W / H / D
70 mm / 86mm / 95 mm
Weight
0.223 kg
Operating temperature range
-20°C / 60°C
Table 2-15 This table provides accurate technical data for the digital input module on the CubicleBUS.
2/24
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Communication-capable Circuit Breakers
WL Circuit Breaker
Digital Output Module with
Rotary Switch
The digital output module can be
used to output six events. These
events can be warnings or trips and
can be used for external annunciation
or control. A circuit breaker trip can
be wired to an Alarm Horn or Stack
Light.
The load shedding and load restoring
signals can enable a load to be
switched ON or OFF automatically
depending on the load.
The digital output module is available
in two versions. The "optocoupler"
version features solid state outputs.
The current carrying capacity of this
output is 150mA, and the nominal
voltage is 24V DC. Only DC voltage
can be switched. The "relay" version,
uses a relay contact with a maximum
load of 12A. Voltages of up 250V
AC/DC are possible. The relay contacts
are isolated.
The module is configured using a
rotary switch, which not only selects
one of the two output module
versions, but also sets the
appropriate delay time.
Selector switch position to the left
Delay time
If the rotary switch is positioned to
the left, outputs 1 through 6 are
assigned the following events:
The rotary switch can also be used to
set an additional delay time. Available
times are 0, 0.2 s, 0.5 s, 1 s, and 2 s.
These can be used, for example, to
suppress events that only last a short
time and not output them until they
have been present for a long period
(e.g. phase unbalance).
• Output 1: Long-time trip (L)
• Output 2: Short-time trip (S)
• Output 3: Instantaneous trip (I)
• Output 4: Ground fault trip (G)
• Output 5: Ground fault alarm signal
• Output 6: Trip as a result of
overload in the neutral conductor
(N)
Selector switch position to the right
If the rotary switch is positioned to
the right, the 6 outputs are
automatically assigned the following
functions:
• Output 1: Leading overload trip
signal (delay time 0s)
• Output 2: Trip unit error (ETU)
• Output 3: Load shedding
• Output 4: Load restoring
• Output 5: Temperature alarm
• Output 6: Current phase unbalance
Irrespective of the delay time that has
been set, the signal for the leading
overload trip, which can be used to
switch off and protect connected
frequency converters, is always
instantaneous.
A maximum of two digital output
modules with rotary switches can be
operated simultaneously on one WL
Circuit Breaker, otherwise erroneous
outputs may occur. They must be
configured opposite each other. One
in the operating mode with the
switch position to the left and one
with the switch position
to the right.
The LEDs display the current state of
the 6 outputs. If the LED is OFF, the
corresponding output is OFF. If the
LED is yellow, the output is ON.
Technical data for the digital output module with a rotary selection switch
Operating voltage min. / max.
19.2V / 28.8V
Operating current min. / max. optocoupler
29mA / 63mA
Operating current min. / max. relay
29mA / 250mA
No. of isolated channels per digital output module
6
Max. current rating for optocoupler output with 24V DC
100mA
Max. current rating for relay output with 24V DC / 250 V AC / 250V DC
5A / 5A / 0.25A
Max. no. of digital output modules on one CubicleBUS
2
Power loss min. / max.
0.74W / 5.4W
Dimensions W / H / D
70mm / 86mm /95mm
Weight (optocoupler / relay)
0.223 kg / 0.321 kg
Temperature range
-20°C / 60°C
Table 2-16 This table provides accurate technical data for the digital output module with rotary
Figure
2-14
Switch positioned to left / right
selects events in dark-gray /
light-gray fields.
switch on the CubicleBUS.
2/25
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Page 27
Communication-capable Circuit Breakers
WL Circuit Breaker
Configurable Digital Output
Module
The configurable digital output
module also has six outputs. Like
the digital output module with the
rotary switch, it is available with
optocoupler and relay outputs.
These events are available for the digital, configurable output module (part 1)
Circuit breaker closed
Circuit breaker open
Storage spring charged
Status
Unlike the modules with the rotary
switch, however, the outputs are
assigned using a software tool
rather than a selector switch.
WinPM.Net, WL Config or the BDA
can be used as configuration
software. The outputs can be
assigned the events in the table
opposite using drop-down fields.
The first three module outputs can
be assigned up to six events. All of
these events operate in parallel.
This triggers, for example, a type of
group signal when the circuit
breaker is either impending trip
mode or a phase unbalance
warning is present.
Group warning
Group trip
MODBUS write protection active
MODBUS communication OK
Overload
Overload in N-conductor
Load shedding
Alarms
Load restoring
Ground fault alarm
Overtemperature
ETU error
Phase unbalance - current
Long-time (L)
Short-time (S)
Instantaneous short-circuit (I)
The last three outputs can only be
assigned one of the events directly.
Configuration events include status
signals, warnings, tripped
indication, over/under setpoint
status, waveform buffer triggers
and the active parameter set.
Ready-to-close
Ground fault (G)
Overload in neutral conductor
Phase unbalance - current
Phase unbalance - voltage
Trips
Under frequency
Over frequency
The module outputs can be set
remotely using communications.
Undervoltage
Overvoltage
Active power in normal direction
Active power in reverse direction
Total harmonic distortion - current
Total harmonic distortion - voltage
Reversal of phase rotation direction
MODBUS bit 1
MODBUS bit 2
MODBUS bit 3
MODBUS output bits
MODBUS bit 4
MODBUS bit 5
MODBUS bit 6
Parameter set A active
Parameter set B active
Table 2-17 The events in this table (part 1) and the following table (part 2) are available on the
CubicleBUS. These can be output via the configurable digital output module.
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Communication-capable Circuit Breakers
WL Circuit Breaker
The status can be read via the input
module, which means that a motor
could be switched ON or OFF via the
configurable digital output module.
These events are available for the digital, configurable output module (part 2)
Over current
Over current in neutral conductor
Many other applications are also
possible.
Over current - ground fault
Phase unbalance - current
Unlike the digital output module with
the rotary switch, a time delay cannot
be added to the event. A setpoint can
be output with a delay via the
configurable digital output module,
for example, if the setpoint itself is
already delayed.
Like the digital output module with
the rotary switch, this module also
indicates the status of the outputs via
the associated LEDs.
Phase unbalance - voltage
Demand - current
Undervoltage
Overvoltage
Total harmonic distortion - current
Total harmonic distortion - voltage
Crest factor
Form factor
Setpoints
Under frequency
Attention: Do not power off the
configurable output module within
15 seconds of changing the
configuration via BDA or WinPM.Net.
This could result in a red DEVICE LED
and all outputs will be deactivated
indicating that the device is
incompletely configured.
Over frequency
Active power in normal direction
Active power in reverse direction
Apparent power
Reactive power in normal direction
Reactive power in reverse direction
Power factor leading
Power factor lagging
Demand - active power
Demand - reactive power
Demand - apparent power
Waveform buffer A
Trigger event
Waveform buffer B
Table 2-18 Part 2 of the table shows all the events on the CubicleBUS that can be output via the
digital configurable output module. Configuration is carried out using WinPM.Net, WL Config
or the BDA.
Technical data for the digital configurable output module
Figure
2-15
2/27
The outputs can only be
configured using
appropriate software.
Operating voltage min. / max.
19.2V / 28.8V
Operating current min. / max. (excluding relay)
29mA / 39mA
Operating current min. / max. relay
29mA / 250mA
No. of channels per digital output module
6
Max. current rating for optocoupler output with 24V
100mA
Max. current rating for for six relay outputs with 24V DC/250V AC/250V DC
5A / 5A / 0.25A
Max current rating for one relay output with 24V DC
2.7A
Max. no. of digital configurable output modules on one WL Circuit Breaker
1
Power loss min. / max.
0.74W / 5.4W
Dimensions W / H / D
70mm / 86mm / 95mm
Weight (optocoupler / relay)
0.223 kg / 0.321 kg
Operating temperature range
-20°C / 60°C
Table 2-19 This table provides technical data for the digital configurable output module on the
CubicleBUS.
WL MODBUS Communication and Electronic Accessories • January 2005
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Communication-capable Circuit Breakers
WL Circuit Breaker
Analog Output Module
The analog output module can be
used to output the most important
measured values sent via the
CubicleBUS to analog indicators (e.g.
analog meters) in the switchgear
cubicle door. Each analog output
module has four channels for this
purpose. The signals are available at
two physical interfaces: a 4 ... 20mA
and a 0 ... 10V interface.
The measured values are available
as 0 ... 10V via the X4 connector on
the CubicleBUS module (the 4 ...
20mA interface is available at X5).
Both outputs are always active at
the same time, and can be used
simultaneously.
The measured values, which are
output via the four channels, are
selected using a rotary switch. The
available outputs are current,
voltage, power, frequency and
power factor. Up to two analog
output modules can be operated on
one CubicleBUS. The selection panel
on the rotary switch is divided
vertically. If the switch is set to a
value on the left, the module is
automatically addressed as module 1.
If a second module exists, it must
be set to a value on the right. This is
the only way that two analog
output modules can operate
simultaneously.
All types of analog instruments with
an internal resistance of more than
20kΩ (for the voltage output) and
between 50Ω and 250Ω (as a
current output) can be used as
an indicator.
The LEDs for the channels are
yellow if the current value exceeds
the full-scale deflection by 20%
(with V, I and P), power factor is
greater than 0.8, or the frequency
greater than 45Hz.
designed for different rated
currents, the full-scale value must
be scaled automatically and the
maximum output value of the
analog output module interpreted.
The value of the rating plug is used
for this purpose.
The maximum value is calculated by
multiplying the value of the rating
plug by 1.2 and then rounding the
result up to the nearest 100.
Example: With a rating plug of
1600A, the full-scale value of the
analog panel meter must be 2000A
(1600 x 1.2 = 1920 -> 2000A). In
other words, 0V/4mA = 0A,
10V/20mA = 2000A.
Switch position "U"
A01: Active power phase kWa
A02: Active power phase kWb
A03: Active power phase kWc
A04: Total apparent power kVATOT
The full-scale deflection of the
active power in each phase is
calculated by multiplying the value
of the rating plug by the rated
voltage of the network. The fullscale deflection value is then
classified in a value range, as shown
in the table below.
Before the full-scale deflection can be
determined from the table, the
calculated value must be multiplied
by 3 for the total apparent power and
the total active power (position f).
When the rotary switch is in switch
position "U", the following voltages
are applied to the four analog
outputs:
Example: IR = 1600A, rated voltage
= 480V; -> full-scale deflection =
1,000,000 W
A01: Phase-to-phase voltage Vab
Since it can generally be assumed
that the frequency will be the same
across the three phases in all the
networks, switch position "f" is used
to provide a general overview by
outputting the most important
measured values (with the
exception of the current values). In
conjunction with another module in
position "I", all the most important
measured values can be displayed in
this way.
A02: Phase-to-phase voltage Vbc
A03: Phase-to-phase voltage Vca
A04: Phase voltage VN
In most cases, the phase-to-phase
voltage is output to the switchgear
cubicle doors. This is why the first
three channels are assigned these
measured values. If the voltage is
required between a phase and the
neutral conductor, this is available
via output A04.
The full-scale deflection for the
analog panel meter is calculated by
multiplying the rated voltage of the
network (primary voltage of the
voltage transformer) by 1.1 and
then rounding the result up to the
nearest 50.
Switch position "f"
Power value ranges [W/VA]
From
To
Full Scale Deflection
0
50,000
50,000
50,000
100,000
100,000
100,000
200,000
200,000
200,000
300,000
300,000
Example: If the rated voltage of the
network is 480V, the full-scale value
is 550V (480V x 1.1 = 528V ->
550V).
300,000
500,000
500,000
Switch position "I"
In switch position "I", the measured
current values are output linearly:
A01: Current in phase A
500,000
1,000,000
1,000,000
1,000,000
2,000,000
2,000,000
Switch position "P"
2,000,000
3,000,000
3,000,000
If the rotary switch is set to position
"P", the power measured values are
output via the four channels:
3,000,000
5,000,000
5,000,000
5,000,000
10,000,000
10,000,000
10,000,000
20,000,000
20,000,000
20,000,000
∞
30,000,000
A02: Current in phase B
A03: Current in phase C
A04: Current in the neutral
conductor
Since the circuit breaker can be
WL MODBUS Communication and Electronic Accessories • January 2005
Table 2-20 After multiplication, the full-scale
deflection of the power is sorted into ranges.
2/28
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Communication-capable Circuit Breakers
WL Circuit Breaker
A01: Network frequency
A02: Average value of the phase-tophase voltages
A03: Total active power
A04: Average value of the power
factors
The scale for displaying the frequency
must range from 45Hz to 65Hz. This
enables the standard frequencies in
countries where IEC and UL standards
apply to be displayed.
Example: 45Hz = 0 V/4mA and 65Hz
= 10V/20mA.
The scalings of the other measured
values can be read in the appropriate
switch positions.
Switch position "cos"
The following measured values are
output in switch position "cos":
A01: Power factor cosL1
The test mode is started by pressing
the "TEST" key and indicated by the
yellow DEVICE LED. Although the
measured values continue to be
updated in the test mode, they are
not output at their respective
channels.
• The test mode is started by pressing
the "TEST" key.
• Pressing the "TEST" key again
selects output 1, which is indicated
by LED A01. The test signal is
output. For currents, voltages, and
power rating values, this is
equivalent to the full-scale value,
with cos 1 and with a frequency
of 55Hz.
• Pressing the key again selects
output 2, which is indicated by LED
A02. This automatically deletes the
value at output 1 and sets the value
at output 2.
• By repeating the above steps, the
output and scaling of all four
outputs can be checked one after
the other.
• Selecting output A04 and pressing
the "TEST" key activates all four
LEDs, but does not activate an
output. Pressing the key again
selects output 1 again.
• If the "TEST" key is not pressed
within 30 seconds after an output
has been selected, the system exits
the test mode automatically and
returns to the standard operating
mode. The values, which are
constantly updated in the
background, are then updated at
the outputs again.
A02: Power factor cosL2
A03: Power factor cosL3
A04: Phase unbalance - current (%)
The power factors are displayed from
0.7 (leading) (= 0V/4mA) through 1
(= 5V/12mA) to 0.7 (lagging) (= 10
V/20mA). The phase unbalance of the
three currents is displayed from 0%
(0V/4mA) to 50% (10V/20mA).
Technical data for the analog output module
Operating voltage min. / max.
19.2V / 28.8V
Operating current min. / max.
63mA / 150mA
Note: Ensure that the polarity is
correct during connection.
Min. resistance connected to voltage output
20k Ω
Resistance range for connection to current output - min./max.
20 Ω / 250 Ω
Test function
Max. no. of analog output modules on one WL Circuit Breaker
2
Power loss min. / max.
0.74W / 5.4W
Dimensions W / H / D
70mm / 86mm / 95mm
Weight
0.223 kg
Temperature range
-20°C / 60°C
Table 2-21 This table provides technical data for the analog output module on the CubicleBUS.
Figure
2-16
The analog channels are
selected using the Rotary
Switch.
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Communication-capable Circuit Breakers
WL Circuit Breaker
ZSI Module
To use the ZSI function with the
WL Circuit Breaker, the external
CubicleBUS ZSI module must be
implemented.
The zone selective interlocking (ZSI)
module provides the complete
range of selectivity with the short
delay time of tZSI = 50 ms,
irrespective of the number of levels
and the location of the short-circuit
in the distribution system. Its
benefits become even more
apparent, the higher the number of
levels in large systems and the
longer the resulting delay times.
By shortening the time, the ZSI
module significantly reduces stress
and damage in the event of a shortcircuit in the switchgear.
Operating principle
If the ZSI module is used in a
distribution system comprising
several levels, each circuit breaker
affected by a short-circuit
interrogates the circuit breaker
directly downstream, to ascertain
whether the short-circuit also
occurred in the next level below:
• If the short-circuit did occur in the
downstream level, the upstream
circuit breaker delays tripping to
ensure that the circuit breaker
directly upstream of the shortcircuit has enough time to
interrupt the short-circuit.
Short-circuit at 3:
• If the circuit breakers in the
downstream level do not report a
short-circuit, the short-circuit
occurred between the two levels
in question. In this case, one of
the two upstream circuit breakers
interrupts the short-circuit once
the programmed delay time of tZSI
= 50 ms has elapsed.
Circuit breakers -Q5, -Q3, and -Q1
establish that a short-circuit has
occurred. -Q5 blocks -Q3 by means
of the ZSI signal and, as a result,
-Q1 too, so that they do not trip in
50 ms. Since -Q5 does not receive a
blocking signal from a subordinate
circuit breaker, it is responsible for
interrupting the short-circuit as
quickly as possible. If this does not
take place, because the circuit
breaker is no longer operational due
to an overcurrent, -Q3, as a backup,
trips after the time-discriminating
response time of 150 ms.
Example as illustrated in Graphic 2-6.
Short-circuit at 2:
This shows a section of a power
distribution system that has been
installed with the ZSI module. WL
Circuit Breakers are implemented at
different levels.
-Q1 and -Q3 establish that a shortcircuit has occurred; -Q5 does not.
For this reason, -Q3 does not
receive a blocking signal from -Q5,
but provides a blocking signal for
-Q1. This information tells -Q3 that
it is closest to the short-circuit and
trips with a delay of tS = 50 ms
instead of tsd = 150 ms. Time saved
= 100 ms.
Graphic 2-6 This graphic illustrates the operating principle of the ZSI function using an example in a power distribution system. It is also a
connection diagram that shows how the ZSI module must be wired if the WL Circuit Breakers are used.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Short-circuit at 1:
Only -Q1 establishes that a shortcircuit has occurred and does not
receive a blocking signal from a
subordinate level. For this reason,
it trips after tZSI = 50 ms. Time saved
= 250 ms.
The ZSI function can be used for
short-circuits between the phases (S),
with respect to ground (G), or for
both simultaneously (S+G). The
operating mode is set using the
rotary switch. If the switch is in the
"OFF" position, the ZSI is deactivated.
The ZSI module also provides the
blocking signal for the mediumvoltage level.
If a tie breaker is used in the power
distribution system, this can also be
equipped with the ZSI function and
integrated in the overall concept.
Up to 8 circuit breakers can be
connected to ZSI IN, and up to 20 to
ZSI OUT.
Attention: Proper performance
cannot be guaranteed if these
limits are exceeded.
The ZSI module must always be the
first external CubicleBUS module to be
connected to the COM16 module or
to X8.
Test function
The outputs are set (i.e. a blocking
signal is sent to other circuit
breakers) when the rotary switch is
set to "TEST".
Active inputs and outputs are
indicated by a yellow LED.
It is recommended that the ZSI signal
be transmitted via a shielded twisted
pair with a cross-section of at least
0.75 mm2 (18 AWG), and no more
than 400 m long.
Pressing the "TEST" key switches the
ZSI module to test mode, which is
indicated by the yellow DEVICE LED.
The inputs and outputs are selected
in the same way as the digital
input/output modules. When the ZSI
module input is selected, the input
can be toggled internally by pressing
and releasing the TEST key. When the
outputs are selected, the outputs can
be toggled by pressing and releasing
the TEST key. This enables the circuit
to be checked.
Technical data for the ZSI module
Operating voltage min. / max.
19.2V / 28.8V
Operating current min. / max.
31mA / 61mA
Automatic output reset after no more than...
3s
Shortest time blocking signal can be present at the outputs LV
100 ms
Shortest time blocking signal can be present at the outputs MV 500 ms
Figure
2-17
The function of the ZSI
module is selected using the
rotary switch.
Standard trip time (incl. all delays)
approx. 80 ms
Max. no. of circuit breakers connectable to ZSI IN
20
Max. no. of circuit breakers connectable to ZSI OUT
8
Max. no. of modules on one WL Circuit Breaker
1
Max. wire length for 2 x 18 AWG twisted pair
400 m
Power loss min. / max.
0.8W / 1.76W
Dimensions W / H / D
70mm /86mm /95mm
Weight
0.223 kg
Operating temperature range
-20°C / 60°C
Table 2-22 This table provides technical data for the ZSI module on the CubicleBUS.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Graphic 2-7 This diagram consists of two parts: the top half is a connection diagram. The bottom half shows the circuitry when a tie breaker is used.
2/32
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Communication-capable Circuit Breakers
WL Circuit Breaker
External power consumption of a WL Circuit Breaker with CubicleBUS
WL Circuit Breakers with
CubicleBUS are designed to
provide internal and external
communication when the main
contacts are open. It is therefore
necessary to connect an
external power supply.
General information
The current sensing devices of WL
Circuit Breakers consist of two
components. The Rogowski coils
deliver the current measuring
values, and the energy converters
provide the trip units with power.
For breakers without an additional
external supply, the trip units are
already activated and monitor the
current at minimum values of 80A
for Frame Size II, and 150A for
Frame Size III.
The current from the sensors are
sufficient to not only activate the
protective functions of the ETU745
or ETU748 trip units, but also to
activate the display, however, the
back-lighting requires an external
power supply. If the CubicleBUS has
been connected to a UL Listed 24V
DC class 2 power supply, the display
is fed with energy from this supply.
If additional CubicleBUS components
are applied on a WL Circuit Breaker,
the breaker must be connected to
an external UL Listed 24V DC class 2
power supply.
The CubicleBUS consists of four
wires, two for the communications
and two for the UL Listed 24V DC
class 2 power supply. The
CubicleBUS is connected to the
external terminal X8.1 to X8.4.
The display of the ETU776 only
functions when an external
CubicleBUS power supply has been
connected. The protective functions
are fully operational when primary
current is flowing even though the
display is not active.
Table 2-23 To find a suitable external power supply for the WL Circuit Breaker with CubicleBUS the continuous current and the peak inrush current
must be observed.
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Page 35
A power supply must be selected
in accordance with these two
characteristic values. Several WL
Circuit Breakers can be connected
to one power supply. For this
purpose, however, the total of the
continuous currents must be
considered. For example, the
6EP1332-2BA00 power supply can
The + 24V DC connection must be
connected to X8.3 and the ground
of the 24V DC voltage supply must
be connected to X8.4.
Selection criteria for the external
power supply:
• First, the maximum continuous
current which the CubicleBUS
modules draw from the
CubicleBUS supply must be
calculated. (see Table 2-23)
be used with up to 3 ETUs and up
to 16 CubicleBUS modules
simultaneously. The 6EP13321SH42 power supply can be used
with 2 ETUs and up to 8 CubicleBUS
modules simultaneously.
Selecting a suitable power supply from the Siemens product line
• Second, the peak inrush current
of all modules must be
calculated. The power supply
must be capable of bearing the
maximum peak inrush current
for a period of 100 ms.
Output current
Inrush current
Type
Order No.
2.5 A
< 30 A
Logo! Power
WLSITOP25
3.8 A
< 32 A
SITOP Power
WLSITOP1
Table 2-24 A Siemens power supply can be selected for one or more WL Circuit Breakers.
One WLSITOP1 can power the following combinations of accessories
For example: (2) ETU745 + (2) Metering Functions + (2) COM16 + (16) Digital CubicleBUS modules + (8) Analog CubicleBUS modules + (1) BDA
ETU745-776
6
5
5
5
4
4
4
4
3
3
3
3
2
2
2
2
Metering
0
0
5
0
0
4
0
4
0
3
0
3
0
2
0
2
COM16 or COM15
0
0
0
5
0
0
4
4
0
0
3
3
0
0
2
2
ZSI/Digital CubicleBUS modules
0
16
8
0
32
25
16
13
24
24
24
24
16
16
16
16
Analog CubicleBUS modules
0
2
1
0
5
3
2
2
7
6
5
5
9
9
8
8
BDA/BDA Plus
0
1
1
0
0
1
1
1
1
1
1
1
1
1
1
1
One WLSITOP25 can power the following combinations of accessories
For example: (2) ETU776 + (2) Metering Functions + (2) COM16 + (16) Digital CubicleBUS modules + (5) Analog CubicleBUS modules + (1) BDA
ETU745-776
4
4
4
4
3
3
3
3
3
2
2
2
2
Metering
0
4
4
0
0
3
3
0
3
0
2
0
2
COM16 or COM15
0
0
0
4
0
0
0
3
3
0
0
2
2
ZSI/Digital CubicleBUS modules
12
8
6
0
24
24
23
16
13
16
16
16
16
Analog CubicleBUS modules
2
1
1
0
4
4
3
2
2
6
6
5
5
BDA/BDA Plus
0
0
1
0
1
0
1
1
1
1
1
1
1
2/34
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Communication-capable Circuit Breakers
WL Circuit Breaker
Notes
2/35
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Page 1
MODBUS Profile
for WL Circuit Breaker
MODBUS Communication with the WL Circuit Breaker
Integration into Supervisory Systems
Supported Function Codes
Exception Responses
Default Register List
WL Configurator Brief Description
WL MODBUS Communication and Electronic Accessories • January 2005
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Communication-capable Circuit Breakers
WL Circuit Breaker
Supervisory Systems
The WL Circuit Breaker supports the
industry standard MODBUS protocol
through the COM16 interface.
Communication connections to the
COM16 are made through the DB-9
port on the front of the COM16; see
Graphic 3-2 for connecting cable pin
assignments. Typically the
communication wiring from the
COM16 will be installed at the factory
and run to communication terminal
blocks in the switchgear. At these
terminal blocks customers can
connect twisted shielded pair RS 485
cable to Ethernet Converters,
MODBUS Masters, PLCs or
supervisory control systems. When
the WL Circuit Breaker is installed in
Siemens switchgear as part of an
ACCESS power monitoring system,
the default wiring will be through a
Siemens power meter Ethernet
gateway or Ethernet converter
connected to a WinPM.Net
workstation. For customers with
existing MODBUS networks or who
require integration into a MODBUS
system the following information can
be used to develop a software
interface to the WL / COM16.
Data in the COM16 is organized in
what is referred to as “Datasets”. Each
dataset contains a group of
functionally common registers. For
instance all metered data is organized
in a dataset, which consists of 119
registers, min./max. information in
another dataset, and diagnostic
information in another dataset. In all,
the COM16 has a total of 28 datasets,
which can be read via communication.
Users can take advantage of this
structure and ask for blocks of data in
one message request, making
integration into MODBUS system fast
and efficient. The COM16 also
supports pre-configured or standard
register maps for simple data
interfacing. Users can define what
types of data they want in any of
three default register sets. Type 1
provides 4 default registers. Type 2
provides 8 registers, and Type 3
provides 14 registers, all in
consecutive order for easy requests.
The WL is included in WinPM.Net and
can be configured remotely using the
software or using the remote set-up
tool, WL Config.
Each register includes a
corresponding status register, which
can be read in order to validate the
real-time data. This register is
referred to as the property byte.
Graphic 3-1 Siemens Power Monitoring and control software WinPM.Net communicates to multiple device types using Ethernet, modem
and RS 485 serial networks. The integration of the WL Circuit Breaker into WinPM.Net is a key component of totally integrated power.
3/1
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Communication-capable Circuit Breakers
WL Circuit Breaker
Default Communication Parameters
The COM16 comes set-up with the following default Communication Parameters:
Baud: 19,200
Unit ID: 126
Parity: Even
Graphic 3-3
Data formating byte order
Data points larger than two bytes transmitted in the Motorola Format (Big-Endian)
Graphic 3-2
Byte order
Type of data
Byte 0
Byte 1
Byte 0
Byte 1
char, unsigned char
Byte 0
Byte 1
High byte
Low byte
signed int, unsigned int
Byte 0
Byte 1
High byte
Low byte
High word
Byte 2
Byte 3
High byte
Low byte
Low word
signed long, unsigned long
COM16 Supported Function Codes
Function 01: Read Coils
Function
This function reads the state of multiple Control Bits and Extra Flags in a COM16 slave.
Bit Start Address
Any value from 0000 hex to 000F hex. If any other address is specified, an Exception Code of 02 (Invalid Data
Address) will be returned.
Quantity of Bits
If “Quantity of Bits” is not in the range of 1 to 16, an Exception Code of 03 (Invalid Data Value) will be returned.
If an attempt to read a bit beyond Bit Address 000F hex is made, an Exception Code of 02 (Invalid Data Address)
will be returned.
Function 02: Read Discrete Inputs
Function
This function reads the state of the bits in the Status Register in a COM16 slave.
Bit Start Address
Any value from 0000 hex to 000F hex. If any other address is specified, an Exception Code of 02 (Invalid Data
Address) will be returned.
Quantity of Bits
If “Quantity of Bits” is not in the range of 1 to 16, an Exception Code of 03 (Invalid Data Value) will be returned.
If an attempt to read a bit beyond Bit Address 000F hex is made, an Exception Code of 02 (Invalid Data Address)
will be returned.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Function 03: Read Holding Registers
Function
This function reads a set of registers from a COM16 slave.
Start Address
Any value within the address range defined for each of the data sets. If any other address is specified,
an Exception Code of 02 (Invalid Data Address) will be returned.
Quantity of Registers
If “Quantity of Registers” is not in the range of 1 to 125, an Exception Code of 03 (Invalid Data Value)
will be returned. If the “Quantity of Registers” is not correct for the Dataset indicated by the “Start
Address”, an Exception Code of 02 (Invalid Data Address) will be returned.
Example:
Request Message to slave
The following is an example of a request to read Dataset 0 from a COM16 slave device at
MODBUS address 7. The length of Dataset 0 is 4 bytes.
07H
Slave Address
03H
Function Code
00H
Register Start Address "High" (Dataset 0 address is 0000 hex)
b7H
Register Start Address "Low"
00H
Quantity of Registers "High" (Register quantity is 4 decimal)
04H
Quantity of Registers "Low"
xxH
CRC Check Code "Low"
xxH
CRC Check Code "High"
Reply Message from slave
The response returns 2 registers containing the contents of Dataset 0.
07H
Slave Address
03H
Function Code
04H
Byte Count (Bytes returned is 4)
00H
Register Address 00H Data "High"
03H
Register Address 00H Data "Low"
00H
Register Address 00H Data "High"
00H
Register Address 01H Data "Low"
xxH
CRC Check Code "Low"
xxH
CRC Check Code "High"
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Communication-capable Circuit Breakers
WL Circuit Breaker
Function 04: Read Input Registers
Function
This function reads the Basic Data Registers from a COM16 slave. All three Basic Types (1, 2 and 3) are
supported. (see pages 3/11, 3/12 and 3/13 for Basic Data)
Start Address
Any Data Block register address that is valid for the currently selected Basic Type. If any other address is
specified, an Exception Code of 02 (Invalid Data Address) will be returned.
Quantity of
Registers
If “Quantity of Registers” is not in the range of 1 to 125, an Exception Code of 03 (Invalid Data Value) will be
returned. If the “Quantity of Registers” specified attempts to read beyond the last register of the currently
selected Basic Type, an Exception Code 02 (Invalid Data Address) will be returned.
Function 05: Write Single Coil
Function
This function sets the state of a single Control bit or Extra flag in a COM16 slave.
Bit Address
Any value from 0000 hex to 000F hex. If any other address is specified, an Exception Code of 02 (Invalid Data
Address) will be returned.
Bit status
The following two values are valid as the Bit Status:
FF00H set bit
0000H clear bit
If any other value is specified, an Exception Code of 03 (Invalid Data Value) will be returned.
Function 07: Read Exception Status
Function
This function reads the state of eight Exception Status bits from the COM16 slave.
The bits are defined in Table 3-1.
Bit Number
WL
0
Set = Inspect breaker contacts*
1
Set = Communication with trip unit is OK
2
Set = COM16 is OK
3
not defined, always zero
4
not defined, always zero
5
not defined, always zero
6
not defined, always zero
7
not defined, always zero
Table 3-1
*Refer to the Operator's Manual for proper procedure. (Only for WL ANSI / UL 1066 version.)
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Communication-capable Circuit Breakers
WL Circuit Breaker
Function 08: Diagnostics
Function
This function provides a method for checking the communication between the master and a COM16 slave.
COM16 slaves support the diagnostic sub-functions Return Query Data (0000 hex) and Clear Event Counter
(000A hex).
Diagnostic Code
0000 hex: Echoes the test data sent by the master.
000A hex: Clears the COM16 slave’s communications counters. (The data field for both Request and Reply is set
to 0000 hex.)
If any other value is specified, an Exception Code of 03 (Invalid Data Value) will be returned.
Function 11: Get Communication Event Counter
Function
Returns a status word and an event count from the COM16 slave's communications event counter. The event
counter is incremented once for each successful message completion. It is not incremented for exception
responses or Fetch Communication Event Counter commands. The event counter can be reset by means of the
Diagnostics function (code 08), with the sub-function Clear Counters (code 000A hex).
The normal response contains a two-byte status word, and a two-byte event count. The status word will be all
ones (FFFF hex) if the COM16 slave is still processing a previously issued program command (a busy condition
exists). Otherwise, the status word will be all zeros.
Function 12: Get Communication Event Log
Function
Returns a status word, event count, message count and a field of event bytes from the slave. The status word
and event count are identical to that returned by Function 11 (Fetch Communications Event Counter). The
message counter is incremented once for each message processed by the slave. The event bytes field contains 64
bytes, with each byte corresponding to the status of one MODBUS send or receive operation for the slave. The
slave enters the events into the field in chronological order. The Byte 1 is the most recent event. Each new byte
flushes the oldest byte from the field.
The normal response contains a two-byte Status field, a two-byte Event Count field, a two-byte Message Count
field and a 64 byte Event Byte field. The Byte Count contains the total number of bytes in these four fields.
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Communication-capable Circuit Breakers
WL Circuit Breaker
What the Event Bytes Contain
COM16 slave Receive Event
For a COM16 slave, an event byte returned by the Fetch
Communications Event Log function can be either of two
types. The type is defined by bit 7 (the high–order bit) in
each byte.
The slave stores this type of event byte when a query
message is received. It is stored before the slave processes
the message. This event is defined by bit 7 set to a logic
“1”. The other bits will be set to a logic “1” if the
corresponding condition is TRUE. The bit layout is:
Bit
Contents
0
Not Used
1
Communications Error
2
Not Used
3
Not Used
4
Character Overrun
5
Currently in Listen Only Mode (always zero, the COM16
does not support Listen Only Mode)
6
Broadcast Received
7
1
Table 3-2
COM16 slave Send Event
The slave stores this type of event byte when it finishes
processing a query message. It is stored if the slave
returned a normal or exception response, or no response.
This event is defined by bit 7 set to a logic “0”, with bit 6
set to a “1”. The other bits will be set to a logic “1” if the
corresponding condition is TRUE.
The bit layout is:
Bit
Contents
0
Read Exception Sent (Exception Codes 1-3)
1
Slave Abort Exception Sent (Exception Code 4)
2
Slave Busy Exception Sent (Exception Codes 5-6)
3
Slave Program NAK Exception Sent (Exception Code 7)
4
Write Timeout Error Occurred
5
Currently in Listen Only Mode (always zero, the COM16
does not support Listen Only Mode)
6
1
7
0
Table 3-3
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Communication-capable Circuit Breakers
WL Circuit Breaker
Function 15: Write Multiple Coils
Function
This function sets the state of multiple control bits and extra flags in a COM16 slave.
Bit Start Address
Any value from 0000 hex to 000F hex. If any other address is specified, an Exception Code of 02 (Invalid Data
Address) will be returned.
Quantity of Bits
If “Quantity of Bits” is not in the range of 1 to 16, an Exception Code of 03 (Invalid Data Value) will be returned.
If an attempt to write a bit beyond Bit Address 000F hex is made, an Exception Code of 02 (Invalid Data Address)
will be returned.
Byte Count
This is the “Quantity of Bits” / 8. If the division remainder is non-zero, then 1 is added to “Byte Count”. If “Byte
Count” is incorrect, an Exception Code of 03 (Invalid Data Value) is returned.
The following is an example of a request to set the state of six extra flags in a COM16 slave device at MODBUS
address 7. Attempts to change unused bits will have no effect. Setting the indicated bits would: Clear Logs, Clear
Min./Max., Clear Counters and Sync Time Stamp.
Bit:
10
11
12
13
14
15
State:
1
1
0
0
1
1
The data contents are one byte: 33 hex (0011 0011 binary). The binary bits correspond in the following way:
The byte transmitted (33 hex) addresses bits 10 ... 15, with the least significant bit addressing the lowest bit (10)
in this set. The unused bits are zero-filled.
The response returns the slave address, function code, starting address and Quantity of Bits written.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Function 16: Write Multiple Registers
Function
This function writes a complete Dataset to a COM16 slave.
Start Address
Any value within the address range defined for each of the data sets. If any other address is specified,
an Exception Code of 02 (Invalid Data Address) will be returned.
Quantity of Registers
If “Quantity of Registers” is not in the range of 1 to 125, an Exception Code of 03 (Invalid Data Value)
will be returned. If the “Quantity of Registers” is not correct for the Dataset indicated by the “Start
Address”, an Exception Code of 02 (Invalid Data Address) will be returned.
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Communication-capable Circuit Breakers
WL Circuit Breaker
Exception Responses
Except for broadcast messages, when a master device
sends a query to a slave device, it expects a normal
response. One of four possible events can occur from the
master's query:
1. If the slave device receives the query without a
communication error, and can handle the query normally,
it returns a normal response.
Example:
Request Message to slave
The following is an example of a request to read Dataset
1 (Diagnostic Information) from a COM16 slave device at
MODBUS address 7. Dataset 1 has 8 registers, but in this
example, the Master tries to read just 6 registers.
07H
Slave Address
03H
Function Code
01H
Register Start Address “High” (Dataset 1
address is 0100 hex)
3. If the slave receives the query, but detects a
communication error (parity or CRC), no response is
returned. The master program will eventually process a
timeout condition for the query.
00H
Register Start Address “Low”
00H
Quantity of Registers “High”
06H
Quantity of Registers “Low” (6 registers is not
valid)
4. If the slave receives the query without a
communication error, but cannot handle it (for example,
if the request is to read a non-existent coil or register),
the slave will return an exception response informing the
master of the nature of the error.
xxH
CRC Check Code “Low”
xxH
CRC Check Code “High”
The exception response message has two fields that
differentiate it from a normal response:
The response returns the function code with the high bit
set indicating an exception response. The Exception Code
returned is 03 (Invalid Data Value). This exception code
indicates that an illegal amount of data was specified for
the requested Dataset.
2. If the slave does not receive the query due to a
communication error, no response is returned. The
master program will eventually process a timeout
condition for the query.
Function Code Field: In a normal response, the slave
echoes the function code of the original query in the
function code field of the response. All function codes
have a most-significant bit (MSB) of 0 (their values are all
below 80 hex). In an exception response, the slave sets
the MSB of the function code to 1 (adds 80 hex to the
function code). With the function code's MSB set, the
master's application program can recognize the exception
response and can examine the data field for the
exception code.
Reply Message from slave
07H
Slave Address
83H
Function Code
03H
Exception Code (Illegal Register Amount)
xxH
CRC Check Code “Low”
xxH
CRC Check Code “High”
Data Field: In a normal response, the slave may return
data or statistics in the data field (any information that
was requested in the query). In an exception response,
the slave returns an exception code in the data field. This
defines the slave condition that caused the exception.
3/9
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Communication-capable Circuit Breakers
WL Circuit Breaker
Exception Codes
Code
Name
Meaning
01 hex
Illegal Function
The function code received in the query is not an allowable action for the COM16 slave. If a
Poll Program Complete command was issued, this code indicates that no program function
preceded it.
02 hex
Illegal Data Address
The data address received in the query is not an allowable address for the COM16 slave.
03 hex
Illegal Data Value
A value contained in the query data field is not an allowable value for the COM16 slave.
04 hex
Slave Device Failure
An unrecoverable error occurred while the COM16 slave was attempting to perform the
requested action.
05 hex
Acknowledge
The COM16 slave has accepted the request and is processing it, but a long duration of time
will be required to do so. This response is returned to prevent a timeout error from occurring
in the master. The master can next issue a Poll Program Complete message to determine if
processing is completed.
06 hex
Slave Device Busy
The COM16 slave is still busy processing the previous request. The master should re-transmit
the message later when the COM16 slave is free.
07 hex
Negative Acknowledge
This code is returned for an unsuccessful programming request using function code 13 or 14
decimal. The COM16 slave will never return this exception response since it does not support
function 13 or 14.
08 hex
Memory Parity Error
The COM16 slave attempted to read extended memory, but detected a parity error in the
memory. The master can retry the request, but service may be required on the COM16 slave
device.
Table 3-4
The following functions are not supported by the COM16. If a
COM16 slave receives a query for any of these functions, an
Exception Code of 01 (Illegal Function) will be the response.
Function 06: Write Single Register
Function 17: Report Slave ID
Function 20: Read General Reference
Function 21: Write General Reference
Function 22: Mask Write 4X Register
Function 23: Read/Write 4X Registers
Function 24: Read FIFO Queue
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Communication-capable Circuit Breakers
WL Circuit Breaker
Default Register Lists
(Function 04 Data Blocks)
Basic Data Type 1 Registers and Default Data Points
Register
Byte
Name
Default Data Point – WL
1
0, 1
Status Register
WL status bits
2
2, 3
Data Block 1
Phase 1 current
3
4, 5
Data Block 2
Phase 2 current
4
6, 7
Data Block 3
Phase 3 current
8, 9
Data Block 4
Max current in phase under highest load
10
Block 1 property byte
PB of phase 1 current
5
6
7
11
Block 2 property byte
PB of phase 2 current
12
Block 3 property byte
PB of phase 3 current
13
Block 4 property byte
PB of max current in phase under highest load
Table 3-5
Basic Data Type 2 Registers and Default Data Points
Register
Byte
Name
1
0, 1
Status Register
WL status bits
2
2, 3
Data Block 1
Phase 1 current
3
4, 5
Data Block 2
Phase 2 current
4
6, 7
Data Block 3
Phase 3 current
5
8, 9
Data Block 4
Max current in phase under highest load
6
10, 11
Data Block 5
Current in neutral conductor
7
12, 13
Data Block 6
Average phase to phase voltage
8
14, 15
Data Block 7
Average of power factors of 3 phases
9
16, 17
Data Block 8
Total active energy of 3 phases*
18
Block 1 property byte
PB of phase 1 current
19
Block 2 property byte
PB of phase 2 current
20
Block 3 property byte
PB of phase 3 current
10
11
12
13
Default Data Point – WL
21
Block 4 property byte
PB of max current in phase under highest load
22
Block 5 property byte
BP of current in neutral conductor
23
Block 6 property byte
BP of average phase to phase voltage
24
Block 7 property byte
BP of average of power factors of 3 phases
25
Block 8 property byte
BP of total active energy of 3 phases
*Only 2 bytes of the 4 byte data point will be communicated (range: 0 - 65535MWh)
Table 3-6
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Communication-capable Circuit Breakers
WL Circuit Breaker
Basic Data Type 3 Registers and Default Data Points
Register
Byte
1
0, 1
Status Register
WL status bits
2
2, 3
Data Block 1
Phase 1 current
3
4, 5
Data Block 2
Phase 2 current
4
6, 7
Data Block 3
Phase 3 current
5
8, 9
Data Block 4
Max current in phase under highest load
6
10, 11
Data Block 5
Current in neutral conductor
7
12, 13
Data Block 6
Phase to phase voltage L1 to L2
8
14, 15
Data Block 7
Phase to phase voltage L2 to L3
9
16, 17
Data Block 8
Phase to phase voltage L3 to L1
10
18, 19
Data Block 9
Phase to neutral voltage L1
11
20, 21
Data Block 10
Phase to neutral voltage L2
12
22, 23
Data Block 11
Phase to neutral voltage L3
13
24, 25
Data Block 12
Average of power factors of 3 phases
14
26, 27
Data Block 13
Total active energy of 3 phases*
15
16
17
18
19
20
21
22
Name
Default Data Point – WL
28, 29
Data Block 14
Total apparent power of 3 phases
30
Block 1 property byte
PB of phase 1 current
31
Block 2 property byte
PB of phase 2 current
32
Block 3 property byte
PB of phase 3 current
33
Block 4 property byte
PB of max current in phase under highest load
34
Block 5 property byte
PB of current in neutral conductor
35
Block 6 property byte
PB of phase to phase voltage L1 to L2
36
Block 7 property byte
PB of phase to phase voltage L2 to L3
37
Block 8 property byte
PB of phase to phase voltage L3 to L1
38
Block 9 property byte
PB of phase to neutral voltage L1
39
Block 10 property byte
PB of phase to neutral voltage L2
40
Block 11 property byte
PB of phase to neutral voltage L3
41
Block 12 property byte
PB of average of power factors of 3 phases
42
Block 13 property byte
PB of total active energy of 3 phases*
43
Block 14 property byte
PB of total apparent power of 3 phases
*Only 2 bytes of the 4 byte data point will be communicated (range: 0 - 65535MWh)
Table 3-7
For additional information on the controlling documents for the definitions of all MODBUS Public Function Codes referenced may be
downloaded in PDF format from the MODBUS website http://www.modbus.org.
3/12
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 3
1/28/05
1:10 PM
Page 14
Communication-capable Circuit Breakers
WL Circuit Breaker
Complete List of Datasets
Datasets: addresses, number of registers and read/write access of each.
Starting
register
address
Number
of registers
Number of
data bytes
Padding
byte
required
Read/
write
access
Dataset
Description
0
NST 2000/S7 diagnostic information
0000h
2
4
-
Rd
1
NST 2000/S7 diagnostic information (includes DS0)
0100h
8
16
-
Rd
51
Main overview
3300h
119
238
-
Rd
60
Control waveform
3C00h
28
55
Yes
Rd/Wr
61
Diagnostic waveform
3D00h
27
54
-
Rd
62
Diagnostic waveform data channel A and B
3E00h
120
240
-
Rd
64
Diagnostic harmonics
4000h
66
131
Yes
Rd
68
Modules information overview
4400h
23
45
Yes
Rd/Wr
69
Control modules
4500h
22
43
Yes
Rd
72
Metering data: min./max. current, form factor, crest factor
4800h
118
236
-
Rd
73
Metering data: min./max. voltage
4900h
87
174
-
Rd
74
Metering data: min./max. power
4A00h
68
136
-
Rd
76
Metering data: min./max. frequency and THD
4C00h
46
92
-
Rd
77
Metering data: min./max. temperature
4D00h
29
58
-
Rd
78
Metering data: min./max. current (VL only)
4E00h
52
104
-
Rd
91
Statistic information
5B00h
42
84
-
Rd
92
Diagnostic breaker
5C00h
97
194
-
Rd
93
Control metering/trip unit
5D00h
14
27
Yes
Wr
94
Metering data
5E00h
99
197
Yes
Rd
97
Identification details
6100h
112
223
Yes
Rd
98
HW/SW versions
6200h
47
93
Yes
Rd
100
Identification NST2000
6400h
50
100
-
Rd
128
Metering parameters
8000h
52
103
Yes
Rd/Wr
129
Protective parameters
8100h
70
139
Yes
Rd/Wr
130
Set point parameters
8200h
74
148
-
Rd/Wr
131
Parameters ON/OFF
8300h
35
70
-
Rd/Wr
160
Bus parameters
A000h
39
77
Yes
Rd/Wr
162
Device configuration
A200h
38
75
Yes
Rd/Wr
165
Identification description
A500h
97
194
-
Rd/Wr
NOTE:
1. Each Dataset’s starting address is the Dataset’s number, converted to hex, used as the high byte of the address. Example for Dataset
51:51 decimal equals 33 hex, which gives an address of 3300 hex.
2. Notice that datasets: 60, 64, 68, 69, 93, 94, 97, 98, 128, 129, 160 and 162 have an odd number of data bytes and must be padded
with an extra byte at the end of the dataset (set to 00 hex) to create an even number of words (registers).
3. Dataset 98 is for internal use only.
Table 3-8
3/13
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 3
1/28/05
1:10 PM
Page 15
Communication-capable Circuit Breakers
WL Circuit Breaker
Sample Dataset
Dataset 94 – Current Metering Values
Starting Address: 5E00 hex, Total Registers: 99, Access: Read Only
Byte
0
Register
424065
1
Description
Format
Units
Min
Max
Length
(Bits)
Scale
Phase unbalance current (in %)
%
0
100
unsigned char
8
0
Reserved
-
-
-
-
8
-
8000
unsigned int
16
0
2
424066
Demand current 3-phases
A
4
424067
Demand current L1
A
30
8000
unsigned int
16
0
6
424068
Demand current L2
A
30
8000
unsigned int
16
0
8
424069
Demand current L3
A
30
8000
unsigned int
16
0
10
424070
Phase A current
A
0
65535
unsigned int
16
0
12
424071
Phase B current
A
0
65535
unsigned int
16
0
14
424072
Phase C current
A
0
65535
unsigned int
16
0
16
424073
Current demand over three phases
A
0
65535
unsigned int
16
0
18
424074
Current N-phase
A
0
65535
unsigned int
16
0
20
424075
Ground fault current
A
0
65535
unsigned int
16
0
22
424076
Phase unbalance voltage (in %)
%
0
100
unsigned char
8
0
Reserved
-
-
-
-
8
-
23
24
424077
Delta voltage between Phase L1 and L2
V
15
1150
unsigned int
16
0
26
424078
Delta voltage between Phase L2 and L3
V
15
1150
unsigned int
16
0
28
424079
Delta voltage between Phase L3 and L1
V
15
1150
unsigned int
16
0
30
424080
Star voltage Phase L1
V
10
700
unsigned int
16
0
32
424081
Star voltage Phase L2
V
10
700
unsigned int
16
0
34
424082
Star voltage Phase L3
V
10
700
unsigned int
16
0
36
424083
Demand of the delta voltage
V
5
1150
unsigned int
16
0
38
424084
Demand of the star voltage
V
10
700
unsigned int
16
0
40
424085
Sum of apparent power
kVA
39
24000
unsigned int
16
0
42
424086
Sum of real power
kW
-24000
24000
signed int
16
0
44
424087
Real power in Phase L1
kW
-8000
8000
signed int
16
0
46
424088
Real power in Phase L2
kW
-8000
8000
signed int
16
0
48
424089
Real power in Phase L3
kW
-8000
8000
signed int
16
0
50
424090
Sum of reactive power
kvar
-24000
24000
signed int
16
0
52
424091
Demand of the real power 3-phases
kW
-8000
8000
signed int
16
0
54
424092
Demand of the real power in Phase L1
kW
-8000
8000
signed int
16
0
56
424093
Demand of the real power in Phase L2
kW
-8000
8000
signed int
16
0
58
424094
Demand of the real power in Phase L3
kW
-8000
8000
signed int
16
0
60
424095
Demand of the apparent power 3-phases
kVA
13
8000
unsigned int
16
0
62
424096
Apparent power in Phase L1
kVA
13
8000
unsigned int
16
0
64
424097
Apparent power in Phase L2
kVA
13
8000
unsigned int
16
0
66
424098
Apparent power in Phase L3
kVA
13
8000
unsigned int
16
0
68
424099
Demand of the apparent power
i. d. Phase L1
kVA
13
8000
unsigned int
16
0
(continued on the next page)
3/14
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 3
1/28/05
1:10 PM
Page 16
Communication-capable Circuit Breakers
WL Circuit Breaker
Dataset 94 – Current Metering Values
Starting Address: 5E00 hex, Total Registers: 99, Access: Read Only (continued from the previous page)
Byte
Register
Description
Format
Units
Min
Max
Length
(Bits)
Scale
70
424100
Demand of the apparent power
i. d. Phase L2
kVA
13
8000
unsigned int
16
0
72
424101
Demand of the apparent power
i. d. Phase L3
kVA
13
8000
unsigned int
16
0
74
424102
Demand of the reactive power 3-phases
kvar
-8000
8000
signed int
16
0
76
424103
Reactive power in Phase L1
kvar
-8000
8000
signed int
16
0
78
424104
Reactive power in Phase L2
kvar
-8000
8000
signed int
16
0
80
424105
Reactive power in Phase L3
kvar
-8000
8000
signed int
16
0
82
424106
Real energy in normal direction
MWh
0
10000
unsigned long
32
0
86
424108
Real energy in reverse direction
MWh
0
10000
unsigned long
32
0
90
424110
Reactive energy in normal direction
Mvarh
0
10000
unsigned long
32
0
94
424112
Reactive energy in reverse direction
Mvarh
0
10000
unsigned long
32
0
98
424114
Demand of the power factor
PF
600
1000
signed int
16
0.001
100
424115
Power factor in Phase L1
PF
600
1000
signed int
16
0.001
102
424116
Power factor in Phase L2
PF
600
1000
signed int
16
0.001
104
424117
Power factor in Phase L3
PF
600
1000
signed int
16
0.001
106
424118
Frequency
Hz
1500
44000
unsigned int
16
0.01
108
424119
THD of the current
%
1
100
unsigned char
8
0
109
--
THD of the voltages
%
1
100
unsigned char
8
0
110
424120
Form factor
0
0
255
unsigned char
8
0.1
111
--
Crest factor
0
0
255
unsigned char
8
0.1
112
424121
Reserved
-
-
-
-
16
-
114
424122
Temperature in the cubicle
(detected in the COM16)
°C
-127
128
unsigned char
8
0
115
--
Temperature in the circuit breaker
(detected in BSS)
°C
-20
85
unsigned char
8
0
Bit Mapping for Breaker Status Register 413158
Byte
Register
Description
0
Bit 0
Breaker Open
0
Bit 1
Breaker Closed
0
Bit 2
Breaker Tripped (mechanical trip indication)
0
Bit 3
Breaker is ready to close
0
Bit 4
Storage spring is charged
0
Bit 5
1st auxillary release is operated
0
Bit 6
2nd auxillary release is operated
3/15
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 3
1/28/05
1:10 PM
Page 17
Communication-capable Circuit Breakers
WL Circuit Breaker
WL Configurator Brief Description
WL Configuration software,
WL Config©, is a software
configuration tool used to set
protective settings, set points
and additional protective
functions in the WL trip unit.
It is designed for use on a
Windows 2000 or XP PC with a
minimum of 128MB RAM and a
1.2GHz or faster processor. The
installation is a simple and
intuitive process, with step-bystep instructions for the user.
WL Config runs in a web browser
window, with the "Main Menu" tree
below displayed at start-up:
After the program is installed on the
PC, WL Config© communicates with
WL Trip Units via the PC’s serial port.
The COM16 MODBUS communication
module is required for use with this
software. An RS485 to RS232
converter is provided as part of the
WL Config Software Kit (catalog
number: WLCONFIG). WL Config
uses the MODBUS protocol to
communicate with the COM16
(typically at 19,200 baud, even
parity and with a default MODBUS
address of 126).
The main purpose of WL Config is to
configure the communication,
protective and alarm programmable
parameters of the WL Trip Unit, and
also configure CubicleBUS Module
parameters.
The internal CubicleBUS
communications bus of the WL
Circuit Breaker allows connectivity
between the COM16, Digital I/O,
Analog I/O, and Electronic Trip Units
(ETU). CubicleBUS requires 24V DC+
power and provides a serial link to
all the modules in the WL Circuit
Breaker CubicleBUS system. 24V DC
power must be available in the
system for communication to exist
between the PC and the COM16.
The serial data generated by the
Trip Unit is available at the COM16,
which serves as a gateway to the
CubicleBUS data.
WL Config can interrogate a Trip
Unit for instantaneous or historical
data and display that information
for user evaluation. If the system is
equipped with the optional
Metering Plus module, the voltage
and current waveforms and any
harmonic information can be
viewed.
The parameters changed by the
user and sent to the device are
verified by the PC program and the
device for a valid setting, and if
out of range, an error message is
displayed. Alarms can also be
configured for any associated
I/O modules.
Note: WL Config can be also used
in an offline mode, without a WL
Trip Unit attached, to allow the
configuration of a particular job
to be completed and verified prior
to downloading. This offers the
advantages of quickly configuring
many trip units with the same
data and also provides organized
electronic files for storing past
configurations.
3/16
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 3
1/28/05
1:10 PM
Page 18
Communication-capable Circuit Breakers
WL Circuit Breaker
Notes
3/17
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 4
1/28/05
1:14 PM
Page 1
Breaker Data Adapter (BDA)
Breaker Data Adapter Plus (BDA Plus)
Short Description of the BDA/BDA Plus
System Requirements
Connect the BDA/BDA Plus to the WL Circuit Breaker
Communication via the Serial Interface
Communication via the Ethernet Interface
Operating Instructions
Troubleshooting
WL MODBUS Communication and Electronic Accessories • January 2005
4
WL UL 489_Com-section 4
1/28/05
1:14 PM
Page 2
Breaker Data Adapter (BDA)
WL Circuit Breaker
Brief Description and System Requirements
The Breaker Data Adapter (BDA)
is the first circuit breaker
parameterization device to
feature an integrated webserver
for parameterization, monitoring
and diagnostics. The BDA Plus
also features an Ethernet
interface for connection to the
Ethernet, Intranet or Internet.
Description
The BDA can be used to read and
change the parameters of WL Circuit
Breakers, display measured values, as
well as visualize, analyze and store
diagnostic data.
It is comprised of a microcomputer
on which an embedded Linux
operating system featuring a web
server application runs. The HTML
pages and the Java program codes
are stored in the internal flash and
can be displayed on a browser. The
browser itself displays the HTML
pages, while the more complex
functions are implemented using Java
applets. A Java Virtual Machine (VM)
is required to run the Java applets.
This is available free of charge for a
wide range of browsers and
operating systems.
All the pages that can be displayed
are stored on the BDA in German and
English; the language is selected
when the data is called up in the
browser for the first time. A new
language can be selected during
operation.
CubicleBUS module. The indicator
with the browser application (e.g.
laptop) is connected to the BDA using
a null modem cable.
The Breaker Data Adapter Plus
features an additional Ethernet
interface, which means that the BDA
Plus can also be addressed via the
Intranet or Internet. The
communication options available via
the Intranet or Internet are restricted
only by the network administration.
All write actions (changing
parameters or switching actions) are
password protected.
When connected temporarily, the
BDA can be used to read and change
parameters, perform diagnoses, or
display measured values. For this
reason, a magnet is supplied with the
BDA so that it can be attached to
doors and other elements containing
iron. The DIN rail installation kit
supplied can be used to connect the
BDA permanently. Depending on the
application, the BDA Plus is normally
used for a permanent connection. In
this way, it can be accessed via the
Ethernet, Intranet or Internet.
Benefits of the BDA:
• No special software has to be
installed; the display software is
supplied with the circuit breaker
data directly from the BDA. The
appropriate help pages are also
stored directly in the BDA, which
means they are always available
when they are needed.
• The comprehensive use of Java
technology ensures the systems can
operate regardless of the operating
system. This means that the BDA
can be used with all Windows
versions, Linux, and all other
operating systems provided by the
corresponding Java Virtual
Machine.
• Smaller hand-held devices with
PocketPC as the operating system
can also be used, as can PCs or
notebooks, provided they fulfill the
system requirements.
If the WL is to be switched open or
closed via the BDA, the MODBUS
COM16 module must also be
installed. This contains the
connections for activating the
opening and closing solenoids and
the motorized drive.
The MODBUS communication
function does not have to be
enabled at this point.
The cable supplied is used to connect
the BDA to the WL Circuit Breaker.
The BDA can either be connected
directly to the trip unit or to the last
4/1
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 4
1/28/05
1:14 PM
Page 3
Breaker Data Adapter (BDA)
WL Circuit Breaker
BDA in Offline Mode (or BDA Plus)
In offline mode, the BDA or BDA
Plus is only connected to a laptop
(represents all input/output
devices). All the required
parameters can be set in this
operating mode and saved for later
use (download to the circuitbreakers). No power is supplied via
the laptop COM interface, which
means that an additional power
supply unit (24V DC) must be
connected to the BDA.
BDA as a Hand-Held Device (or
BDA Plus)
As a hand-held device, the BDA
is operated by connecting it
temporarily to the appropriate
WL trip unit interface.
Graphic 4-1 The BDA must be supplied externally with 24V DC. Parameters can be set, stored,
and printed out.
All circuit breakers in a system can
be parameterized one after the
other using just one BDA, and the
parameter data saved to a laptop for
further processing. In addition, all
the diagnostic data of the circuit
breaker can be read via the BDA.
An additional 24V DC power supply
is required if the circuit breaker is
not yet supplied with power (e.g.
by means of an external 24V DC
source on the CubicleBUS).
Graphic 4-2 In temporary mode, the BDA is normally attached using magnets.
4/2
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 4
1/28/05
1:14 PM
Page 4
Breaker Data Adapter (BDA)
WL Circuit Breaker
BDA Plus as an Ethernet Interface
In addition to the previously
mentioned functions, the BDA Plus
enables data to be accessed via the
Ethernet. In this case, the circuit
breaker data is not transmitted as net
data, but displayed on HTML pages in
an application-specific format. The
BDA/BDA Plus cannot be used to
integrate the circuit breakers in
higher level visualization systems.
To display several WL Circuit Breakers
around the clock online using the
communication system in a
switchgear unit without the MODBUS
module, one BDA Plus
is required for each circuit breaker. In
this case, the circuit breaker is
selected by entering the BDA-specific
IP address in the browser. Password
protection in the BDA and BDA Plus
prevents unauthorized access.
By making the appropriate settings
on any firewall, WL Circuit Breakers
can also be accessed via
the Intranet and Internet.
Graphic 4-3 Depending on the network settings (routing tables and firewall entries),
the circuit breaker can be diagnosed by all PCs with an Internet connection.
4/3
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 4
1/28/05
1:14 PM
Page 5
Breaker Data Adapter (BDA)
WL Circuit Breaker
System Requirements
Certain prerequisites have to be
fulfilled before the BDA or BDA Plus
can be operated. One of the two
standard browsers (Internet
Explorer V5.5 or higher or Netscape
Navigator V6.2 or higher) must be
installed on the output device (e.g.
laptop). Compatibility with other
browsers cannot be guaranteed.
To ensure independence between
the operating systems and
browsers, all the pages have been
written in HTML code and Java
applets. A Java Virtual Machine is
required to display the pages.
What is Java?
Java is a platform-neutral objectoriented programming language
originally developed by Sun
Microsystems. Java is implemented
in all IT areas of the commercial,
industrial and administrative
sectors, and is available free of
charge for many operating systems
and platforms – from cell phones to
real-time mainframe systems.
Unlike most compiler languages,
Java applets are not directly
translated into a set of commands
that can be understood by a "Real
Processor". Instead, they are first
converted to the "Java Byte Code".
Although this byte code is highly
machine-oriented, a "Java Virtual
Machine" (VM), which emulates a
standardized processor for all Java
applets, is required on the target
computer.
Since Java normally compiles data
twice (once with the developer and
once with the user), this principle is
known as the “Just-In-Time “(JIT)
Compiler. Although, Java applets
take longer to start, since the
machine code is generated during
initialization.
However, the same Java applet
can run on all supported systems
without modifications.
The Java Virtual Machine V2
V1.4.0_01 is required to display the
BDA pages. When these pages are
called up for the first time, the BDA
checks whether Java VM2 is
available on the browser. If not, the
system automatically displays a
window informing the user of this
and automatically links the user to
the appropriate Sun Microsystems
page. An Internet connection must
be established to ensure the
automatic installation procedure
functions properly. If this is not the
case, the Virtual Machine required
for the Microsoft Windows
operating systems can be
downloaded from the following
address:
Circuit breaker requirements
The BDA can be connected to WL
Circuit Breakers with the following
trip units: ETU745, ETU748, ETU755
and ETU776. It can be connected
either directly to the trip unit or to
the last external CubicleBUS
module. Circuit breakers can also
communicate with the BDA if they
have been retrofitted with the
communication function.
Getting started with the BDA Plus
If the BDA Plus is is being installed
for the first time, the settings for
the IP address and the standard
gateway as well as the subnet mask
must be set using the serial
communication via RS232. After
this the BDA Plus must be rebooted
to load the Ethernet driver with the
specified parameters.
http://java.sun.com/products/archive
/j2se/1.4.0_01/index.html
Once installed, the option Java 2VM
V1.4.0_01 must be activated in the
browser (if it is not already).
To avoid conflicts with other Java
versions, it is recommended that
you uninstall older versions of Java
and delete the cache in the browser.
The target system with the browser
also requires one or both of the
following communication
interfaces:
• A serial interface with RS232
design, usually integrated on
standard PCs (e.g. COM1)
for point-to-point (PPP)
communication with the BDA.
• A LAN interface for
communicating with the BDA Plus
via the Ethernet.
4/4
WL MODBUS Communication and Electronic Accessories • January 2005
WL UL 489_Com-section 4
1/28/05
1:14 PM
Page 6
Breaker Data Adapter (BDA)
WL Circuit Breaker
Connection to WL Circuit Breakers
To operate the BDA, it must be
Permanent
connected to the target system
The trip unit interface through the
front connection is not suitable if a
BDA or BDA Plus is to be permanently
connected to a WL Circuit Breaker.
The connection on the last
CubicleBUS module, such as the
COM16 module, or one of the other
modules, is more suitable. In this
case, a cable is supplied with the BDA
that can be connected directly
to the RJ45 plug-in contact of the
CubicleBUS module. Typically,
(e.g. a PC) on one side and a
circuit breaker on the other.
Different scenarios are possible
depending on the application.
For WL Circuit Breakers, two basic
methods are available for connecting
the BDA, temporary of permanent
installation.
a BDA Plus is used for permanent
installation. The DIN rail installation
kit supplied is used to secure the
device.
The principle regarding the power
supply is the same as for temporary
operation: if the CubicleBUS is
supplied with power, the BDA will
also operate without an extra power
supply unit. Otherwise, the BDA
must also be connected to a 24V DC
power supply unit.
Temporary
If the BDA is to be used as a local
parameterization tool and several
circuit breakers are to be set in
succession, the local front interface
of the trip unit can be used. The
cable required is supplied with the
BDA. An additional 24V DC power
supply unit is also required if the
circuit breaker is not yet supplied
with power via the CubicleBUS. For
this purpose, a voltage connection is
located on the top of the BDA next to
the interface to the circuit breaker.
In temporary mode, the BDA can be
quickly secured to any switchgear
cubicle using magnets on the back.
Note: Do not use temporary
magnetic installation for BDA where
it can fall into energized parts.
Figure 4-1 The physical BDA interfaces. The connection to the circuit breaker and optional power
supply are on the top, while the RS232 interface (or the Ethernet interface in the case of BDA Plus)
and the RESET button are on the bottom.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Operation
As a microcomputer, the BDA is
booted in the same way as a PC.
This takes approximately 40 seconds
and is started automatically when
the power supply is switched on.
During this time, the content is
loaded from the Flash memory to
the main memory, an internal self
test is carried out, the operating
system (embedded Linux) is booted,
and the web server application
started.
The RESET button on the underside
enables the BDA to be restarted
manually at any time.
The LEDs indicate the operating
status during the boot-up process.
The upper DEVICE LED is first
red/green, while the lower
CubicleBUS LED is red only. After
about 10 seconds, this also changes
to red/green. During the load
process, the Ethernet connection is
checked for a connected network.
Only then is the appropriate driver
loaded. Since the BDA Plus is to be
operated with an Ethernet
connection, a physical connection
to the Ethernet must already exist
during the boot-up process.
Figure 4-2 For temporary operation, the BDA can be connected to the local interface of the trip unit.
In this configuration, only the RS232 connection to the PC is typically used.
Meaning of the LEDs on the BDA
Display Meaning
LED
DEVICE
CubicleBUS
red
BDA out of order
green
BDA in operation
red/
green
BDA booting up
red
BDA in online
mode and
connection to
circuit breaker
interrupted
green
Connection
exists to
CubicleBUS
red/
green
BDA booting up
off
BDA in offline
mode, even if
circuit breaker
is connected
Table 4-1 The LEDs on the BDA indicate the
Figure 4-3 In a permanent installation, the BDA should be connected to the last external
CubicleBUS module. It can be secured using a DIN rail, as shown above.
current operating status.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
When the boot-up process is
complete, the DEVICE LED switches to
green, while the CubicleBUS LED
switches to green or is extinguished,
depending on the connection.
If the BDA is not supplied power via
the CubicleBUS of the WL, it must be
activated via an external 24V DC
power supply. Siemens SITOP
24V DC power supplies are suitable
for this purpose.
Other 24V DC power supply units
that supply the required power can
also be used.
Technical data for the BDA and BDA Plus
Min./Max. operating voltage
19.2V / 28.8V
Current input from the CubicleBUS or power supply
unit min./max.
100mA / 300mA
Power loss min. / typ. /max.
3W / 5W / 7W
Dimensions W/H/D
82mm /153mm / 38mm
Weight
0.38 kg
Operating temperature range
0 to 55°C
Figure 4-4 This table provides technical data for the BDA and BDA Plus
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Connection to the BDA via the Serial Communication System
To operate the BDA, it must be
connected to the target system
(e.g. a PC) on one side and a
circuit breaker on the other. A
range of options are available,
depending on the application
and operating system.
To ensure that serial communication
is possible between the target
system and the BDA, you should
carry out the following steps:
• Connect the BDA to the circuit
breaker and power supply.
• Connect the BDA to the COM
interface of the target system
(e.g. PC) using a fully assigned
null modem cable. Note: With a
null modem cable, pins 2 and 3, 4
and 6, and 7 and 8 must be
assigned and reversed with
respect to each other.
The COM port cannot be used
by a different application.
• Installing a standard modem.
Once the physical connection has
been established using a null
modem cable, a standard modem
must be installed on each PC.
The procedure for installing the
modem varies slightly depending
on the operating system. The
screenshots on the following
pages provide a step-by-step guide
to the procedure. The standard
modem to be selected - 28800
bps - is not related to the actual
transmission rate. The examples
illustrate the connection to the
COM1 interface; other interfaces
must be set accordingly. The
installation process always begins
in the Control Panel of the
operating system. The default
settings in the "Properties"
windows of the modem do not
usually have to be changed. They
are shown as a reference.
The screenshots on the following
pages for Windows98 are identical
for Windows95, WindowsNT, and
WindowsME. WindowsXP screens
are virtually the same as those in
Windows2000.
• Installing a data communications
connection.
Once a standard modem has been
installed, a communications link
must be established via this
modem. To do so, a data
communications connection must
be set up via "Workstation > Data
Communications Network". Once
the appropriate modem has been
selected, the maximum rate has to
be selected again. The name of
the connection is user defined,
while the user name must be
"ppp" and the address signal
"555". A preselection code and
password must not be entered. All
of these settings are shown on the
following pages. Windows98
screenshots are used to represent
the operating systems
Windows95, Windows98;
WindowsNT, and WindowsME.
Only the screenshots from
WindowsXP are used for
Windows2000 and WindowsXP.
• Establishing the connection.
A communications link is
established by activating the
installed data communications
connection. Once the user name
and password have been checked
(a password must not be entered),
the window for establishing the
connection disappears from the
Windows systray. The systray is
the area on the bottom right next
to the system clock in the toolbar.
A small icon with two computers
appears here. Double-clicking this
opens a window displaying the
properties of this connection. A
test ping can also be used to
check that the connection has
been established correctly. Once
you have opened the entry screen
(Start > Execute) and entered
"ping 2.2.2.1", a DOS box appears
that displays either "Reply from
2.2.2.1 after..." (connection OK)
or "Reply timed out" (connection
not available).
• Start the browser (Internet
Explorer or Netscape Navigator)
• Entering the target IP address
2.2.2.1.
You have to enter 2.2.2.1 in the
address line. The usual "http://"
does not have to be entered.
When you press ENTER, the pages
will be loaded from the BDA.
Note: You may have to include the
address 2.2.2.1 in the list of
addresses that do not use a proxy
server. The use of a proxy server is
optional and depends on the
network.
A desktop link can be created if the
BDA connection is used frequently.
To create an Internet Explorer link
with the local IP address of the BDA
on the desktop, you have to drag
the Internet Explorer icon in the
address line to the left of the
address to the desktop.
Alternatively, the BDA start icon can
be used. To do so, press the left
mouse button to save it on the hard
disk as a bitmap and specify it as an
icon in the properties window of
the link saved on the desktop.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-5 Installing a standard modem with Windows98, part 1 (identical to Windows95, WindowsNT and WindowsME):
A standard modem (28800 bps) is selected and installed in the Control Panel. The automatic identification function must be switched off
for this purpose.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-6 Installing a standard modem with Windows98, part 2 (identical to Windows95, WindowsNT and WindowsME):
Once you have installed the standard modem, you have to set it to the maximum rate of 115200; the default settings in the other windows
are retained.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-7 Installing a data communications connection to the BDA with Windows98, part 1 (identical to Windows95 and WindowsME):
You now have to establish a data communications connection to the BDA. To do so, double-click "Establish New Connection" in the Control Panel
and then maintain the windows as shown.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-8 Installing a data comm. connection to the BDA with Windows98, part 2 (identical to Windows95 and WindowsME):
Once communication has been established, the connection window disappears from the Windows systray. To display the BDA pages,
enter address 2.2.2.1 in the browser. To call up the connection window, double-click the relevant icon in the systray.
Figure 4-9 Installing a standard modem with Windows2000, part 1 (identical to WindowsXP):
To install a standard modem in WindowsXP, double-click the "Telephone and Modem Options" icon in the Control Panel.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-10 Installing a standard modem with Windows2000, part 2 (identical to WindowsXP):
Select the standard modem (28800) and assign it to a free COM interface.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-11 Installing a standard modem with Windows2000, part 3 (identical to WindowsXP):
After installation, you have to set the maximum rate to 115200. This completes the installation procedure.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-12 Setting up a data communications connection to the BDA with WindowsXP, part 1:
Go from the Control Panel to "Network Environments" and click "Establish New Connection", as shown above. Then follow the instructions provided
by the Installation Wizard.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-13 Setting up a data communications connection to the BDA with WindowsXP, part 2:
Continue following the instructions and maintain the windows as shown above.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-14 Setting up a data communications connection to the BDA with WindowsXP, part 3:
Once the data communications connection has been successfully set up, WindowsXP establishes a connection with the BDA when you click "Dial".
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-15 Setting up a data communications connection to the BDA with WindowsXP, part 4:
Once the connection has been established, start the browser and enter the address 2.2.2.1. To display the connection properties
so that you can check them, double-click the appropriate icon in the systray.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-16 Setting a data communications connection to the BDA with Windows2000, part 1 (similar to WindowsNT):
A modem is installed for Windows2000 in the same way as for WindowsXP. You then have to set up the data communications connection to the BDA.
To do so, proceed as shown in the screenshots.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-17 Setting up a data communications connection to the BDA with Windows2000, part 2 (similar to WindowsNT):
The procedure for setting up the data communications connection for WindowsNT is largely the same as the example shown above for Windows2000.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-18 Setting up a data communications connection to the BDA with Windows2000, part 3 (similar to WindowsNT):
Once the installation is complete and the connection has been established via the null modem cable, start the browser by entering
the address 2.2.2.1. The PC temporarily adopts the address 2.2.2.2.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Connection to the BDA Plus via the Ethernet Interface
In addition to communication
via the serial RS232 channel, the
BDA Plus features an Ethernet
interface. If the BDA Plus is to be
addressed via this interface, it
must be integrated in the local
Ethernet (LAN). This chapter
explains a number of key terms
and settings.
Ethernet
Unlike the MODBUS, Ethernet does
not function according to a masterslave principle. All the stations have
equal priority on the bus, which
means that any station can be
the sender and/or receiver.
A sender can only send on the bus if
no other station is sending at that
point. This is due to the fact that
the stations are always "listening in"
to find out whether any messages
are being sent to them or any
senders are currently active.
If a sender has started sending, it
checks that the message it has sent
is not corrupt. If the message is not
corrupt, the send operation
continues. If the sender detects that
its data is corrupt, it must abort the
send operation because a different
sender has already started sending
data.
After a random time has elapsed,
the sender restarts the send
operation. This is known as
CSMA/CD and, because it is a
“random” access procedure, does
not guarantee a response within
a certain time frame. This largely
depends on the bus load, which
means that real-time applications
cannot yet be implemented with
Ethernet.
Definition of Key Terms
An Intranet system is comprised of
several Ethernet lines connected to
each other via gateways within a
company. The structure of an
Intranet system can be just as
diverse as that of the Internet:
it can be restricted to one location
or distributed worldwide.
Ethernet/Intranet lines are
connected to each other using
repeaters, bridges/switches, routers
and gateways. These modules work
at different levels in the ISO/OSI
7-layer model.
The repeater (or star coupler) only
regenerates and strengthens the
electrical signal; it does not
interpret bits. The bridge (or switch)
physically separates the networks
and performs fault and load
disconnection. Filtering and
guidance mechanisms are usually
implemented. The router decouples
the networks at the logical level
(protocol level) by means of the
specified addresses. Using routing
tables, it knows which messages
are to be sent to which address. It
continues to work, however, on a
protocol-dependent basis. The
gateway also enables the router to
convert services.
This means that it can act as a
security mechanism, such as a
firewall, while functioning as a
proxy.
A proxy is a program in a gateway
that acts as both the server and
client. It processes requests,
translates them if necessary, and
forwards them to the addressees.
Proxies are also used to control
access (firewall) and forward
requests for protocols that are not
supported. Intranet users in
particular are familiar with the
Internet/Intranet page caching
function offered by proxies.
The Intranet is connected to the
Internet via a company proxy, which
can also act as a firewall. If a PC
(user) wants to access an area of
the Intranet from the Internet, the
firewall must be informed of which
addresses can be accessed from
outside.
Graphic 4-5 This diagram illustrates the structure of an Ethernet, how an intranet is integrated,
and how this is connected to the Internet.
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Breaker Data Adapter (BDA)
WL Circuit Breaker
IP Addresses
Subnet Mask
Gateway IP Address
The partner must have a unique
address so that it can be addressed
in the extensive Intranet/Internet
system. The IP address format is
used for this purpose, which, as of
Version 4, comprises four figures
from 0 to 255, separated by a
decimal point. Example:
146.254.245.62
The subnet mask provides
information on the size of the
subnetwork (Intranet) and its
address band. In this way, each
station knows whether the IP
address to be addressed is located
in the same subnetwork or whether
it has to be addressed via a
gateway.
If an address that is not located in
the subnetwork is addressed in the
browser, the request is forwarded to
the gateway. The gateway knows
the location to which the request
has to be forwarded on account of
the configuration. The IP address of
the gateway must be obtained from
the network administrator.
The address is 32 bits long. Three
classes have been created to enable
the addresses to be structured on a
world-wide basis and to ensure that
the same address does not exist
twice. The IP address is comprised of
a small header, which describes the
class, a network number, and a host
number. The address of a
subnetwork (Intranet, for example) is
encoded in the network number. The
host number is basically the unique
address of a station in a network of
class X and subnetwork Y.
Example:
If 0.0.0.0 is set as the gateway IP
address, no access to a gateway has
been configured.
The first byte of class A IP addresses
contains a number from 0 to 127:
e.g. 98.x.x.x. This class can support
up to 128 subnetworks, each with
around 16 million connections.
Since class A networks are very
limited in number, these addresses
are only available for large global
companies and organizations. A
Network Information Center (NIC) is
responsible for assigning the classes
and network numbers.
Class B networks (these begin with
128.x.x.x to 191.x.x.x) support up
to 16,384 subnetworks, each with
up to 65,535 stations. The majority
of large companies and providers
have a class B address.
IP address 1st BDA: 206.150.100.89
IP address 2nd BDA:
206.150.102.32
Operation
IP address gateway: 206.150.100.1
IP address browser: 206.150.100.50
Subnet mask: 255.255.255.0
Subnet mask 255.255.255.0 means
that all addresses whose first three
bytes are the same as the station
address are located on the line of
that station. These can be
addressed directly (in the example
above, from the browser of the first
BDA). A comparison of the address
of the second BDA with the subnet
mask shows that this address is not
on the same line as the station. This
means that the gateway must be
addressed, via which the request is
then forwarded to the second BDA.
The subnet mask is usually
255.255.255.0.
BDA IP Address
The BDA must be assigned its own
unique IP address that has not been
used before so that it can run on
the Ethernet. This address must be
in the same range as the other
addresses on this line.
Once the addresses have been set,
it should be possible to call up the
BDA Plus via the Ethernet. This can
be checked using a test ping. To do
so, enter "ping x.x.x.x" in Start >
Execute (x.x.x.x is the placeholder
for the IP address of the BDA to be
addressed). The DOS box that then
appears tells you either that a reply
from the "pinged" IP address is
received, or that the request has
been timed out. In this case, no
connection has yet been established
from the BDA Plus to the target
system.
Note: You may have to include the
IP address of the BDA Plus in the list
of addresses that do not use a proxy
server. The use of a proxy server is
optional and depends on the
network.
Once a connection has been
established, start the browser and
enter the IP address of the BDA Plus
in the address line.
With around 2.1 million
subnetworks, each with up to 256
stations, class C addresses are often
used by smaller providers and
companies with no more than 256
connections in their corporate
network. The IP addresses start from
192.x.x.x to 223.x.x.x
1/2
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Operating Instructions and Troubleshooting
The BDA supports state-of-the-
Online mode
art communications technology.
Online mode is activated
automatically when the BDA is
connected to a circuit breaker. In
this mode, the current operating
and diagnostic data, as well as the
parameters are displayed and
loaded directly to the circuit breaker
after they have been changed.
Online mode is indicated by a green
CubicleBUS LED.
It can be implemented
regardless of the operating
system and browser used.
The instructions provided
here, show you how to
make particular settings.
A troubleshooting table is
included at the end to help
you solve any problems.
If the connection to the circuit
breaker is interrupted, the BDA
switches to offline mode. This also
occurs if a file has been opened
under "Parameter Transfer" or
received from the circuit breaker.
Languages and Help
Offline mode
The BDA interface is in German and
English. The language is selected
every time the browser is started.
If the BDA is supplied with 24V DC
and is not connected to a circuit
breaker, the BDA starts in Offline
mode, indicated by the CubicleBUS
LED not illuminated. Offline mode is
used to configure the BDA even if it
is not connected to a circuit breaker,
and save this file for later use.
In addition to the HTML pages and
Java applets, the BDA stores the
accompanying help pages in
different languages. The help pages
can be called up where they are
available via the question mark icon
in the top right-hand corner of the
screen. They are available whenever
the BDA is activated. The help pages
are available in German and English.
whether it is available, or readable
and/or writable. The display then
changes depending on the
property byte.
If a value is not available, for
example, because the circuit
breaker does not have any neutral
conductor protection (N-conductor
protection parameter), it is
displayed as an empty white
field with no outline.
If a value is available, the system
differentiates between whether it is
only readable or also writable. "Read
Only" data is displayed in black on a
gray background in a black, outlined
field. If the value is also writable,
the background is white.
Values that are available but not
currently valid are displayed in red.
This could be the case, for
example, if the number of
measured values available for
calculating the long-term values
of the current is insufficient
because the circuit breaker has
just been closed.
To switch from Offline to Online
mode, first connect a circuit
breaker. You then press either the
"Online" or "Send Parameters"
button in "Parameter Transfer".
Offline/Online Mode
Displaying Data
The BDA (and BDA Plus) can be run
in two different operating modes.
WL Circuit Breakers use "Property
Bytes", which provide information
on the required value, such as
Figure 4-19 The way data is displayed on the BDA pages depends on the property byte.
This tells you which data is read only, which data can be written, and which data is not available.
1/2
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Breaker Data Adapter (BDA)
WL Circuit Breaker
Password Protection
Operation Example
Comparing Parameters
All write actions that would result in
a change to the status or a parameter
in the circuit breaker are password
protected. This ensures that
parameters cannot be changed and
switching is impossible without this
password.
This example describes the
functionality of the BDA. If you want
to set the MODBUS address of the
COM16 module for a WL Circuit
Breaker, open the Communication
node by choosing "Device Parameters
> Circuit Breaker". Then click the
input/output field next to the
MODBUS address and edit it with
the new address. Once you have
changed this parameter and exited
the field, the outline turns blue to
indicate parameters that have not
yet been transferred to the circuit
breaker.
The parameter comparison function
is used to check whether the
parameters set in WL Config or the
BDA match those in the device. The
following parameters are checked:
You can then change other
parameters. If you want to transfer
the modified parameters to the
circuit breaker, click OK on this page.
The parameter comparison function
can be used, for example, to ensure
that the set parameters are
transferred without any errors once
they have been downloaded to the
device.
Note: The electronic relays of the
COM16 module are required to open
and close the WL via the BDA.
The default password is
"sentron"
This can be changed by choosing
"Extras > Password" in the BDA tree
(recommended). You have to enter
the new password twice. When you
click OK, the BDA asks you for the old
password.
If you have forgotten it, it can be
reset by means of a master password.
To do so, contact Technical Assistance
at 1-800-964-4114
seainfo@sea.siemens.com
If the parameter transfer process is
the first write action in this session,
the system prompts you to enter the
password. Once you have entered the
password successfully, the data is
transmitted to the circuit breaker.
If you want to reset the modified
parameters, click the "Undo" button.
If you exit the parameters page
without clicking OK, the changes are
ignored.
Printing
Since Java applets are used, the
normal print function in your browser
on the parameter pages will not
provide a satisfactory printout.
If you want to print the parameters
for documentation purposes, open
the pages to be printed from the tree
in the BDA. All the parameter pages
are displayed again under "Extras >
Print", and you can print them
individually as required using the
print menu in your browser.
• Protection parameters A and B
• Extended protection function
parameters
• Threshold value settings
• Measurement function settings
• Communication parameters
• Settings for the configurable output
module
It is not possible to determine
whether the parameters and settings
loaded to the device have actually
been transferred. This is because,
for example:
• BDA just forwards parameter
changes. Whether a parameter is
correct can only be verified in the
memory location (e.g. in the trip
unit). If this changes the value
because one has exceeded the
maximum value, for example, the
modified value is reported back to
the BDA. This discrepancy would be
detected when a subsequent
parameter comparison is
performed.
• In the BDA interface, not all values
regarding the differences between
minimum/maximum values and
other parameters are checked. This
means that a parameter could be
entered that cannot be copied in
the trip unit in its current form.
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Page 2
Communication-capable Circuit Breakers
Breaker Data Adapter (BDA)
WL Circuit Breaker
WL Circuit Breaker
Technological Leader Among Circuit Breakers: WL Communication
Troubleshooting List
Fault Description
Ensure that you are using a fully-assigned null modem cable.
With a null modem cable, pins 2 and 3, 4 and 6, and 7 and 8
must be assigned and reversed with respect to each other.
Connection Diagram
1 Breaker Data Adapter
(BDA)
13
13
An error message appears (e.g. Modem
not initialized, etc.) a PPP connection is
established with the BDA.
2 Browser-capable input
and output device
(e.g. notebook)
4 COM16 MODBUS
module or COM 15
PROFIBUS module
Ensure that the option "Use Java v1.4.0 <applet>" is active
in the browser.
(BSS)
6 Electronic Trip Unit
7 Metering function PLUS
8
9
10
11
12
Delete the cache memory of the browser.
15
14
Nothing happens after you select the language on the first page.
Interlocking (ZSI) module
9 Digital output module
10 Digital output module
4
2
5
1
6
12 Digital input module
13 WinPM.Net on PC
14 PLC (e.g. SIMATIC S7)
Open the Java plug-in operator panel in the Control Panel. Check that
the plug-in is active and Version 1.4.0 is selected under "Extended".
On the "Browser" tab page, the browser that you are using must be
active, and the Java VM cache can be deleted.
Then restart the system.
3
If the problem persists, remove any older versions of Java you
may have.
7
with relay or optocoupler
outputs, remotely
configurable
11 Analog output module
The COM port that you are using on the target system must not be
used by a different application.
In the Control Panel, you also have to set the baud rate for the COM
interface that you are using to 115200.
5 Breaker Status Sensor
with relay or optocoupler
outputs
Before starting the BDA, disconnect the null modem cable from
the BDA and reboot the BDA (DEVICE LED is green). Then reconnect
the cable.
Check the modem and data communications connection settings. You
must choose "555". Only the user name "ppp" works.
3 WL Circuit Breaker
8 Zone Selective
Solution
Check the settings for the gateway, the subnet mask, and the proxy.
Enter the address of the BDA to be addressed in the proxy so that
it is not routed via the proxy. This only works if the BDA is located
in the network specified by the subnet mask.
* The Siemens BDA Plus or meters, 9330, 9350, 95/9600
can be used as a gateway to enable Ethernet communication
to the WL Circuit Breaker.
The 9500 meter can also be used as a central display unit
for multiple WL breakers with metering capability.
You cannot establish a connection to the
BDA Plus via the Ethernet.
15 BDA Plus
Ping the BDA address to check whether TCP/IP communication is
established to the BDA. If the ping does not work, check the network
configuration again with your network administrator. If the BDA replies
to a ping but not to a request to call up the browser, reset the BDA.
The BDA must have already been booted with a connected Ethernet
cable so that the Ethernet interface is activated. To solve the problem,
connect the active Ethernet cable and boot up the BDA.
The system displays a message about
security settings and the BDA pages
stop loading.
The security level of the browser is set to "Secure" and stops Java
applets from running, for example. For this reason, you have to reduce
the security level to a level where the security message no longer
appears and the BDA pages are displayed.
Table 4-3 This troubleshooting list helps you solve any problems you may encounter communicating with the BDA. If you have any other problems,
Technical Assistance at 1-800-964-4114 will be happy to help.
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WL MODBUS Communication and Electronic Accessories • January 2005
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Page 1
WL Trip Unit, MODBUS Communication
and Electronic Accessories Application
Guide
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RELIABLE SOLUTIONS
Siemens Energy & Automation, Inc.
3333 Old Milton Parkway
Alpharetta, GA 30005
1-800-964-4114
seainfo@sea.siemens.com
www.sea.siemens.com/power
© 2005 Siemens Energy & Automation, Inc. All Rights Reserved
Siemens is a registered trademark of Siemens AG. Product names mentioned may be trademarks or registered trademarks of their respective
companies. Specifications are subject to change without notice.
Order # CBTA-01000-1004 2.5M305CEG Printed in USA
WL Low Voltage Power
Circuit Breaker
ANSI / UL1066 & UL 489
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