Siemens 4300 Power Meter Operator's Manual

4300 Power Meter
Operator’s Manual
Manual No. SGIM-6038E
The use of unauthorized parts in the repair of the equipment or tampering by unqualified personnel will result in dangerous conditions
which will cause severe personal injury or equipment damage. Follow all safety instructions contained herein.
IMPORTANT
The information contained herein is general in nature and not
intended for specific application purposes. It does not relieve the
user of responsibility to use sound practices in application, installation, operation, and maintenance of the equipment purchased. Siemens reserves the right to make changes at any time without notice
or obligations. Should a conflict arise between the general information contained in this publication and the contents of drawings or
supplementary material, or both, the latter shall take precedence.
QUALIFIED PERSON
For the purposes of this manual, a qualified person is one who is
familiar with the installation, construction, or operation of the equipment and the hazards involved. In addition, that person has the following qualifications:
(a) is trained and authorized to 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 shields,
flash clothing, etc., in accordance with established safety procedures.
(c) is trained in rendering first aid.
SUMMARY
These instructions do not purport to cover all details or variations in equipment, nor to provide for every possible contingencyto
be met in connection with installation, operation, or maintenance. Should further information be desired or should particular
problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to the local sales
office.
The contents of the instruction manual shall not become part of or modify any prior or existing aggreement, commitment or
relationship. The sales contract contains the entire obligation of Siemens Power Transmission & Distribution, LLC. The warranty
contained in the contract between parties is the sole warranty of Siemens Power Transmission & Distribution, LLC. Any statements contained herein do not create new warranties or modify the existing warranty.
Table of Contents
1
2
Introduction ...............................................1
1.1
Quick and Easy Installation .............................. 1
1.2
Measurement Functions and Displays ............. 2
1.3
Local Programmability ..................................... 2
1.4
Communications Compatibility ........................ 2
1.5
New Feature Upgrades Made Easy ................. 2
1.6
System Applications ........................................ 2
4.3
4.4
4.5
Volts Mode .....................................................22
4.6
Communications ............................................22
4.7
Clear and Reset..............................................22
4.8
Demand Periods.............................................22
4.9
Display Contrast .............................................22
2.1
Location ........................................................... 3
4.10 Diagnostic Mode ............................................22
2.2
Mounting .......................................................... 3
2.3
Power Supply ................................................... 3
4.10.1 Version Check .....................................22
4.10.2 System Status.....................................22
2.4
Wiring ............................................................... 3
4.11 Programming Example ...................................24
2.5
5
Voltage and Current Transformer Selection ..... 3
2.5.1 VT Selection.......................................... 3
2.5.2 CT Selection ......................................... 4
2.6
Connecting Ground Terminal ........................... 5
2.7
Connecting Three-Phase Wye (Star)
Systems............................................................ 5
2.8
Connecting Three-Phase Delta Systems ....... 10
2.9
Connecting Single-Phase, Three-Wire
Systems.......................................................... 12
2.10 Communications Connections....................... 13
6
7
Demand Measurements......................... 27
5.1
Sliding-Window Demand................................27
5.2
Synchronizing Sliding-Window Demand ........27
5.3
Resetting the Real-Time Demand
Parameters .....................................................27
Communications .................................... 29
6.1
Connecting to an RS-485 Network ................29
6.2
Using Other Systems .....................................29
6.3
Updating Software .........................................29
Validation................................................. 31
2.10.1 Test Block Termination........................ 14
2.10.2 Connecting to a Computer ................. 14
7.1
Maintenance...................................................31
7.2
Calibration ......................................................31
Operator Interface ..................................15
7.3
Field Service ...................................................31
3.1
Display Mode ................................................. 15
3.1.1
3.1.2
3.1.3
3.1.4
Phase Button ...................................... 15
Phase Button Menu ............................ 15
Function Button .................................. 16
Function Button Menu ........................ 16
3.2
Polarity of Power Readings............................ 18
3.3
Programming Mode ....................................... 19
3.3.1 Cursor and Increment Buttons ........... 19
4
Voltage Inputs.................................................21
4.4.1 Direct Connection ...............................21
4.4.2 VT Connection ....................................21
Installation .................................................3
2.4.1 Electrical Connections .......................... 3
2.4.2 Communications Connection ............... 3
3
CT Primary Rating ..........................................21
Local Programming ................................21
4.1
Start Up .......................................................... 21
4.2
Password Protection ...................................... 21
4.2.1 Entering the Password........................ 21
4.2.2 Changing the Password ..................... 21
8
Troubleshooting ...................................... 33
Appendixes:
A
Technical Specifications ....................... 35
B
Mounting Dimensions ........................... 36
C
Ordering Information ............................ 38
Service Request Form
Warranty
Index
ACCESS, Isolated Multi-Drop, Power Monitor, Power Monitor PC, SEAbus, SIEServe, and WinPM are trademarks of
Siemens Energy & Automation, Inc.
Microsoft and Windows are registered trademarks of Microsoft Corporation.
Siemens Power Transmission & Distribution LLC
i
Table of Contents
ii
Siemens Power Transmission & Distribution LLC
1 Introduction
1 Introduction
1.1 Quick and Easy Installation
The 4300 power meter is a microprocessor-based, threephase power meter that provides advanced features at an
affordable price.
The 4300 power meter’s two-module design simplifies wiring
connections and reduces installation time. As illustrated in
Figure 1.1, the base module is equipped with a large, utility
approved, barrier-style terminal strip for reliable connections,
and the meter requires no transducers. You can connect current transformers (CTs) to the meter directly (via shorting
blocks), and no voltage transformers (VTs) are needed for
four-wire wye systems 347/600 V and below.
The 4300 power meter is designed as an alternative to fullfeatured digital instrumentation packages. It provides high
accuracy, high reliability, high transient surge, and hipot-withstand capabilities. Voltage and current measurements are
true rms, including harmonics.
The 4300 power meter replaces standard analog meters and
selector switches, and its unique two-module design simplifies wiring and reduces installation time. This design makes
the meter ideally suited for economical metering on threephase industrial and commercial switchboards and switchgear.
A communications port lets you use the 4300 power meter
as a stand-alone power monitoring station or as one element
in a large energy-management network.
The meter’s base module mounts directly to a switchgear
panel, and the display module mounts in ANSI C39.1 cutouts. This arrangement simplifies the replacement of existing
analog meters. A single plug-in cable connects the two modules, permitting you to mount the base module inside a
switchgear cabinet. (No switches or additional wiring is
required on the panel door.) If you ever need to remove or
replace the display module, you can do so without shutting
down the meter.
Display Module
4300
Volts RMS
Phase
Power Functions
Amps RMS
Cursor
Increment
Model:
Serial Number:
Power Supply: 95-145VAC/0.1 Amp./47-66Hz
Option*:
190-290VAC/0.05Amp./47-66Hz
Voltage Inputs: 120/277/347 VAC Nominal
Current Inputs: 5Amp. AC, 30V Maximum
*Option-Refer to Model # Listed above
Max Dielectric Test 1000 V- 1 Min 1500 V- 1 Sec
Power
Function
N
Voltage Inputs
G
Phase
V1
Can cause severe injury or
death.
More than one live circuit.
Disconnect all live circuits
before servicing.
Siemens Energy & Automation, Inc
Switchgear & Motor Control Division
Raleigh, NC USA
Made in Canada
RL
E95810
LR 57329
V3
Current Inputs
I12
I21
I22
I31
I32
RS-485
cable
Cable
Hazardous Voltage.
This equipment complies with
the requirements in part 15 of
FCC rules for a class A
computing device. Operation
of this equipment in a
residential area may cause
unacceptable interference to
radio and TV reception
requiring the operator to take
whatever steps are necessary
to correct the interference.
V2
I11
Display Cable
WARNING
L
Base Module
Figure 1.1 4300 Power Meter Modules
Siemens Power Transmission & Distribution LLC
1
1 Introduction
1.2 Measurement Functions and Displays
1.5 New Feature Upgrades Made Easy
As illustrated in Figure 1.1, the display module has a highvisibility, 20-character, liquid crystal display (LCD). Operators
use its function buttons to display measured data, including
voltage, current, power function, all three voltage phases,
and all three current phases.
The 4300 power meter is designed to maintain its position at
the forefront of developing technology through upward compatibility. An advanced system architecture supports simple
upgrades of the meter’s on-board operating software.
The 4300 power meter can be configured to operate in wye
(star), delta, or single-phase voltage modes. The meter is
equipped to monitor the following measurements:
•
Line-to-neutral voltages (Van, Vbn, Vcn)
•
Line-to-neutral average voltage (LNav)
•
Line-to-line voltages (Vab, Vbc, Vca)
•
Line-to-line average voltage (LLav)
•
Current on each phase (la, lb, lc)
•
Average current
•
KW total for all phases
•
KWH total for all phases
•
KVA total
•
KVAR total
•
KW Demand
•
MAX KW Demand
•
PF (Power Factor)
•
Frequency
If you connect the 4300 power meter to a supervisory device
that has software downloading capability, you can easily
install new features or performance enhancements via the
meter’s communications port without interrupting electrical
service. Be sure to connect each 4300 power meter to a
local RS-485 communications bus during installation so that
you can upgrade the meter’s software without disconnecting
wires or removing the unit from its installation.
1.6 System Applications
The 4300 power meter is a state-of-the-art alternative to traditional analog, electromechanical metering devices.
Because of its unique measurement, display, and communications capabilities, the 4300 power meter can be used in
any of the following applications:
•
utility installations and substation metering
•
industrial, office, and commercial buildings
•
hospitals
•
telephone exchanges
•
factories and chemical process plants
•
pulp mills and saw mills
•
large stores, shopping centers, and hotels
1.3 Local Programmability
•
co-generation systems
You can easily program the metering parameters from the
display module. A listing of these parameters appears in
Table 4.1. You can also use a portable or remotely located
PC, with the proper software, to program setup data via the
meter’s communications port. The 4300 power meter saves
all set-up data at power down, and all programming is protected by password.
•
multi-user sites for allocation of electrical costs
•
any other installation that uses significant amounts of
electrical energy
1.4 Communications Compatibility
The 4300 power meter is equipped with an optically isolated,
RS-485 communications port for displaying data on a
remote supervisory device. Examples of this device include
the Power Monitor display and monitoring unit (a standard
personal computer running the Power Monitor PC communications and supervisory software) and Microsoft® Windows®
based Siemens SIEServe™ or WinPM™ software. These
supervisory devices and programs can communicate with
the 4300 power meter, allowing it to operate in the
ACCESS™ electrical distribution communications system.
The 4300 power meter can also communicate with a host
PC as part of the ACCESS system. The 4300 Power Meter
SEAbus Plus Protocol Reference Manual (Manual No.
SG6353-01) provides a comprehensive description of the
meter’s communications protocol. This open protocol
enables other systems to gain access to the 4300 power
meter.
2
Siemens Power Transmission & Distribution LLC
2 Installation
2 Installation
2.1 Location
Mount the 4300 power meter in a dry, dirt-free environment,
away from heat sources and high electrical fields. The temperature of the meter’s operating environment should not
exceed 50°C (122°F) or fall below 0°C (32°F). Refer to specifications in Appendix A.
2.4.1
Electrical Connections
Use 12 AWG to 14 AWG wire for all electrical connections.
Use ring or spade terminals to simplify connection. Phasing
and polarity of the AC current and voltage inputs, and their
relationship, are critical for proper operation of the meter.
Proper electrical wiring for the following configurations are
illustrated in section 2.7 to section 2.9:
•
Four-Wire Wye, Three-Element Direct Connection for
Systems of 120/208 VAC to 347/600 VAC (Figure 2.1)
•
Four-Wire Wye, Three-Element Connection Using Three
VTs (Figure 2.2)
The mounting enclosure should be positioned such that the
doors may be opened fully for easy access to the wiring to
the 4300 power meter display module, base module, and all
related components to allow for convenient troubleshooting.
When choosing the enclosure size, allow for extra space for
all wiring, intermediate terminal strips, shorting blocks, or any
other required components.
•
Four-Wire Wye, 2 1/2-Element Connection Using Two
VTs, for Balanced Systems Above 347/600 VAC
(Figure 2.3)
•
Three-Wire Wye, Three-Element Direct Connection for
Systems 120/208 VAC to 347/600 VAC (Figure 2.4)
•
Three-Wire Delta, 2 1/2-Element Connection Using Two
VTs and Three CTs (Figure 2.5)
2.2 Mounting
•
Three-Wire Delta, 2 1/2-Element Connection Using
2 VTs and Two CTs (Figure 2.6)
•
Three-Wire Single-Phase, Two-Element Direct Connection (Figure 2.7)
The enclosure that the 4300 power meter is mounted in (typically a switchgear cabinet), should protect the device from
atmospheric contaminants such as oil, moisture, dust, and
corrosive vapors, or other harmful airborne substances.
Mount the display module of the 4300 power meter in a
switchgear panel for easy access and viewing. As illustrated
in Figure B.1 (Appendix B), the display module requires
four holes and one cutout that allows you to connect the display cable. The mounting studs and display connector for
the display module fit existing ANSI C39.1 panel cutouts.
As illustrated in Figure B.2, mount the base module of the
meter flush against any flat surface, using the four slots on its
mounting flange. Normally, you mount the base module
inside a switchgear cabinet. The position of the labeling on
the base module lets you mount the module against a wall,
with the terminal strip aligned vertically, but you can mount
the module in the position you find most convenient.
The distance between the mounting locations of the display
and base modules can be up to 10 feet (3.03 meters). The
interconnecting display cable supplied with the power meter
is six feet. Display cables are available in lengths up to 10
feet. Contact your Siemens representative for ordering information.
Note: The display cable is not a standard RS-232
cable. Use only the cable supplied by Siemens with
the 4300 power meter. Using any other cable may
damage the meter.
2.3 Power Supply
The 4300 power meter is powered by a nominal 120 VAC (47
to 66 Hz) at 0.1 A. It can be powered from a dedicated fused
feed or from the voltage source it monitors, as long as that
source is a 120 VAC system. An optional 240 VAC (47 to
66 Hz) at 0.05 A power supply is available.
2.4 Wiring
Make electrical and communications connections for the
4300 power meter to the terminal strip located on the base
module. Figure B.2 illustrates the location of the terminal
strip on the base module.
Siemens Power Transmission & Distribution LLC
2.4.2
Communications Connection
Make RS-485 communications connections with a 22 AWG,
shielded, twisted-pair cable. Siemens recommends Alpha
Wire Corporation part numbers 5121C or 55121. Refer to
Chapter 6 for detailed information on communications wiring.
2.5 Voltage and Current Transformer
Selection
To properly monitor data with the 4300 power meter, you
must select the correct current transformers (CTs) and voltage transformers (VTs) if required. Metering accuracy
depends on the combined accuracies of the 4300 power
meter, the CTs, and the VTs (if used). The information you
need to properly select VTs and CTs, is discussed next.
2.5.1
VT Selection
Whether you need VTs to install the 4300 power meter in
your system depends on the voltage levels it monitors. You
can use the 4300 power meter for direct connection (without
VTs) in the following configurations:
•
four-wire wye, direct connection for 120/208 VAC to
347/600 VAC systems
•
three-wire wye, direct connection for 120/208 VAC to
347/600 VAC systems
•
three-wire single-phase (350 VAC or less)
You must use VTs in the following configurations:
•
four-wire wye systems over 347/600 VAC
•
three-wire delta
3
2 Installation
You can also use the meter’s inputs with VTs that have a
120 V secondary. If line-to-neutral (L-N) or line-to-line (L-L)
voltages exceed 347/600, you must use VTs. VTs scale
down the system L-N (wye) or L-L (delta) voltage to 120 V
full-scale. Select VTs as follows:
2.5.2
•
wye (star): VT primary rating is the system L-N voltage or
nearest higher standard size; VT secondary rating is
120 V.
•
delta: VT primary rating is the system L-L voltage; VT
secondary rating is 120 V.
The 4300 power meter’s current-input rating is 5 A. Normally
you select a CT primary rating that equals the current rating
of the power-feed protection device; however, if peak anticipated load is much less than the system’s rated capacity,
you can improve accuracy and resolution by selecting a
lower rated CT. In this case, CT size should equal the maximum expected peak current plus 25%, and rounded to the
nearest standard CT size.
VT quality directly affects system accuracy. The VTs you use
must provide good linearity and must maintain the proper
phase relationship between voltage and current in order for
voltage, kW, and PF readings to be valid. Use instrument
Accuracy Class 1 or better.
4
CT Selection
The 4300 power meter uses CTs to sense the current in each
phase of the power feed. CT selection also affects metering
accuracy.
Other factors can affect CT accuracy, too. For instance, long
cables can contribute to inaccuracy. To avoid this problem,
keep cables as short as possible, and make sure that the CT
burden rating exceeds the combined burden of the 4300
power meter (0.05 VA), plus cables, and other connected
devices. (Burden is the amount of load being fed by the CT,
measured in VA.)
Siemens Power Transmission & Distribution LLC
2 Installation
2.6 Connecting Ground Terminal
The G (ground) terminal of the 4300 power meter is both the
meter’s measurement reference point and the chassis
ground connection for the meter. This lead must be connected to earth ground. A good, low-impedance chassis
ground is essential for accurate measurement. Do not rely on
metal door hinges as a ground path.
A good, low impedance chassis ground connection is essential for accurate measurements and proper protection. It
should be made to the switchgear earth ground using a dedicated 14 AWG (2.7mm2) or larger wire to a point where there
will be no voltage error due to distribution voltage drops. Do
not rely on metal door hinges as a ground path. Ensure that
the screw has been tightened down securely onto the
ground wire.
2.7 Connecting Three-Phase Wye (Star)
Systems
In three-phase wye systems, the 4300 power meter senses
the line-to-earth ground voltage of each phase. If the power
system being monitored is a 120 VAC to 347 VAC system,
the meter’s inputs can be connected directly. Figure 2.1
illustrates a three-phase, four-wire wye, 120/208 VAC to
347/600 VAC system with a three-element direct connection.
Figure 2.2 illustrates a three-phase, four-wire wye, three-element connection using three VTs. Figure 2.3 illustrates a
three-phase, four-wire wye, 2 1/2-element connection using
two VTs. (Use this connection for balanced systems only.)
When using VTs, wire both the VT primary and secondary in
a wye (star) configuration, and protect voltage sensing leads
at their sources with breakers or fuses. If the power rating of
the VTs exceeds 25 W, fuse the secondaries. Wiring must be
exactly as shown for correct operation.
Figure 2.4 illustrates a three-phase, three-wire wye, 120/
208 VAC to 347/600 VAC system with a three-element direct
connection. When the star point of a three-wire wye system
is grounded, the 4300 power meter can be directly connected without VTs, provided that the voltages are within the
input range of the unit. For line-to-neutral (L-N) voltages over
347 VAC, use VTs.
Siemens Power Transmission & Distribution LLC
5
2 Installation
Line
RS-485
Current Inputs
Voltage Inputs
Power
4300
Power Meter
G
N
L
V1
V2
V3
I11
I12
I21
I22
I31
I32
+
A
B C N
Switchgear Ground Bus
Export
250 mA Slo Blo
N
120 VAC (240 VAC Optional)
L
Import
CT
Shorting Block
SEAbus
Switchgear
Ground Bus
2A Fuses
Load
Volts mode is 4-wire wye (V MODE = 4W WYE 2PT)
Figure 2.1 Four-Wire Wye, Three-Element Direct Connection for Systems of 120/208 VAC to 347/600 VAC
6
Siemens Power Transmission & Distribution LLC
2 Installation
Line
RS-485
Current Inputs
Voltage Inputs
Power
4300
Power Meter
G
N
L
V1
V2
V3
I11
I12
I21
I22
I31
I32
+
A
B C N
Switchgear Ground Bus
Export
250 mA Slo Blo
N
120 VAC (240 VAC Optional)
L
Import
CT
Shorting Block
Switchgear
Ground Bus
SEAbus
2A Fuses
VTs
Switchgear
Ground Bus
Fuses
Load
Volts mode is 4-wire wye (V MODE = 4 WIRE WYE)
Figure 2.2 Four-Wire Wye, Three-Element Connection Using Three VTs
Siemens Power Transmission & Distribution LLC
7
2 Installation
Line
RS-485
Current Inputs
Voltage Inputs
Power
4300
Power Meter
G
N
L
V1
V2
V3
I11
I12
I21
I22
I31
I32
+
A
B C N
Switchgear Ground Bus
Export
250 mA Slo Blo
N
120 VAC (240 VAC Optional)
L
Import
CT
Shorting Block
Switchgear
Ground Bus
SEAbus
2A Fuses
VTs
Fuses
Switchgear
Ground Bus
Load
Volts mode is 4-wire wye (V MODE = 4 WIRE WYE)
Figure 2.3 Four-Wire Wye, 2 1/2-Element Connection Using Two VTs, for Balanced Systems Above 347/600 VAC
8
Siemens Power Transmission & Distribution LLC
2 Installation
RS-485
Current Inputs
Voltage Inputs
Power
4300
Power Meter
G
N
L
V1
V2
V3
I11
I12
I21
I22
I31
I32
+
Line
Switchgear Ground Bus
Export
N
250 mA Slo Blo
N
A
120 VAC (240 VAC Optional)
B
C
L
Import
CT
Shorting Block
Switchgear
Ground Bus
SEAbus
2A Fuses
Load
Volts mode is 4-wire wye (V MODE = 4 WIRE WYE)
Figure 2.4 Three-Wire Wye, Three-Element Direct Connection for 120/208 VAC to 347/600 VAC Systems
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9
2 Installation
2.8 Connecting Three-Phase Delta Systems
When configured for ungrounded (floating) delta operation,
the 4300 power meter requires VTs and senses the line-toline voltages between each of the phases.
In these open configurations, connect the 4300 power meter
using VTs and either three or two CTs. Figure 2.5 and
Figure 2.6 illustrate delta connections using three and two
CTs respectively.
Line
RS-485
Current Inputs
Voltage Inputs
Power
4300
Power Meter
G
N
L
V1
V2
V3
I11
I12
I21
I22
I31
I32
+
A
B C
Switchgear Ground Bus
Export
250 mA Slo Blo
N
120 VAC (240 VAC Optional)
L
Import
CT
Shorting Block
Switchgear
Ground Bus
SEAbus
2A Fuses
VTs
Fuses
VAB
VCB
Switchgear
Ground Bus
Load
Volts mode is 3-wire delta (V MODE = 3 WIRE DELTA)
Figure 2.5 Three-Wire Delta, 2 1/2-Element Connection Using Two VTs and Three CTs
10
Siemens Power Transmission & Distribution LLC
2 Installation
Line
RS-485
Current Inputs
Voltage Inputs
Power
4300
Power Meter
G
N
L
V1
V2
V3
I11
I12
I21
I22
I31
I32
+
A
B C
Switchgear Ground Bus
Export
250 mA Slo Blo
N
120 VAC (240 VAC Optional)
L
Import
CT
Shorting Block
Switchgear
Ground Bus
SEAbus
2A Fuses
VTs
Fuses
VAB
VCB
Switchgear
Ground Bus
Load
Volts mode single-phase (V MODE = SINGLE PHASE)
Figure 2.6 Three-Wire Delta, 2 1/2-Element Connection Using 2 VTs and Two CTs
Siemens Power Transmission & Distribution LLC
11
2 Installation
2.9 Connecting Single-Phase, Three-Wire
Systems
When wiring for single-phase systems, you must connect the
system’s two voltage phases (each 180° with respect to
each other) to the V1 and V2 inputs of the 4300 power
meter.
You must also connect the wiring from the outputs of the two
CTs to the meter’s corresponding I11/I12 and I21/I22 input
pairs. This connection is illustrated in Figure 2.7.
Note: The V3 input and the I31/I32 input pair are
not used for this wiring system and should be
grounded.
Line
RS-485
Current Inputs
Voltage Inputs
Power
4300
Power Meter
G
N
L
V1
V2
V3
I11
I12
I21
I22
I31
I32
+
A
B N
Switchgear Ground Bus
Export
250 mA Slo Blo
N
120 VAC (240 VAC Optional)
L
Import
CT
Shorting Block
Switchgear
Ground Bus
2A Fuses
SEAbus
Switchgear Ground Bus
Load
Volts mode is single-phase (V MODE = SINGLE PHASE)
Figure 2.7 Three-Wire Single-Phase, Two-Element Direct Connection
12
Siemens Power Transmission & Distribution LLC
2 Installation
2.10 Communications Connections
Note: Wire the RS-485 port of every 4300 power
meter you install, and extend the wiring to a safely
accessible location. Field service of the meter,
including running diagnostics, testing, software
upgrades, and feature upgrades is performed via
the communications link.
The 4300 power meter communicates with supervisory
devices using the RS-485 communications standard.
RS-485 connections are made to the meter’s main terminal
strip, located on the base module. The wiring diagram for
RS-485 communications is illustrated in Figure 2.8.
RS-232 (50 ft. maximum)
RS-485 (4000 ft maximum)
PC
Isolated
Multi-Drop
Converter
4300
Power Meter
#1
+
-
• The Isolated Multi-Drop converter supports
four RS-485 busses.
4300
Power Meter
#2
• 4000 ft maximum cable length for per bus.
• Maximum 32 devices per bus; up to 128
devices.
• RS-485 Cable: 22 AWG shielded twisted-pair.
+
-
• Ground shield at one end only in each
segment of bus.
• Connect RS-485 + to +, and RS-485 - to -.
To Other Devices
Figure 2.8 RS-485 Communications Connection
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2 Installation
2.10.1 Test Block Termination
Extend RS-485 communications wiring to an easily and
safely accessible location, and terminate the communications wiring at a test block. Because it simplifies field-testing
and diagnostics, terminating communications wiring at a test
block is always recommended, regardless of whether a computer is used on the network.
2.10.2 Connecting to a Computer
To connect a computer to a network of 4300 power meters,
use a Siemens Isolated Multi-Drop converter. As illustrated in
Figure 2.8, the Isolated Multi-Drop converter (Siemens part
number 18-658-582-537) lets a computer’s RS-232 port
communicate with the 4300 power meter via the meter’s
RS-485 port.
To install the converter, connect one end of an RS-232 cable
to the computer’s RS-232 serial port and the other end to
the RS-232 port on the converter. Next, connect the converter to the meter, using 22 AWG, shielded, twisted-pair
wire. Use the same kind of wire to daisy-chain additional
4300 power meters or other RS-485 devices in a network.
As explained in section 2.10.1, terminating the RS-485
cable at an intermediate test block simplifies local testing.
14
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3 Operator Interface
3 Operator Interface
3.1.1
The 4300 power meter operates in two modes: Display
mode and Programming mode. Display mode allows the
viewing of metered data. Programming mode allows access
to the 4300 power meter set-up parameters for either display
or configuration. The front panel operator interface of the
4300 power meter display module provides access to both
modes and performs all required operating functions.
The Phase button selects the phase for which the voltage
and current values shall be displayed in the Volts, Phase, and
Amps fields of the LCD.
While in Display mode, press the Phase button repeatedly to
advance through the Phase button menu until you have
reached the desired parameter.
The front panel uses two labeled buttons and an LCD. The
buttons and the LCD serve separate functions in each of the
two operating modes. The buttons control the information
shown on the display. The label below each button indicates
the button’s alternate function.
3.1.2
•
line-to-neutral for each phase
Refer to Figure 3.1 for an illustration of the 4300 power
meter display module front panel operator interface in Display mode.
•
line-to-line for each phase
•
average for all phases
3.1 Display Mode
You can also display the readings for all three voltage phases
or all three current phases simultaneously.
In Display mode, the LCD uses four fields to display voltage,
phase, current, and power functions information.
Note: No more than five characters of the power
function value can appear simultaneously with voltage and current values; instead, the power function
field of the display appears blank. To display a
power function value of more than five characters,
press the Function button. Pressing the Function
button at this point displays the power function on
the entire display, replacing the voltage, phase, and
current display. To display voltage, phase, and current again, press the Phase button.
Phase Button
Phase Button Menu
The Phase button menu can display voltage and current
readings for
Refer to Table 3.1 for definitions of abbreviations used to
display these readings.
The number of different readings available depends on the
Volts mode setting (V MODE parameter).
The next three examples show you the menus when Volts
mode is set to 4-WIRE WYE or 4W WYE 2 PT, 3-WIRE
DELTA, or SINGLE PHASE.
4300
Volts RMS
Phase
Power Functions
Amps RMS
Phase
Function
Cursor
Increment
Figure 3.1 4300 Power Meter Display Module and Operating Buttons
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15
3 Operator Interface
Volts mode set to 4-WIRE WYE or 4W WYE 2 PT:
3.1.3
1.
While in Display mode, press the Phase button three
times. The meter displays each pair of line-to-neutral
volts and amps phase readings (A, B, C).
The Function button selects the power function to be displayed in the Power Functions field of the LCD next to the
Volts, Phase, and Amps fields.
2.
Press the Phase button once. The meter displays the
average for all line-to-neutral readings (L-N).
While in Display mode, press the Function button repeatedly
to advance through the Function button menu until you have
reached the desired parameter.
3.
Press the Phase button three times. The meter displays
each pair of line-to-line volts (ab, bc, ca) and amps
phase readings.
After the display advances through all the functions, it loops
back to the first function.
4.
Press the Phase button once. The meter displays the
average for all line-to-line volts and amps.
5.
Press the Phase button once. The meter simultaneously
displays the readings for all three-phase, line-to-neutral
volts (A, B, C). (Power function values do not appear
because the entire display is used to display data for all
three phases.)
6.
7.
3.1.4
Function Button
Function Button Menu
The Function Button Menu displays the following power
function:
•
KW
•
KW total
•
KVAR total
Press the Phase button once. The meter simultaneously
displays readings for all three-phase, line-to-line volts.
(ab, bc, ca). (Power function values do not appear
because the entire display is used to display data for all
three phases.)
•
KVA total
•
Power Factor
•
Frequency
•
KWH total
Press the Phase button once. The meter simultaneously
displays readings for all three amps phases (A, B, C).
(Power function values do not appear because the
entire display displays all three phases of data.)
•
KW Demand
•
KW Demand Max.
Volts mode set to 3-WIRE DELTA:
Power function abbreviations and definitions are provided in
Table 3.1. The definitions also show which functions provide
individual phase readings, average-of-all-phases readings,
and totaled values for all phases. Functions that provide individual phase readings and average-of-all-phases readings
indicate which reading is displayed by embedding the name
in the function label as follows:
1.
While in Display mode, press the Phase button three
times. The meter displays each pair of line-to-line volts
(ab, bc, ca) and amps phase readings.
2.
Press the Phase button once. The meter displays the
average for all line-to-line volts and amps.
•
phase name (a, b, c, ab, bc, ca), for example, Vab
3.
Press the Phase button once. The meter simultaneously
displays readings for all three-phase, line-to-line volts.
(ab, bc, ca). (Power function values do not appear
because the entire display is used to display data for all
three phases.)
•
average (av, LNav, LLav), for example, V(LN)
Some readings given in K units automatically change to M
units when values exceed 9999 K.
4.
Press the Phase button once. The meter simultaneously
displays readings for all three amps phases (A, B, C).
(Power function values do not appear because the
entire display displays all three phases of data.)
Volts mode set to SINGLE PHASE:
1.
From Display mode, press the Phase button twice. The
meter displays each phase of line-to-neutral voltage and
current phase readings (A, B).
2.
Press the Phase button once. The meter displays the
average for both line-to-neutral readings (L-N).
16
Under certain conditions, the meter cannot display power
function values simultaneously with the voltage, phase, and
current values. The power meter does not display power
functions in the following cases:
•
when viewing values for all three-phase voltages
(line-to-line or line-to-neutral)
•
when viewing values for all three-phase currents
•
when viewing a power function value that consists of
more than five characters
Use the Phase and Function buttons to re-display the Volts,
Amps, and Power Functions fields.
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3 Operator Interface
Table 3.1 Abbreviations used by the 4300 Power Meter in Display Mode
Abbreviations Used in Display for Phase Readings
**
Individual (line-to-neutral for volts), total = total of all phases.
+
Average of all phases (line-to-neutral for volts).
CD*DE*EC
Individual (line-to-line for volts).
+
Average of all phases (line-to-line for volts)* (asterisk) = sliding window demand (that is, not thermal).
Abbreviations Used in Display for Power Functions
Total instantaneous real-power flow for all phases. A positive number (no sign) indicates real power in the forward direction (imported). A negative number (negative signed) indicates real power in the reverse direction (exported).
Total reactive power.
Total apparent power.
-
Total accumulated real energy (total KW Hours) for all phases. This accumulated value increases when real power is
being imported, and decreases when real power is exported. Therefore, this value can be signed either positively (net
import) or negatively (net export). Note also that its value rolls over to (zero) at 1,999,999,999 KWH.
Total instantaneous real-power demand of all phases.
Maximum instantaneous real-power demand of all phases since the last reset.
Frequency, all phases, in Hertz.
Power factor total of all phases. A leading PF (current leads voltage) indicated by the designation PF LEAD. A lagging
PF (current lags voltage) is indicated by the designation PF LAG.
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3 Operator Interface
3.2 Polarity of Power Readings
V3
I11
I12
I21
I22
I31
I32
RS-485
Current Inputs
V1
V2
-
+
G
N
L
Figure 3.2 illustrates how the 4300 power meter interprets
and displays signed (positive or negative) values for power
imported or exported and for leading or lagging indicators of
power factor.
θ
Voltage Inputs Power
θ
θ
θ
θ
Figure 3.2 Polarity Indications Determining Power Factor
18
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3 Operator Interface
3.3 Programming Mode
After installing the 4300 power meter, you must program it
specifically for your system. You use the power meter’s Programming mode to gain access to its set-up parameters. In
Programming mode, the LCD displays all setup parameter
information.
Enter Programming mode by pressing and holding down the
Phase and Function buttons simultaneously for two to three
seconds until the LCD displays PROGRAMMING MODE.
Return to Display mode by pressing the Phase and Function
buttons again.
In Programming mode, the front panel buttons assume new
programming functions. The label below each button indicates its alternate function. For example, the Function button
used in Display mode changes to the Increment button in
Programming mode.
3.3.1
Cursor and Increment Buttons
The Cursor and Increment buttons change the value of the
displayed parameter.
Press the Increment button to increase the value of the digit
where the cursor resides. For parameters that have YES or
NO values, pressing the Increment button toggles a value to
either YES or NO.
Other parameters, such as BAUD RATE, have several values
available. Press the Increment or Decrement button to scroll
through the values.
Note: To scroll through each setup parameter,
press the Cursor and Increment buttons simultaneously, then release them quickly. If you hold down
the buttons for longer than two seconds, the meter
switches to Display mode. Refer to Figure 3.3.
If you pass a parameter by mistake, continue to
press and then quickly release both the Cursor and
Increment buttons at the same time until the
desired parameter appears again. Refer to
Figure 3.3.
Local programming and all programmable operating parameters are described in the next chapter.
Press the Cursor button to move the cursor left one digit
(cursor wraps around if necessary).
4300
Volts RMS
Phase
•
To enter or leave
Programming mode,
press both buttons > 2 sec.
•
To scroll through parameters,
press both quickly.
Power Functions
Amps RMS
Phase
Function
Cursor
Increment
Figure 3.3 Entering Programming Mode
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3 Operator Interface
20
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4 Local Programming
4 Local Programming
The process of supplying necessary information to the 4300
power meter from the front panel is known as local programming. This chapter covers programming the power meter
locally.
4.1 Start Up
After you have installed the 4300 power meter and checked
the wiring, start up the unit by connecting its power wires to
the L and N leads on the 120 VAC control power source and
the G lead to the equipment ground bus. Connect the
240 VAC version to a 240 VAC control power source only.
The 240 VAC version does not function if connected to a
120 VAC source.
4.2.1
Entering the Password
In Programming mode, press and release the Cursor and
Increment buttons simultaneously until the PASSWORD
parameter appears. It is the first parameter in Programming
mode. Enter the password using the Increment button to
increase by one the digit or character over the cursor. Use
the Cursor button to move the cursor to the left by one
place.
4.2.2
Changing the Password
In Programming mode, press and release the Cursor and
Increment buttons simultaneously until the PASSWORD
parameter appears. Enter the old password using the Cursor
and Increment buttons as described in the previous paragraph.
To change the password, again press and release the Cursor and Increment buttons simultaneously until the PASSWORD parameter appears. Now enter the new password
using the Increment button to increase by one the digit or
character over the cursor. Use the Cursor button to move the
cursor to the left by one place (four-digits maximum). Return
to Display mode to complete the process.
If you lose or forget your password, contact Siemens customer service.
4.3 CT Primary Rating
Set the CT PRIMARY parameter to the primary rating of the
CTs being used only if the CTs are rated for a 5 A, full-scale
output. If the CTs are not rated for these output levels, contact a Siemens factory representative for assistance.
4.4 Voltage Inputs
You can connect the 4300 power meter’s voltage inputs
either directly to the phase A, B, and C power lines or to voltage transformers (VTs).
You can connect the meter directly to four-wire wye systems
up to 347 VAC. Above this voltage level, you must use VTs.
4.4.1
Direct Connection
If you connect the 4300 power meter directly to the power
lines, set the USING PT’S? parameter to NO. This setting
allows you to connect the meter directly to line-to-neutral
(wye) or line-to-line (delta), 120 to 347 VAC systems. The
meter automatically selects the appropriate scale.
On startup, the 4300 power meter enters Display mode
showing values in the Volts, Phase, Amps, and Power Functions fields of the front panel LCD (refer to Chapter 3,
Figure 3.1). The values that initially appear on the LCD are
usually incorrect because the power meter has not yet been
programmed for a live system.
4.2 Password Protection
A password should be used to prevent any accidental or
unauthorized parameter changes. While power meter information can be accessed for display without a password,
changes to parameter settings require a user password. At
shipping, the 4300 power meter password is set to 0 (zero).
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4.4.2
VT Connection
If you use VTs to connect to line-to-neutral (wye) or line-toline (delta) voltages higher than 347 VAC, set USING PT’S?
to YES. The meter then displays the PT PRIMARY and PT
SECONDARY parameters, which give the meter the VT voltage ratings and allow it to set its internal, full-scale input references.
Set PT PRIMARY to the primary rating of the VTs you are
using. This setting should be equivalent to the line-to-neutral
or line-to-line voltages being measured by the meter.
Set PT SECONDARY to the secondary rating of the VTs you
are using. The maximum secondary voltage you can use is
347 VAC.
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4 Local Programming
4.5 Volts Mode
4.8 Demand Periods
Options for setting Volts mode comprise three-wire wye,
four-wire wye, three-wire delta, and single-phase systems.
Set Volts mode to match your system according to the following guidelines:
The DEMAND PERIOD parameter sets the length of demand
subperiods to be used in calculating optional demand values. You can set the number of demand subperiods with the
# OF DMD PERIODS parameter. Refer to Chapter 5 for
more details and demand measurements.
•
If your system is balanced four-wire wye using only two
VTs, set Volts mode to 4W WYE 2PT.
•
If your system is four-wire wye and is either direct connect or using three VTs, set Volts mode to 4 WIRE WYE.
•
If your system is three-wire wye, set Volts mode to
4 WIRE WYE.
•
If your system is three-wire delta, set Volts mode to 3
WIRE DELTA.
•
If your system is three-wire single-phase, set Volts mode
to SINGLE PHASE.
4.10 Diagnostic Mode
Note: If you set Volts mode to 4W WYE 2PT, the
meter will measure power accurately only if the voltages are balanced.
•
check the present software version when planning to
upgrade the power meter
•
when equipment failure is suspected
The 4300 power meter also offers a demo mode (VMODE =
DEMO) parameter that you can use to demonstrate the
meter’s ability to display and communicate data, without
connecting to a real power system. Specifically, you can display and communicate voltage, current, and power function
values based on the input scales you have programmed
through the display module or communications port.
4.6 Communications
The UNIT ID and BAUD RATE parameters are communications parameters. Each 4300 power meter on an RS-485
communications network must have a unique Unit ID in the
range 1 to 254. If you use a remotely located communications device to communicate with a meter, set the baud rate
of the meter to match the baud rate of its supervisory device
and all other devices on the network.
4.7 Clear and Reset
The RESET MIN/MAX function clears and resets the KWH
DMD* MAX value to zero. Choose either YES or NO using
the Increment button while in Programming mode. The
CLEAR ALL HOURS? function resets the KW HOURS readings to 0 (zero). Choose either YES or NO using the Increment button while in Programming mode.
4.9 Display Contrast
The CONTRAST/ANGLE function allows you to adjust the
contrast of the display module’s LCD for optimum readability
at any vertical viewing angle. To adjust the LCD, press the
Increment button to change the contrast level of the display
in preset steps, and adjust the level until you achieve the best
readability for a given installation.
Diagnostic mode is a special mode that is only used to
Diagnostic mode is only displayed if the DIAGNOSTIC
MODE? parameter is set to YES. Pressing the Cursor and
Increment buttons simultaneously advances through the
parameters.
4.10.1 Version Check
The 4300 power meter has been designed to easily upgrade
meters already in service. New features can be added to the
meter using a simple software upgrade that loads a new
operating program into the power meter.
The SOFTWARE VER and REV DATE parameters indicate
which version of software is currently installed.
4.10.2 System Status
The CHECKSUM parameter provides a pass or fail value.
The STATUS FLAGS parameters indicate the status of the
internal system and reset the status flag.
If you encounter a problem with the meter and suspect the
problem is due to a device failure, contact Siemens immediately. A Siemens representative may ask you to check the
values of the diagnostic parameters to help determine the
source of the problem.
A summary of all programmable operating parameters and
the special diagnostic parameters are provided on the next
page in Table 4.1 and Table 4.2.
22
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4 Local Programming
Table 4.1 Programmable Operating Parameters
Parameter
Description
Range
Must be entered correctly to allow you to change the value of any setup param- Up to four-digit number
eter(s) or to allow you to clear/reset any function.
a
%
Selecting NO indicates that meter voltage inputs are being connected directly to
the power lines, without PTs. Selecting YES indicates PTs are being used.
NO (direct connection)
YES (input from PTs)
a9
Set to PT primary voltage rating. This parameter only appears when USING
PT’S? parameter has been set to YES.
0 to 999,999 V
9
Set to PT secondary voltage rating. This parameter only appears when USING
PT’S? parameter has been set to YES.
0 to 347 V
a
Sets full scale AC input current for A, B, C phases (CT primary current rating).
0 to 32,000 A
9
Sets Volts mode for correct power system programming. Demo mode provides
preset values for all measurements based on input scales—use for demonstration purposes only.
4-WIRE WYE, 4W WYE 2 PT,
3-WIRE DELTA, SINGLE
PHASE, DEMO
aa9
Sets communications SEAbus address for each 4300 power meter.
1 to 254
9
Baud rate at which the power meter transmits and receives information via
communications.
300, 1200, 2400, 4800,
9600, 19200
;
Selecting YES sets the KW HOURS (import and export) readings to 0 (zero).
NO, YES
a-;
Selecting YES resets KW DMD MAX.
NO, YES
a9
Sets length of the demand subperiod to be used in calculating optional demand
values. See Chapter 5, Demand Measurements.
1 to 99 (minutes)
!a
Sets the number of demand subperiods to be averaged in calculating the sliding
window demand values. See Chapter 5, Demand Measurements.
1 to 15 (periods)
-
Press increment to adjust contrast of the LCD display.
(Contrast changes)
a
a;
Setting the parameter to YES allows access to the DIAGNOSTIC MODE param- NO (bypass diagnostic)
eter.
YES (gain access)
Table 4.2 Diagnostic Parameters (displayed only if set to DIAGNOSTIC MODE? YES)
Parameter
Description
Range
a6
Allows you to view the 4300 power meter’s factory-set serial number.
five-digit number
a
This parameter indicates the present version of firmware operating in the meter.
four-digit number
Revision date of the operating software in the 4300 power meter.
day/mo/yr format
Checksum value in program memory. Indicates PASS or FAIL.
six-character hexadecimal
number
6
Indicates status of various internal systems. Normally reads 0 (zero). If other
than zero, contact your Siemens representative.
six character hexadecimal
number
;
Clears STATUS FLAGS: field to zero.
YES or NO
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4 Local Programming
4.11 Programming Example
•
enter your password
The programming example in Figure 4.1 is a step-by-step
guide to programming the meter from the display module.
The example shows you how to
•
set the VT PRIMARY parameter to 480 V
•
continue through the parameters
•
return to Display mode.
Display reads:
Press these buttons:
1
Phase
Function
Cursor
Increment
Press and hold down both buttons to enter programming mode.
2
Phase
Function
Cursor
Increment
Press and quickly release both buttons.
3
Phase
Function
Cursor
Increment
Press the Increment button once to display 0 (zero), the default password..
4
Phase
Function
Cursor
Increment
Press and quickly release both buttons to advance to the next menu.
5
Phase
Function
Cursor
Increment
Press the Increment button once to toggle to Yes..
Figure 4.1 Programming Example
24
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4 Local Programming
Display reads:
Press these buttons:
6
Phase
Function
Cursor
Increment
Press and quickly release both buttons to advance to the next menu.
7
Phase
Function
Cursor
Increment
Press the increment button nine times to set the rightmost digit to 0 (zero).
8
Phase
Function
Cursor
Increment
Press Cursor to move to the next digit.
9
Phase
Function
Cursor
Increment
Press the increment button eight times to set the second digit to 8.
10
Phase
Function
Cursor
Increment
Press Cursor to move to the next digit.
11
Phase
Function
Cursor
Increment
Press the increment button four times to set the leftmost digit to 4.
12
13
Continue to enter the other parameter in the same manner. Press both
buttons to advance to the next parameter. Press Increment to increment
a particular digit or selection. Press Cursor to move the cursor to the left.
Phase
Function
Cursor
Increment
Press and hold down both buttons to return to display mode.
Figure 4.1 (continued) Programming Example
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4 Local Programming
26
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5 Demand Measurements
5 Demand Measurements
Power utilities generally bill commercial customers based on
their energy consumption (in KWH) and on their peak-usage
levels, called peak demand in KW. Demand is a measure of
average power consumption over a fixed time period, typically 30 minutes. Peak demand is the highest demand level
recorded during the billing period.
Methods and intervals for measuring demand vary among
power utilities. Some common methods include thermalaveraging, sliding-window, and fixed-interval techniques. The
4300 power meter performs sliding-window demand calculations.
5.1 Sliding-Window Demand
The sliding-window (or rolling-interval) method divides the
demand interval into subperiods, and measures it electronically based on the average load level over the most recent
set of subperiods. Compared to the fixed-interval method,
this method has a faster response time.
The 4300 power meter has a DEMAND PERIOD parameter
(one to 99 minutes) and a # OF DMD PERIODS parameter
(one to 15), both of which you can program from the display
module. The DEMAND PERIOD parameter represents the
length of the utility’s demand subperiod; the # OF DMD
PERIODS parameter represents the number of subperiods
that make up the total demand interval. For example, with a
6x5 minute (30 minutes total) sliding-window method,
demand equals the average power consumption over the
last six five-minute periods.
Siemens Power Transmission & Distribution LLC
The sliding-window method used by the 4300 power meter
allows you to match virtually any type of sliding-window measurement method used by your utility (for example, 15x2,
6x5, 1x30). Using this method ensures that the meter’s readings are always as high or slightly higher than those of the
utility.
5.2 Synchronizing Sliding-Window Demand
You can synchronize the internally timed Demand Period of
the meter to the utility’s timing by performing a manual procedure at the display module.
To synchronize the DEMAND PERIOD parameter, first reset
either the DEMAND PERIOD parameter or the # OF DMD
PERIODS parameter to its present value. (Do not actually
modify it; just reset the parameter to its present value, for
instance from 5 back to 5). At the start of the utility’s Demand
Period, press both Cursor and Increment buttons simultaneously to advance to the next parameter. This procedure
resets the meter’s Demand Period clearing all sliding-window
demand measurements and synchronizes the meter to the
power utility’s timing.
5.3 Resetting the Real-Time Demand
Parameters
To reset the KW DEMAND MAX value, enter the Programming mode and step through each parameter until RESET
MIN/MAX appears. Using the Increment key, choose Yes to
reset this value to 0 (zero). This action clears both the maximum kW demand and the real-time accumulated demand.
27
5 Demand Measurements
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6 Communications
6 Communications
The 4300 power meter is equipped with an RS-485 communications port, which enables it to exchange data over long
distances with a supervisory display/control station running
compatible software. This feature allows you to monitor or
control (or both depending on your software) a single meter
or a number of meters connected on a common network.
You can use the RS-485 communications port to program
your device remotely (local programming is covered in
Chapter 4) and update the meter’s software, as described in
section 6.3.
Before connecting a meter to a supervisory device, set the
meter’s baud rate to that of the supervisory device. In addition, set the Unit ID for each meter to a unique value.
6.1
Connecting to an RS-485 Network
Provided that each meter has a unique Unit ID, you can use
RS-485 communication to connect many remote meters to a
device running supervisory software. This software displays
all data normally displayed on the display module of each
meter.
Using RS-485 communications allows you to monitor all
meters from a single supervisory device. The distance for
RS-485 communications is limited to 4000 feet, using
22 AWG, twisted-pair, shielded cable.
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Chapter 2, Figure 2.8 illustrates how to connect the 4300
power meter within the RS-485 network. For more information regarding the ACCESS RS-485 network refer to the
ACCESS Systems Installation Guide (Manual No.
SG6028-01).
6.2
Using Other Systems
The 4300 power meter’s communications protocol is
described in detail in the 4300 Power Meter SEAbus Protocol Reference Manual (Manual No. SG6353-00). This open
protocol allows other systems to communicate with the 4300
power meter via the meter’s RS-485 port. To obtain this
manual, contact Siemens customer service.
6.3
Updating Software
As Siemens releases new versions of 4300 power meter
software, you will be able to update your software via the
meter’s RS-485 port. You can update the software from a
directly connected monitoring and supervisory device. Refer
to your device’s operator manual for instructions on downloading device software.
Note: To update the meter’s on-board software
remotely, Siemens recommends that you connect
the meter to a communications bus during installation, even if you do not require remote communications initially.
29
6 Communications
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7 Validation
7 Validation
7.1 Maintenance
The 4300 power meter has a battery-backed, nonvolatile
memory. Other than battery replacement, the meter needs
no regular maintenance. The life expectancy of the battery is
seventy years at 50°C, 28 years at 60°C, and 11 years at
70°C.
If the meter operates at less than 50°C for 60% of the time,
less than 60°C for 90% of the time, and less than 70°C for
100% of the time, the life expectancy of the battery is 35
years. If the meter operates in an environment where temperatures regularly exceed 60°C, replace the battery every ten
years.
7.2 Calibration
Siemens calibrates all 4300 power meters at the factory.
Because it contains no mechanical parts, the 4300 power
meter should not need calibrating while operating in the field.
If your 4300 power meter needs recalibration, contact
Siemens customer service.
7.3 Field Service
The 4300 power meter is not designed for servicing in the
field. If a meter fails, replace it with a new one. To remove the
meter, use a CT shorting block to disconnect the meter’s
current inputs, without open-circuiting the CTs. Wire the
shorting block so that protective relaying is not affected.
For a replacement battery, contact Siemens customer service.
Siemens Power Transmission & Distribution LLC
31
7 Validation
32
Siemens Power Transmission & Distribution LLC
8 Troubleshooting
8 Troubleshooting
If you encounter problems during normal operation of the
4300 power meter, check the following list for symptoms and
explanations on how to correct this particular problem.
If the display does not operate:
3.
Check that the correct voltage is available to the power
supply (L and N connections on the terminal strip). The
required voltage depends on the meter’s power supply
option (120 VAC for the standard unit or 240 VAC for the
optional unit).
4.
Check that the G terminal is properly grounded.
5.
Check the cable connection between the display module and the base module.
6.
Turn the power off for 10 seconds, and turn it back on.
7.
Check that the cable is the same one supplied with the
power meter. A standard RS-232 cable may cause
equipment damage.
If the voltage or current readings are incorrect:
1.
Check that the voltage mode is properly set for the
given wiring.
2.
Check that the voltage and current scales are properly
set.
3.
Make sure the G terminal is properly grounded.
4.
Check the quality of the CTs and VTs being used.
5.
Make the following voltage tests:
a. V1, V2, V3 to G should be reasonably balanced, and
no greater than 347 VAC.
b. The G-to-switchgear earth ground should be 0 V.
6.
Measure the current flowing into I11, I21, and I31. These
measurements should be proportional to the amps
readings on phases A, B, and C, where CT Primary, CT
Secondary x I11 = amps. Secondary phase A (similar for
phases B and C) currents should be no greater than 5 A
AC.
Siemens Power Transmission & Distribution LLC
If the KW or power factor readings are incorrect, but voltage
and current readings are correct:
Make sure that the phase relationship between the voltage and current inputs is correct by comparing the wiring with the appropriate wiring diagram.
If the RS-485 communication does not work:
1.
Check that the baud rate of the supervisory device is the
same as that of the 4300 power meter.
2.
Power down the 4300 power meter and the supervisory
device. Then power them up and try to establish communication.
3.
Check that the Unit ID (address) of the 4300 power
meter is the same as the address assigned to it in the
supervisory device.
33
8 Troubleshooting
34
Siemens Power Transmission & Distribution LLC
Appendix A: Technical Specifications
A Technical Specifications
The following tables contain technical specifications and
input ratings of the 4300 power meter.
Table A.1 Technical Specifications
Parameter
Accuracy
Resolution
Range
Volts
0.5%
0.1%
0 to 999,999 1
Amps
0.5%
0.1%
0 to 9999
KVA and KVAR
1.0%
0.1%
0 to 999,999 2
KW and KW Demand
1.0%
0.1%
0 to 999,999 2
Power Factor
2.0%
1.0%
0.6 to 1.0 lead or lag
1
Reads in K (that is, x 1,000) for readings over 9,999
2
Reads in M (that is, x 1,000,000) for readings over 9,999
Table A.2 Input Ratings
Voltage Inputs
Current Inputs
Power Supply
Operating Temperature
Standard:
120 to 347 VAC nominal full-scale inut (programmable)
Overload withstand:
600 VAC continuous, 1500 VAC for 1 s
Input impedance
1 MW
Standard:
5.000 A AC nominal full-scale input
Overload withstand:
15 A continuous, 300 A for 1 s
Input impedance:
0.002 W
Burden:
0.05 VA
Standard:
95 to 145 VAC/0.1 A/47 to 66 Hz
Optional
190 to 290 VAC/0.05 A/47 to 66 Hz
Standard:
0°C to 50°C (32°F to +122°F) ambient air
Storage Temperature
-30°C to +70°C (-22°F to +158°F)
Humidity
5 to 95%, non-condensing
Siemens Power Transmission & Distribution LLC
35
Appendix B: Mounting Dimensions
B Mounting Dimensions
Figure B.1 and Figure B.2 illustrate the mounting and
mechanical dimensions for the 4300 power meter’s
display and base modules.
4300
Volts RMS
Power Functions
Amps RMS
Phase
Phase
Function
Cursor
Increment
Front View
Rear View
Figure B.1 4300 Display Module Dimensions
36
Siemens Power Transmission & Distribution LLC
Appendix B: Mounting Dimensions
Overall Mounting Width
(Including Cable Clearance)
8.70"
(221.0 mm)
Minimum Clearance
for Display Cable
3.00"
(76 mm)
Overall Chassis Width
5.70"
(144.8 mm)
Mounting Slots
Center-to-Center
5.00"
(127.0 mm)
Serial Number:
Power Supply: 95-145VAC/0.1 Amp./47-66Hz
Option*:
190-290VAC/0.05Amp./47-66Hz
Voltage Inputs: 120/277/347 VAC Nominal
Current Inputs: 5Amp. AC, 30V Maximum
*Option-Refer to Model # Listed above
Max Dielectric Test 1000 V- 1 Min 1500 V- 1 Sec
Power
Model:
N
Voltage Inputs
G
V1
Can cause severe injury or
death.
More than one live circuit.
Disconnect all live circuits
before servicing.
I12
Current Inputs
This equipment complies with
the requirements in part 15 of
FCC rules for a class A
computing device. Operation
of this equipment in a
residential area may cause
unacceptable interference to
radio and TV reception
requiring the operator to take
whatever steps are necessary
to correct the interference.
E95810
LR 57329
Mounting Slots
Center-to-Center
7.67"
(194.8 mm)
Overall Height
8.12"
(206.3 mm)
I21
I22
I31
I32
Siemens Energy & Automation, Inc
Switchgear & Motor Control Division
Raleigh, NC USA
Made in Canada
RL
V3
0.44"
(11.1 mm) 13x
RS-485
Hazardous Voltage.
V2
I11
Display Cable
WARNING
L
1.25"
(31.8 mm)
0.73" (42.9 mm)
2.63"
(68.8 mm)
1.69"
(42.9 mm)
Figure B.2 4300 Base Module Dimensions
Siemens Power Transmission & Distribution LLC
37
Appendix C: Ordering Information
C Ordering Information
The following table contains ordering information for the
4300 power meter. A product name and catalog number is
provided for ordering convenience.
Table C.1 Ordering Information
Product Name
Catalog Number
4300 power meter 120 VAC
4300DC-120VAC
4300 power meter 240 VAC
4300DC-240VAC
The 4300 power meter comes with a 6-foot display cable.
Cables measuring up to 10 feet can be special ordered by
contacting you Siemens representative.
38
Siemens Power Transmission & Distribution LLC
Siemens Power Transmission &
Distribution LLC
Customer Service
P.O. Box 29503
Raleigh, NC 27626
ACCESS Systems Service Request Form
To report problems with Siemens ACCESS systems and devices, make a copy of this form,
complete it with as much information as you can, and contact your Siemens representative.
You can also fax this form to Siemens Customer Service at 919-365-2830.
For emergency service call 1-800-347-6659.
Customer Information
Job site location and contact: ___________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
Phone and fax number: ________________________________________________________________
Siemens sales order number: ___________________________________________________________
Siemens manufacturing order number (from drawing): ______________________________________
System Information
Describe the number and type of devices on your ACCESS system.
Field Devices
Quantity
Device Type
Quantity
4300 power meter
4700 power meter
4720 power meter
Static Trip IIIC trip unit
Static Trip IIICP trip unit
Sensitrip III trip unit
SB breaker trip unit
SAMMS-LV device
SAMMS-MV device
Device Type
SCOR relay
ISGS relay
7SA, 7SJ, or 7UT relay
Multiplexer Translator
Isolated Multi-Drop converter
S7-I/O device
Pulse reading meter
Other:
Other:
Supervisory Devices and Software
Quantity
Product
WinPM software
Host PC software
Power Monitor PC software
SIEServe software
Other software:
Form: SG6004-02
0997
Quantity
Product
Power Monitor Panel (PMP)
PC32F power monitor
Siemens PLC
Other hardware:
Other hardware:
Siemens Power Transmission & Distribution LLC
Problem Description
Provide the following information on the affected device(s):
Device type: __________________________________________________________________________
Model or catalog number: ______________________________________________________________
Part number: ___________________________ Serial number: _________________________________
Hardware version: _______________________ Software version:_______________________________
Installed options: ______________________________________________________________________
Configuration information, including operational settings, parameters, wiring, type of system:
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
On what type of electrical equipment are the devices installed? (switchgear, motor control center,
switchboard, and so on): _______________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
Provide a brief description of the problem: ________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
Indicate what error messages, if any, are generated by the device or supervisory software. Include
messages listed in the event log: ________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
To be completed by Siemens
Received by: _________________________________ Date received:___________________________
Reviewed by: _________________________________ Date reviewed: __________________________
Sales engineer: _______________________________
Problem report tracking number: ________________________________________________________
Problem classification code: ____________________________________________________________
Corrective action: _____________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
Siemens Power Transmission & Distribution LLC
Form SG6004-02 0997
Warranty
Company warrants that on the date of shipment to Purchaser the goods will be of the kind and quality
described herein, merchantable, and free of defects in workmanship and material.
If within one year from date of initial operation, but not more than eighteen months from date of shipment by
Company, of any item of the goods, Purchaser discovers that such item was not as warranted above and
promptly notifies Company in writing thereof, Company shall remedy such defect by, at Company's option,
adjustment, repair or replacement of the item and any affected part of the goods. Purchaser shall assume all
responsibility and expense for removal, reinstallation and freight in connection with the foregoing remedy. The
same obligations and conditions shall extend to replacement items furnished by Company hereunder. Company shall have the right of disposal of items replaced by it. Purchaser shall grant Company access to the
goods at all reasonable times in order for Company to determine any defect in the goods. In the event that
adjustment, repair or replacement does not remedy the defect, the Company and Purchaser shall negotiate in
good faith an equitable adjustment in the contract price.
The Company's responsibility does not extend to any item of the goods which has not been manufactured
and sold by Company. Such item shall be covered only by the express warranty, if any, of the manufacturer
thereof. The Company and its suppliers shall also have no responsibility if the goods have been improperly
stored, handled, or installed; if the goods have not been operated or maintained according to their ratings or
according to instructions in Company or supplier furnished manuals; or if unauthorized repairs or modifications have been made to the goods.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES (EXCEPT TITLE). INCLUDING BUT
NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND CONSTITUTES THE
ONLY WARRANTY OF COMPANY WITH RESPECT TO THE GOODS.
The foregoing states Purchaser's exclusive remedy against Company and its suppliers for any defect in the
goods or for failure of the goods to be as warranted, whether Purchaser's remedy is based on contract, warranty, failure of such remedy to achieve its essential purpose, tort (including negligence), strict liability, indemnity, or any other legal theory, and whether arising out of warranties, representations, instructions, installation
or defects from any cause.
Form: SG6024-01
0797
Siemens Power Transmission & Distribution LLC
Index
abbreviations
display mode 17
phase readings 17
power functions 17
contrast 22
CONTRAST/ANGLE 22, 23
CT PRIMARY 21, 23
current transformer
primary rating 21
selection 4
current transformer selection 4
Cursor button 19
B
D
base module
dimensions 37
mounting 3
rear view 1
BAUD RATE 22, 23
buttons
Cursor 19
Function 16
Increment 19
Phase 15
demand
measurements 27
resetting real-time demand 27
sliding window demand 27
synchronizing sliding window demand 27
DEMAND PERIOD 22, 23
demand periods 22
diagnostic mode 22
DIAGNOSTIC MODE? 22, 23
diagnostic parameters 23
direct connection 21
display
contrast 22
liquid crystal 2
troubleshooting 33
Display mode 15
abbreviations 17
display module
front view 1
# OF DMD PERIODS 22, 23
A
C
cable 3
calibration 31
changing password 21
CHECKSUM 22, 23
CLEAR ALL HOURS? 22, 23
clear function 22
CLEAR STATUS? 23
communications 22, 29
compatibility 2
connections 13
RS-485 13, 29
troubleshooting 33
updating software 29
with other systems 29
computer connection 14
configuration
example 24
connection
communications 3, 13
computer 14
direct 21
electrical 3
four-wire wye, 2 1/2-elements with two VTs 8
four-wire wye, three element direct 6
ground terminal 5
single phase, three wire 12
three-phase delta 10
three-phase wye (star) 5
three-wire delta, 2 1/2 elements with two VTs
and two CTs 11
three-wire delta, 2 1/2-element with two VTs
and three CTs 10
three-wire single phase, two elements direct 12
three-wire wye, three elements direct 9
VT 21
Siemens Power Transmission & Distribution LLC
E
electrical connections 3
enclosure 3
entering password 21
F
features
upgrading 2
field service 31
FIRMWARE SMN 23
four-wire wye, three element direct connection 6
four-wire wye, three element, three VTs connection 7
Function button 16
functions
clear 22
measurement 2
reset 22
G-H
ground terminal connection 5
I-i
Index
I-J
Increment button 19
input ratings 35
installation 3
cable 3
calibration 31
location 3
maintenance 31
mounting 3
overview 1
power supply 3
test block termination 14
wiring 3
K
KW HOURS 22
KWH DMD* MAX 22
L
local programming 2, 21
location
enclosure 3
installation 3
mounting 3
M-N
maintenance 31
measurement functions 2
mode
Display 15
Programming 19
mounting 3
mounting dimensions 36
O
operating parameters 23
operator interface 15
ordering information 38
P-Q
parameters
# OF DMD PERIODS 22, 23
BAUD RATE 22, 23
CHECKSUM 22, 23
CLEAR ALL HOURS? 22, 23
CLEAR STATUS? 23
CONTRAST/ANGLE 22, 23
CT PRIMARY 21, 23
DEMAND PERIOD 22, 23
diagnostic 23
DIAGNOSTIC MODE? 22, 23
FIRMWARE SMN 23
KW HOURS 22
I-ii
parameters (continued)
KWH DMD* MAX 22
operating 23
PASSWORD 23
PT PRIMARY 21, 23
PT SECONDARY 23
RESET MIN/MAX? 22, 23
REV DATE 22, 23
SERIAL NUMBER 23
SOFTWARE VER 22
STATUS FLAGS 22, 23
UNIT ID 22, 23
USING PT’S? 23
V MODE 23
VT SECONDARY 21
PASSWORD 23
password
changing 21
entering 21
Phase button 15
phase readings 15
polarity of power readings 18
power functions 16
abbreviations 17
power supply 3
primary rating 21
programming
local 2
Programming mode 19
PT PRIMARY 21, 23
PT SECONDARY 23
R
real-time demand 27
reset function 22
RESET MIN/MAX? 22, 23
resetting real-time demand 27
REV DATE 22, 23
RS-485 29
S
selecting
current transformer 4
voltage transformer 3
SERIAL NUMBER 23
service
field 31
setting
communications parameters 22
current transformer primary rating 21
volts mode 22
single phase, three-wire system 12
sliding-window demand 27
SOFTWARE VER 22
startup 21
STATUS FLAGS 22, 23
Siemens Power Transmission & Distribution LLC
Index
synchronizing sliding-window demand 27
system applications 2
system status 22
T
technical specifications 35
temperature 3
test block termination 14
three-phase delta system 10
three-phase, wye (star) systems 5
troubleshooting 33
communications 33
display 33
readings 33
U
UNIT ID 22, 23
updating software 29
USING PT’S? 23
V
V MODE 23
validation 31
version check 22
voltage inputs 21
voltage transformer
selection 3
voltage transformer selection 3
volts mode 22
VT connection 21
VT SECONDARY 21
W-Z
wiring 3
overview 3
wiring diagrams
four-wire wye, 2 1/2-elements with two VTs 8
four-wire wye, three element direct connection 6
four-wire wye, three element with three VTs 7
three-wire delta, 2 1/2 elements with two VTs
and three CTs 10
three-wire delta, 2 1/2-elements with two VTs
and two CTs 11
three-wire single phase, two elements direct
connection 12
three-wire wye, three elements direct connection 9
Siemens Power Transmission & Distribution LLC
I-iii
Index
I-iv
Siemens Power Transmission & Distribution LLC
Siemens Power Transmission &
Distribution LLC
P.O. Box 29503
Raleigh, NC 27626-0503
Manual No. SGIM-6038E (Replaces SG6038-03) 2MTD 0997
Printed in U.S.A.
© 1997 Siemens Power Transmission & Distribution LLC
SIEMENS is a registered trademark of Siemens AG.