Current and Energy Measurement Technology

Current and Energy Measurement Technology –
Efficiency Is That Easy!
Product Overview
Content
WAGO Energy Management
4
Current Transformers Selection Guide
8
Power and Energy Measurement
10
Voltage Taps
12
Plug-In Current Transformers with CAGE CLAMP® Connection Technology
14
Split-Core Current Transformers
18
Plug-In Current Transformers with picoMAX® Pluggable Connector
20
Line Length Calculation for Current Transformers
22
Terminal Block Assemblies for Current and Voltage Transformers
24
High-Current, Rail-Mount Terminal Blocks up to 185 mm2
26
Current and Voltage Tap
28
Rogowski Coils
30
Signal Conditioners and Isolation Amplifiers
32
Intelligent Current Sensors
36
Measurement Methods
38
Glossary40
WAGO ENERGY MANAGEMENT –
THE RIGHT SOLUTION FOR EVERY STEP
With Our Modern Energy Data Collection
Transparency Pays Back
Complementary electricity and energy measurement solutions enable comprehensive consumption
recording to create a base for determining relevant
efficiency ratios. It is only through this transparency
that potential savings can be discovered and,
through appropriate measures, considerable cost
savings can be realized. This is also particularly
important for large-scale consumers, such as the
press or body shop in an auto plant.
Measuring –
Systematically Record Energy Consumption
Anywhere high currents must be measured and processed, plug-in current transformers are always the
first choice. If existing systems will be retrofitted,
save time by using Rogowski coils to avoid disassembling cables or interrupting processes.
4
CONVERTING
Cloud Connectivity
(via MQTT)
PARAMETER SETTING
VISUALIZING
EVALUATING
Evaluating –
Identifying and Planning Energy Use
MEASURING
Three standard operation 3-phase power measurement modules within the WAGO-I/O-SYSTEM 750 are available for recording and evaluating
all relevant metrics from a three-phase supply
network. An extreme operation (XTR) variant is
also available for harsh applications. This allows
comprehensive network analysis to be performed
and the power supply for machine drives to be
optimally controlled, helping prevent damage,
machine failures and downtime.
Parameterization and Visualization
Software solutions for the WAGO-I/O-SYSTEM
and WAGO’s signal conditioners make parameterization and visualization as simple as child’s
play via the new WAGO Energy Data Management
Application.
Cloud Connectivity
The MQTT software extension for the PFC100
and PFC200 Controllers allows data to be easily
transmitted from the field level to the cloud. You
can decide whether the controller sends the data
to Microsoft Azure, Amazon Web Services, or IBM
Bluemix.
5
WAGO ENERGY MANAGEMENT:
ONE SOLUTION – MANY APPLICATIONS
This user-friendly solution, consisting of software
combined with a modular control system, records
measurement data from different media and
influencing factors for energy monitoring and
processes them for further analyses, archiving
and reporting.
With the PFC200 Application Controller
(750-8202/000-022), data from meters and sensors can be easily collected by one convenient
input module and parameterized through the available software application – no cumbersome and
complicated programming.
ADVANTAGES:
• Modular energy and process data collection, management and visualization
User-friendly energy data evaluation and derivation of efficiency plans
• Easy input parameterization via Web visualization
No programming experience required
• Establish indicators to achieve DIN EN ISO 50001
Economical alternative to energy management software
• Connect existing sensors to the WAGO-I/O-SYSTEM
Integrates into existing systems for flexibility and maximum return on investment
Find out more here:
www.wago.com/energiemanagement/de
Easy parameter setting –
not programming
6
Computer
Database
ETHERNET
WAGO-I/O-SYSTEM 750
750-820x/
000-022
Record virtually all relevant
metrics like gas, heat,
water, compressed air,
temperature and electrical
energy in industrial and
process technologies or
building applications.
DI
DI
DO
15-minute pulse
(power supply)
S0 counter,
pulse counter
AI
3-PH
Flow, pressure,
temperature, etc.
Current and voltage
measurement
Power on/off
EnOcean
M-Bus
The data can be transferred to higher level
energy management software via MODBUS
TCP/IP or as a CSV file via FTP/FTPS. In
addition, it is possible to save history on an
SD card. Because it is so easy to integrate
the versatile new WAGO solution into
existing systems, adapting to individual
requirements is also quite simple. With the
integrated visualization tool, collected data
are readily displayed and evaluated in various forms such as bar or line graphs.
PFC200 Application Controller
(750-8202/000-022)
7
CURRENT TRANSFORMERS SELECTION GUIDE
The Right Solution for Every Application
855 Series
Current Transformers
Split-Core Current Transformers
Plug-In Current Transformers
with CAGE CLAMP® Connection Technology
Application
Retrofits
New systems
Coil bobbin
Separable
Closed
Connection technology
Connection cable
(color coded)
CAGE CLAMP®
Mounting
Round cable (insulated),
copper current bar (insulated)
Round cable, copper current bar, DIN-rail,
mounting plate
750-493, (750-493/000-001)
750-494, (750-494/000-001)
750-495, (750-495/000-001)
857-550
Compatibility with other
WAGO components
Primary rated current
60 … 1000 A
50 … 2500 A
Secondary rated current
1 A / 5 A
1 A / 5 A
Accuracy class
0.5; 1 or 3
1 or 3
Ambient operating
temperature
−10 … +55 °C
−5 … +50 °C
Standards
EN 61869-2
EN 61869-2
Approvals
–
Y
Connection examples
*In the measurement range 0.8 to 32 A and in combination with WAGO’s 3-phase power measurement modules,
the accuracy class 0.5 is met per EN 61869-2.
8
Plug-In Current Transformers
with a picoMAX® Pluggable Connector
Rogowski Coils RT500/RT2000
Rogowski Coils
RC 70 / RC 125 / RC 175
New systems
Retrofits
Retrofits
Closed
Separable
Bayonet connector, separable
picoMAX®
Connection cable
Connection cable
Round cable, DIN-rail,
mounting plate
Round cable (insulated),
copper current bar (insulated)
Round cable,
copper current bar
750-493
750-494
750-495
857-550
750-495/000-002
857-552
789-652 / 789-654
750-495/000-002
857-552
32 A
35 / 64 A
Up to 2000 A
Up to 4000 A
320 mA
1A
(up to 40.02 mV)
22.5 mV / kA
0.5*
1
–
1
−10 … +55 °C
−40 … +80 °C
−40 … +80 °C
EN 61869-2
IEC 61010-1
IEC 61010-1 / EN 61869-2
Y
UL pending
–
Y
9
POWER AND ENERGY MEASUREMENT
With the WAGO-I/O-SYSTEM 750 and 750 XTR
The I/O modules for three-phase power measurement record and process all relevant metrics from
a three-phase supply network. They provide system operators with increased insight into energy
consumption by specific machines and systems,
as well as the ability to perform comprehensive
network analysis.
ADVANTAGES:
• Measure machine and system energy consumption values
• Measures and processes all relevant measured
variables
• Comprehensive network analysis
• Connection to the WAGO-I/O-SYSTEM:
fieldbus-independent, compact and flexible
• The dark gray modules from the 750 XTR
Series can also be used in eXTReme environments and offer these advantages:
– eXTReme temperatures from −40 to +70 °C (−40 ... +158 °F)
– eXTReme isolation up to 5 kV of
impulse voltage
- eXTReme vibration resistance up to 5g of acceleration
Image
Energy consumption



Voltage
3~ 480 V
3~ 480 V
3~ 480 V/690 V
Current
1 A (750-493)
5 A (750-493/000-001)
1 A (750-494)
5 A (750-494/000-001)
External shunts (750-494/000-005)
1 A (750-495)
5 A (750-495/000-001)
Rogowski coil (750-495/000-002)
Active power/energy



Phase position



Reactive power/energy
via function block


Apparent power/energy
via function block




Rotary field detection
Power factor
()


Frequency measurement



Four-quadrant operation
(inductive, capacitive, consumer,
generator)


Harmonic analysis
(up to the 41st harmonic)


Neutral conductor measurement

Other product variants
Extended temperature range:
−20 … +60 °C (−4 ... +140 °F)
750-494/025-000 (1 A),
750-494/025-001 (5 A)
750 XTR:
750-495/040-000 (1 A),
750-495/040-001 (5 A),
750-495/040-002 (Rogowski coil)
Housing width
12 mm (0.472 in.)
12 mm (0.472 in.)
24 mm (0.945 in.)
Item number
750-493
750-494
750-495
10
General Configurations
Power and energy measurement of a machine in a 480 VAC
mains network via three-phase power measurement module
(750-493, 750-494)
General Configurations
Power, energy and N-conductor measurement of a machine
in a 480/690 VAC mains network via three-phase power measurement module (750-495)
L1
L2
L3
N
L1
L2
L3
N
L1
IL1
L2
IL2
L3
IL3
N
IN
L1
L1
IL1
L2
L2
IL2
L3
L3
IL3
N
N
L1
L2
L3
Application
Direct connection of Rogowski coils to
the three-phase power measurement
module (750-495/000-002)
IN
N
L1
L2
Machine
L3
Application
Direct connection of external shunts to
the three-phase power measurement
module (750-494/000-005)
Loads
L1
L2
L3
N
N
L3
L2
L1
Machine
Current measurement
(via external shunts)
Z1
Z1
Z1
L1
ON
1 2 3 4 5 6 7 8
L2
L3
N
11
Voltage Taps for Insulated Conductors,
855 Series
N
L3
L2
L1
N
L3
L2
L1
E
F
G
H
N
15 16
A
B
C
D
E
F
G
H
I1+ I1-
L2
I2+ I2-
L3
I3+ I3-
N
IN+ IN-
S1
S2
S1
S2
S1
S2
S1
S2
L1
L1
L3
A
B
C
D
L2
13 14
1 2 3 4 5 6 7 8
ON
PE
Application Example: The Complete Retrofit Solution
750-495
3-Phase Power Measurement Module,
750-495
Terminal Block Assembly,
2007-8874
Split-Core Current Transformers,
855 Series
VOLTAGE TAPS
For Insulated Conductors
ADVANTAGES:
• Faster measurement voltage tapping
with just one turn
• Tool-free assembly
• Conductor contact via IDC connection
• Reliable measurement device and conductor
protection via integrated SIBA fuse
Installation on insulated conductor with IDC connection
Image
Integrated SIBA fuse to protect
equipment and conductor
Conductor Range
2.5 ... 6 mm2 (14 ... 10 AWG)
3 … 5 mm Ø
Feedthrough for Measurement
Conductor
10 ... 16 mm2 (8 ... 6 AWG)
Ø 5 … 7 mm
(feedthrough for measurement
conductor)
12
Fuse
Cable Length
Mounting
2 A, 450 V, F, 70 kA
(5 x 25 mm)
–
Watch the video
to learn more.
Item Number
855-8001
3 m
(pre-assembled)
Conductor contact via IDC
connection
855-8002
2 A, 450 V, F, 70 kA
(5 x 25 mm)
855-8003
–
855-8004
Voltage Taps,
855 Series
N
L3
L2
L1
N
L3
L2
L1
E
F
G
H
N
15 16
A
B
C
D
E
F
G
H
I1+ I1-
L2
I2+ I2-
L3
I3+ I3-
N
IN+ IN-
S1
S2
S1
S2
S1
S2
S1
S2
L1
L1
L3
A
B
C
D
L2
13 14
1 2 3 4 5 6 7 8
ON
PE
Application Example: The Complete Retrofit Solution
750-495
3-Phase Power Measurement Module,
750-495
Terminal Block Assembly,
2007-8874
Plug-In Current Transformers with CAGE CLAMP®,
855 Series
VOLTAGE TAPS
For Busbars
Installation on busbar;
fastening with Allen wrench
Integrated SIBA fuse (overload
and short circuit protection)
Conductor termination via
Push-in CAGE CLAMP®
connection technology
Various marking options for
clear identification
Image
Fuse
2 A, 450 V, F, 70 kA
(5 x 25 mm)
ADVANTAGES:
• Fast, easy installation to live busbar with clamp
mount or M6/M8 mount
• Various marking options for clear identification
• Universal conductor termination via Push-in
CAGE CLAMP® connection technology
• Fused voltage path protects downstream
measurement devices
Connection Technology
Solid-/Fine-Stranded
Push-in CAGE CLAMP®
(WAGO 2624 Series)
Mounting
Item Number
M6 mount
855-8006
M8 mount
855-8008
Clamp mount
(4 … 15 mm/
0.157 ... 0.591 in.
bar thickness)
855-8015
13
PLUG-IN CURRENT TRANSFORMERS
With CAGE CLAMP® Connection Technology
ADVANTAGES:
• Screwless CAGE CLAMP® connection technology
• Primary currents 50 to 2500 A / secondary currents 1 A or 5 A
• Continuous overload of 120% the nominal primary current
• Tool-free installation via quick-mount kit
• Low-voltage current transformer for max. operating voltages up to 1.2 kV
• UL certified (Certificate No. E356480)
• EN 61869-1/EN 61869-2
Conductor termination
14
Watch the video to
learn more.
CAGE CLAMP® connection
Time-Saving Installation with Plug-in Current Transformers from WAGO
Quick-Mount Kit, 855-9910
Mounting on round cable
Mounting on DIN-rail via carrier rail adapter
Secured to mounting plate
Mounting on copper DIN-rail
Y
15
PLUG-IN CURRENT TRANSFORMERS
With CAGE CLAMP® Connection Technology
80.9
Image
Current bar 1: 30 x 10 mm
Current bar 2: 25 x 12 mm
Current bar 3: 20 x 20 mm
91.15
Round cable: 26 mm
Busbar 1: 40 x 10 mm
Primary Rated
Current
Secondary Rated
Current
Rated Power
Accuracy
Class
Item Number
50 A
1A
1.25 VA
3
855-301/050-103
50 A
5A
1.25 VA
3
855-305/050-103
60 A
1A
1.25 VA
1
855-301/060-101
60 A
5A
1.25 VA
1
855-305/060-101
75 A
1A
2.5 VA
1
855-301/075-201
75 A
5A
2.5 VA
1
855-305/075-201
100 A
1A
2.5 VA
1
855-301/100-201
100 A
5A
2.5 VA
1
855-305/100-201
150 A
1A
5 VA
1
855-301/150-501
150 A
5A
5 VA
1
855-305/150-501
200 A
1A
5 VA
1
855-301/200-501
200 A
5A
5 VA
1
855-305/200-501
250 A
1A
5 VA
1
855-301/250-501
250 A
5A
5 VA
1
855-305/250-501
300 A
5A
5 VA
1
855-305/300-501
400 A
1A
10 VA
1
855-301/400-1001
400 A
5A
10 VA
1
855-305/400-1001
600 A
1A
10 VA
1
855-301/600-1001
600 A
5A
10 VA
1
855-305/600-1001
250 A
1A
5 VA
1
855-401/250-501
250 A
5A
5 VA
1
855-405/250-501
400 A
1A
5 VA
1
855-401/400-501
400 A
5A
5 VA
1
855-405/400-501
600 A
1A
5 VA
1
855-401/600-501
750 A
5A
5 VA
1
855-405/750-501
Busbar 2: 30 x 15 mm
Round cable: 32 mm
Accessories
16
Item Number
Carrier Rail Adapter for Plug-In Current Transformers
(for 855-3xx/xxxx-xxxx and 855-4xx/xxxx-xxxx)
855-9900
Quick-Mount Kit
(2 pieces including cable tie)
855-9910
105.25
Image
Busbar 1: 50 x 12 mm
Busbar 2: 40 x 30 mm
Primary Rated
Current
Secondary Rated
Current
Rated Power
Accuracy Class
Item Number
400 A
1A
10 VA
1
855-501/400-1001
400 A
5A
10 VA
1
855-505/400-1001
600 A
1A
10 VA
1
855-501/600-1001
600 A
5A
10 VA
1
855-505/600-1001
800 A
1A
10 VA
1
855-501/800-1001
800 A
5A
10 VA
1
855-505/800-1001
1000 A
1A
10 VA
1
855-501/1000-1001
1000 A
5A
10 VA
1
855-505/1000-1001
1500 A
1A
5 VA
1
855-601/1500-501
1500 A
5A
5 VA
1
855-605/1500-501
1000 A
1A
10 VA
1
855-801/1000-1001
2000 A
1A
10 VA
1
855-801/2000-1001
2000 A
5A
10 VA
1
855-805/2000-1001
2500 A
1A
10 VA
1
855-1001/2500-1001
2500 A
5A
10 VA
1
855-1005/2500-1001
114.85
Round cable: 44 mm
Busbar 1: 63 x 10 mm
Busbar 2: 50 x 30 mm
134.4
Round cable: 44 mm
Busbar 1: 80 x 10 mm
Busbar 2: 60 x 30 mm
147.45
Round cable: 55 mm
Busbar 1: 100 x 10 mm
Busbar 2: 80 x 30 mm
Round cable: 70 mm
17
SPLIT-CORE CURRENT TRANSFORMERS
Retrofit Existing Systems
ADVANTAGES:
• No measuring cable interruption
• Primary currents 60 to 1000 A / secondary currents 1 or 5 A
• Compact, dividable housing means fast and easy mounting for retrofits
• Transformer leg (855-5xxx) can be completely removed if space is tight
• Easy, cost-effective installation via cable ties (included)
• Color-coded connection cables
• EN 61869-1/EN 61869-2
Simple termination!
Quick and easy mounting!
18
Watch the video to
learn more.
Image
Primary Rated
Current
Secondary Rated
Current
Rated Power
Accuracy
Class
Cable
Length
Item Number
60 A
1A
0.2 VA
3
3 m
855-3001/060-003
100 A
1A
0.2 VA
3
3 m
855-3001/100-003
200 A
1A
0.2 VA
1
3 m
855-3001/200-001
250 A
1A
0.2 VA
1
3 m
855-3001/250-001
100 A
1A
0.2 VA
1
3 m
855-4001/100-001
150 A
1A
0.2 VA
1
3 m
855-4001/150-001
150 A
5A
1 VA
1
0.5 m
855-4005/150-101
200 A
1A
0.2 VA
0.5
3 m
855-4001/200-001
200 A
1A
0.2 VA
1
3 m
855-4101/200-001
250 A
1A
0.2 VA
1
3 m
855-4101/250-001
250 A
5A
1 VA
1
0.5 m
855-4105/250-101
400 A
1A
0.2 VA
1
3 m
855-4101/400-001
400 A
5A
1 VA
1
0.5 m
855-4105/400-101
250 A
1A
0.5 VA
1
5 m
855-5001/250-001
400 A
1A
0.5 VA
0.5
5 m
855-5001/400-000
400 A
5A
0.5 VA
1
3 m
855-5005/400-001
600 A
1A
0.5 VA
0.5
5 m
855-5001/600-000
600 A
5A
0.5 VA
0.5
3 m
855-5005/600-000
1000 A
1A
0.5 VA
0.5
5 m
855-5001/1000-000
1000 A
5A
0.5 VA
0.5
3 m
855-5005/1000-000
1000 A
1A
0.5 VA
0.5
5 m
855-5101/1000-000
1000 A
5A
0.5 VA
0.5
3 m
855-5105/1000-000
Ø 18 mm
Ø 18 mm
Ø 28 mm
Ø 42 mm
Ø 2 x 42 mm
19
PLUG-IN CURRENT TRANSFORMERS
With picoMAX® Pluggable Connector
With 1 A Output
ADVANTAGES:
• Converts 64 A or 35 A to 1 A
• Accuracy class 1 per EN 61869-2
• Mount on DIN-rail or panels via carrier rail adapter
• UL certified (Certificate No. E356480)
Watch the video to
learn more.
Y
Mounting
Just snap together.
Use carrier rail adapter to snap to DIN-rail.
As a space-saving option, mount directly
above circuit breaker.
Conductor Termination
Push-in termination of solid and ferruled
conductors
Image
Universal connection for fine-stranded conductors
Primary Rated
Current
Secondary Rated
Current
Rated Power
Accuracy
Class
Conductor
Hole
Item Number
35 A
1A
0.2 VA
1
Ø 7.5 mm
855-2701/035-001
64 A
1A
0.2 VA
1
Ø 7.5 mm
855-2701/064-001
Carrier Rail Adapter
20
855-9927
With Low Power Output
ADVANTAGES:
• First transformer with lower power output
• Specifically designed for converting low currents from 32 A to 320 mA
• Complies with accuracy class 0.5 per EN 61869-2 in the measurement
range of 0.8 to 32 A and in combination with WAGO’s 3-Phase Power
Measurement Module
Watch the video
to learn more.
Mounting
Just slide together.
Side-by-side assembly
To save space, mount directly above circuit
breaker.
Conductor Termination
Push-in termination of solid and ferruled
conductors
Image
Universal connection for fine-stranded conductors
Primary Rated
Current
Secondary Rated
Current
Rated Power
Accuracy
Class
Conductor
Hole
Item Number
32 A*
320 mA
0.1 Ω
0.5**
Ø 5.0 mm
(0.197 in.)
855-1700/032-000
*Measurement range: 0.8 to 32 A in combination with the three-phase power measurement modules (750-493/494/495)
**Testing adheres to EN 61869-2 with a conversion ratio of 16 A/0.16 A (accuracy class: 0.5) and an extended primary current of 200%
21
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LINE LENGTH CALCULATION
FOR CURRENT TRANSFORMERS
Refined Solution for Your System Planning
To determine actual power requirements, both
the power requirements of the connected measurement devices and the power losses from the
measurement lines connected to a transformer‘s
secondary circuit must be taken into account.
The interface configuration software’s new feature quickly
and easily calculates cable length and provides the results
for your system documentation.
WAGO Interface Configuration Software Start Screen
22
Cable length calculation using WAGO Interface Configuration Software
Simply documented!
Power calculation of copper cables between measurement device and current transformer:
PV=
I S2 x 2 x l
ACU x 56
VA
I S
l
ACU
PV
= Secondary rated measuring current strength [A]
= Simple cable length in m
= Cable cross-section in mm²
= Power loss of connection cables
Note: When using a common three-phase return line, the values for PV are halved.
Current transformer 5 A
PV=
Example:
A 1 amp or 5 amp current transformer is used,
with an ammeter on the secondary circuit, at a
distance of 10 m between the transformer and
the measurement device.
52 x 2 x 10
= 5.96 VA
1.5 x 56
Current transformer 1 A
PV=
12 x 2 x 10
1.5 x 56
VA = 0.24 VA
Free software download at:
www.wago.com/configuration-software
23
TERMINAL BLOCK ASSEMBLIES FOR CURRENT
TRANSFORMERS AND VOLTAGE TAPS
For Fast and Easy Connections
13 14
A
B
C
D
E
F
G
H
L3
L2
I-S2
L1
k-S1
L2
S2
L3
S1
IN
750-493
k-S1
S1
IL3
N IN
N
k-S1
I-S2
S2
L3 IL3
L3
L1
IL2
I-S2
S2
L2
N
IL1
L2 IL2
PE
N
L3
L2
L1
S1
L1
PE
L1 IL1
3-Phase Power Measurement Module,
750 Series
Terminal Block Assemblies for Current
Transformers and Voltage Taps
Current Transformers, 855 Series
Pre-assembled terminal block assembly for easily
connecting and short circuiting current transformers, suitable for three-phase power measurement
modules (750-495 and 750-494)
S1
S2
S1
S2
S1
S2
L1
L2
L3
N
PE
Compact terminal block for current transformer circuit, 2007-8873
Connection option for current and voltage, including ‘Y’ point jumper
24
S1
S2
S1
S2
S1
S2
2007-8875
Connection option for current and voltage,
including ‘Y‘ point jumper
Watch the video
to learn more.
N
IN+ IN-
L3
N
PE
L2
L1
S1
IL3
IL3
IN
IN
750-495
I-S2
L2
S2
I3+ I3-
IL2
IL2
L1
k-S2
L3
S1
L3
S2
I2+ I2-
k-S1
S2
L2
IL1
IL1
k-S1
I-S2
N
S1
L2
E
F
G
H
I1+ I1-
k-S1
I-S2
S2
L1
A
B
C
D
N
E
F
G
H
L1
I-S2
S1
A
B
C
D
15 16
L3
13 14
PE
N
L3
L2
L1
ADVANTAGES:
• Neutral bridging
• Easy and clear wiring
• Short-circuiting of current transformers
• Test sockets for control measurements
• Visible current and voltage path separation
3-Phase Power Measurement Module,
750 Series
Terminal Block Assemblies for Current Transformers and Voltage Taps
Current Transformers, 855 Series
Pre-assembled terminal block assembly for easily connecting and short circuiting current transformers, suitable for
three-phase power measurement modules (750-495)
S1
S2
S1
S2
S1
S2
S1
S2
L1
L2
L3
N
PE
Compact terminal block for current transformer circuit, 2007-8874;
connection option for current and voltage
S1
S2
S1
S2
S1
S2
S1
S2
Compact terminal block for current transformer circuit,
2007-8877; connection option for current
25
HIGH-CURRENT, RAIL-MOUNT TERMINAL BLOCKS
UP TO 185 mm2 (350 KCMIL)
The Ideal Addition to Current Measurement with Plug-In Transformers
Fast Termination
• Eliminate time-consuming
preparation – no ring terminals or ferrules required
Always Reliable
• Perfect clamping force –
independent of operator
skill
Suitable for All
Applications
• Meet the most stringent requirements,
including those specified for railway and
marine applications
• Material durability at
high and low external
temperatures
Easy Termination
• Side-entry conductor
termination
• Orange locking tab
keeps the clamp open
for hands-free wiring
285 Series Item Number
Designation
35 mm2 (2 AWG)
50 mm2 (1/0 AWG)
Conductor range
6 … 35 mm2
10 … 2 AWG
10 … 50 (70 “f-st”) mm2 25 ... 95 mm2
8 … 1/0 AWG
4 … 4/0 AWG
50 … 185 mm2
1/0 AWG … 350 kcmil
(ground per standard max. 120 mm2
/ 250 kcmil)
Nominal current IN
125 A
150 A
232 A
353 A
Through terminal block
285-135
285-150
285-195
285-1185
Rated voltage
1000 V
Through terminal block
285-134
Ground conductor terminal block
285-137
Adjacent jumper*
Step-down jumper (for TOBJOB® S, 10/16 mm )
2
Power tap*
285-435
285-430
1000 V
285-154
285-157
285-450
-
95 mm2 (4/0 AWG) 185 mm2 (350 kcmil)
1000 V
285-194
285-197
285-495
-
1000 VAC/DC, 1500 VDC
285-1184
285-1187
285-1171
-
285-427
285-447
285-407
285-1175
285-139
285-159
285-199
285-1169
Warning cover
285-420
285-440
285-170
285-1177
Marking strip (reel)
2009-110
2009-110
2009-110
2009-110
Three phase set (without DIN-rail and marking accessories)
Shock protector
Marker carrier
WMB Inline markers (reel)
WMB Multi marking system (for 5 … 5.2 mm)
285-421
285-442
2009-115
793-5501
285-441
285-442
2009-115
793-5501
*For more technical data, see our Full Line Catalog, Volume 1, or visit http://eshop.wago.com.
26
285-169
285-442
2009-115
793-5501
285-1178
-
2009-115
793-5501
The power tap is inserted into the jumper contact
slot. It can be fitted with a strain relief plate (for 35 mm2
high-current, rail-mount terminal blocks).
Power tap provides safe and easy power distribution to additional
loads. The tap is inserted when the spring is retracted – without
connected conductor (for 50mm2/1/0 AWG to 185 mm2 /350 kcmil)
high-current, rail-mount terminal blocks).
855-xxx
S1
S2
S1
S2
S1
S2
L1
L2
L3
N
PE
ON
open
open
open
1 2 3 4 5 6 7 8
285-195
open
open
open
285-407
13 14
A
B
C
D
E
F
G
H
L1 IL1
L2 IL2
L3 IL3
N IN
L1
L2
L3
27
CURRENT AND VOLTAGE TAP
The 2-in-1 Solution
A combination of current transformer and
voltage tap, the current and voltage tap (can
be quickly and easily mounted into the jumper
slot of a two-conductor through terminal block
(95 mm²/4/0 AWG, 285-195). This combination fits
perfectly into a successful energy management
plan.
Output – Voltage
• Redundant design
Output – Current
• Energy measurement device connection
(1A)
• Short-circuiting the current transformer
• Neutral bridging
Fuse Protection
Marking Possibility
• TOPJOB® S Marking Strips
• WMB Multi Marking System
Feedthrough for
Primary Conductors up to 95 mm2/4/0 AWG
855-951/250-000
Technical Data for Current and Voltage Taps (855-951/250-000)
Primary rated current Ipri
250 A
Secondary rated current Isec
1A
Accuracy class
0.5
Rated power Sr
0.2 VA
Rated voltage
690 VAC
Fuse
2 A, 450 V, F, 70 kA (5 x 25 mm)
Feedthrough for measurement conductor
∅ 16.0 mm (0.630 in.)
28
Current and voltage can be measured
directly at the supply with the current
and voltage tap (855-951/250-000)
and the two-conductor through
terminal block
(95 mm²/4/0 AWG, 285-195)
ADVANTAGES:
• Power data can be directly tapped into the power supply
• Easy installation – simply insert the tap into the jumper slot of the twoconductor through terminal block (95 mm²/4/0 AWG) with
POWER CAGE CLAMP
• Integrated 250 A/1 A current transformer
• Complies with accuracy class 0.5 per EN 61869-2 for exact measurement
results
• Fused voltage path protects downstream measurement devices
ON
Visualization
and Configuration
1 2 3 4 5 6 7 8
open
Evaluation
open
open
open
open
Measurement
Watch the video to
learn more.
open
open
open
open
open
Power Supply
29
ROGOWSKI COILS
For Quick, Easy Retrofit of Existing Systems
ADVANTAGES:
• Rated insulation voltage:
1000 V Cat. III / 600 V Cat. IV
• Accuracy class 1 per EN 61869-2
• IP67 protection class
• Ambient temperature: −40 … +80 °C
• UL certified
Image
Description
Rogowski coils RC-070
Rogowski coil RC-125
Rogowski coil RC-175
Rogowski coil RT-500
Rogowski coil RT-2000
Watch the video to
learn more.
Cable Length
1.5 m (59.06 in.)
4.5 m (0.177 in.)
1.5 m (59.06 in.)
4.5 m (0.177 in.)
1.5 m (59.06 in.)
4.5 m (0.177 in.)
1.5 m (59.06 in.)
3.0 m (118.11 in.)
1.5 m (59.06 in.)
3.0 m (118.11 in.)
Feedthrough for Measurement Conductor
Ø 70 mm (2.756 in.)
Ø 125 mm (4.921 in.)
Ø 175 mm (6.890 in)
Ø 55 mm (2.165 in.)
Ø 125 mm (4.921 in.)
*The specifications for the primary rated current refer to a combination with the WAGO Modules (857-552 and 750-495/000-002).
Rogowski technology allows the coils to measure a wide primary current range of up to 10,000 A without loss of accuracy,
because there are no saturation effects with this technology.
30
Easy to Use:
• Rogowski coil diameter:
70, 125 or 175 mm
• Length of signal line: 1.5 m or 4.5 m
• Sealable bayonet connector
• Anchor points for cable ties
Bayonet connector:
Robust and durable
Anchor points:
Quick and easy mounting
with cable ties
Lock-out seal option:
Higher security via sealable
bayonet lock
Direct connection of Rogowski
coils to the three-phase power
measurement module
(750-495/000-002)
ON
L3
L2
L1
1 2 3 4 5 6 7 8
N
Y
Primary Rated Current*
Output Signal
Accuracy Class**
4000 AAC
22.5 mV / kA
at 50 Hz
1
4000 AAC
22.5 mV / kA
at 50 Hz
1
4000 AAC
22.5 mV / kA
at 50 Hz
1
500 AAC
10.5 mV / 500 A
at 50 Hz
-
2000 AAC
40.2 mV /2000 A
at 50 Hz
-
Item Number
855-9150/2000-0701
855-9450/2000-0701
855-9150/2000-1251
855-9450/2000-1251
855-9150/2000-1751
855-9450/2000-1751
855-9100/500-000
855-9300/500-000
855-9100/2000-000
855-9300/2000-000
**per EN 61869-2
31
SIGNAL CONDITIONERS AND ISOLATION AMPLIFIERS
Current and Voltage Signal Conditioners
Description
Image
Circuit Diagram
Input
Output
Current and Voltage Signal Conditioners
12
11
14
OUT+
OUT–
4.1
4.2
Us+
GND
4.3
4.4
Us+
GND
6.1
6.2
0 … 10 mA
2 … 10 mA
0 … 20 mA
4 … 20 mA
1 A AC/DC
5 A AC/DC
0 … 10 mA
2 … 10 mA
0 … 20 mA
4 … 20 mA
Rogowski
coils
500 AAC
2000 AAC
4000 AAC
0 … 10 mA
2 … 10 mA
0 … 20 mA
4 … 20 mA
Voltage Signal Conditioner
300 VAC/DC
0 … 10 mA
2 … 10 mA
0 … 20 mA
4 … 20 mA
Power Signal Conditioner
300 VAC/DC
(5 A)
0 … 10 mA
2 … 10 mA
0 … 20 mA
4 … 20 mA
Current Signal Conditioner
RELAY
2.2 DO (GND)
DO
INPUT CURRENT (AC/DC)
3.1
3.2
DO
GND
JUMPER
POWER
JUMPER
DO
IN 1A (GND 1)
1
IN 5A (GND 1)
2
DO (GND 3)
IN
3 DO
GND 1 4
Rogowski Coil Current
Signal Conditioner
RC1+ (GND 1) 1
GND 1 2
Millivolt Signal Conditioner
IN
RC2+ (GND 1) 3
DO (GND 3) 4 DO
IN+ 1
IN– 2
N.C. 3
N.C. 4
32
OUTPUT
POWER
AC/DC
100 A
Through-Hole Current
Signal Conditioner
Current and Voltage Signal Conditioners
1.1
1.2
1.3
IN
mV
OUT
5 OUT+
6 GND 2
7 Us+
POWER
8 GND 3
OUT
5 OUT+
6 GND 2
7 Us+
POWER
8 GND 3
OUT
U,I
5 OUT+
6 GND 1
7 Us+
POWER
8 GND 2
0 … 200 mV
0 ... 1000 mV
±100 mV
0 … 10 mA
2 … 10 mA
0 … 20 mA
4 … 20 mA
Current
Digital output (DO)
Voltage
Clipping capability
Bipolar signals
Current and voltage
Zero/span adjustment
Output
0…5V
1 … 5 V
0 … 10 V
2 … 10 V
Special Functions
±10 mA
±20 mA
±5 V
±10 V
0…5V
1 … 5 V
0 … 10 V
2 … 10 V
0…5V
1 … 5 V
0 … 10 V
2 … 10 V
0…5V
1 … 5 V
0 … 10 V
2 … 10 V
0…5V
1 … 5 V
0 … 10 V
2 … 10 V
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
0…5V
1 … 5 V
0 … 10 V
2 … 10 V
x
Configuration
x
Power Supply
x
Item Number
24 VDC
2857-550
x
24 VDC
857-550
x
x
24 VDC
857-552
x
x
x
24 VDC
857-560
x
x
x
x
24 VDC
857-569
x
x
x
x
24 VDC
857-819
Simulation
Interface
configuration
software
Free download
DIP switch
Interface configuration
app
Free download
from Google Play
Store
Supply voltage
Interface configuration
display, 2857-900
33
Signal Conditioners and Isolation Amplifiers
Current and Voltage Signal Conditioners
Power Signal Conditioner,
857-569
L1 N
A
C
B
D
A
C
B
D
A
C
B
D
A
C
D
B
1-phase power
measurement
PLC
Power supply
Voltage Signal Conditioner,
857-560
L1 N
A
B
PLC
Power supply
34
C
D
A
B
C
D
A
B
C
D
A
B
C
D
Voltage measurement
0 … 20 mA
A
B
Current transformer
250 A/1 A
B
A
C
B
D
A
C
B
D
C
D
Current measurement
via plug-in current
transformer
PLC
DO/Alarm indication
24 V/100 mA
L1
A
C
D
RT 500 (500 A)
Power supply
+US
0 … 20 mA
A
B
C
D
A
B
C
D
A
B
C
D
A
B
C
D
-US
DO/Alarm indication
24 V/100 mA
Power supply
0 … 20 mA
A
B
DO/Alarm indication
24 V/100 mA
Emergency power
Rogowski Signal
Conditioner,
857-552
Current measurement
via Rogowski coil
PLC
Rogowski coil
L1
Current Signal
Conditioner,
857-550
A
B
C
D
A
B
C
D
A
B
C
D
Light monitoring
L1
Power supply
C
D
Current Signal
Conditioner,
2857-550
PLC
Power supply
35
© elxeneize/Fotolia.com
INTELLIGENT CURRENT SENSORS
Monitor Solar Plants via MODBUS Communication
ADVANTAGES:
• Wide measurement range for measuring AC and DC current
• Measure line and sum currents for perfect system monitoring
• Easily guide live conductor through current sensor
• Quickly mount to DIN-rail
Addressing
36
Status indicator
Connection to a PERSPECTO® Control Panel
1 … 32 sensors
289-965
RJ-45 Interface Module for
Current Sensor Modules
Power supply
RS-485 serial
interface
E.g., 787-1002
EPSITRON® COMPACT Power
Measurement range
0 … 80 ADC
0 … 140 ADC
AC 0 … 50 A rms
Transmission error
≤ 0.5% of upper-range value
≤ 0.5% of upper-range value
≤ 0.5% of upper-range value
Power supply
12 … 34 V (via RJ-45)
12 … 34 V (via RJ-45)
12 … 34 V (via RJ-45)
Feedthrough
15 mm (for electrical lines)
15 mm (for electrical lines)
15 mm (for electrical lines)
Interface
RS-485
RS-485
RS-485
Protocol
MODBUS over serial line
MODBUS over serial line
MODBUS over serial line
Addressing
1 … 32
1 … 32
1 … 32
Max. bus length
≤ 1200 m
≤ 1200 m
≤ 1200 m
Item number
789-620
789-621
789-622
37
MEASUREMENT METHODS
Iin
Measuring device
Ushunt
Rshunt
B
A
V
Uin
I
Rmeas
I
Iin= Ushunt / Rshunt
High-Side Method
Transformer Principle
Iin
Uin
Rmeas
Measuring device
Ushunt
Rshunt
V
Iin= Ushunt / Rshunt
Low-Side Method
Shunt Measurement (AC/DC)
Current measurement is performed using a lowohm resistor (shunt), which is connected in parallel
to a voltmeter. The current is proportional to the
current measured at the shunt resistor, I = U/R.
The shunt can be located upstream or downstream of the load (high-side/low-side method).
WAGO products are equipped for both methods,
giving users the freedom to decide where the conductor section should be disconnected. In addition
to DC and AC currents, shunt measurements are
also suitable for measuring superimposed signals
(DC + AC). Accuracies of 0.1% and greater can
be achieved. WAGO‘s 855 Series Plug-In Current
Transformers with a predefined division ratio can
be used to expand the measurement range for
pure AC measurements.
38
Shunt Measurement in Combination with Plug-In
Current Transformer (AC)
Plug-In Current Transformers are used at higher
measurement currents. They function based on
the transformer principle and expand the range
of an existing measurement system (usually a
shunt transformer). The number of secondary
windings mirrors the fixed setting of the division
ratio. The electrically isolated output AC is proportional and in phase with the input AC. The measuring error typically lies below 1%.
Hall Effect Sensor
Uout
s
ea
U
Im
U, I
Rogowski Coil
Hall Effect Sensor
Rogowski Coil (AC)
A closed-air coil, i.e., coil without iron core, is applied around the conductor that will be measured.
The AC current flowing through the conductor
induces a proportional voltage in the Rogowski
coil. The output voltage is amplified and conditioned. A measurement error of less than 2% and a
response threshold of only a few amps guarantee
straightforward measurement of high to very high
AC currents.
Hall Effect Sensors (AC/DC)
A soft, magnetic core is wrapped around the
conductor. The core has a small air gap in which
the Hall effect sensor is located. A magnetic flux is
generated in the ring-shaped core by the current
flowing through the conductor. The magnetic flux
also flows through the Hall effect sensor, which
outputs a voltage signal proportional to the current
measured. This signal is prepared and forwarded
for processing. Using the Hall method, different
signals (AC/DC) and measurement ranges can be
mapped, depending on the design. Measurement
accuracy lies between 0.5% and 1%.
Measurement Method
Advantages
Application Areas
Shunt
• Very high accuracy
• Suitable for DC and AC currents
• Integration into control and regulation systems
• Process and energy technology
Shunt +
Current transformer
• Suitable for higher AC currents
• Potential-free measurement
• Installations and systems technology
• Network monitoring and analysis
Hall effect
• Potential-free measurement
• For higher currents
• DC and AC versions
• PV systems and general energy technology
• Control processing of several individual systems
39
GLOSSARY
S=V*I
S
+
-
+
U
I
-
-
P=UR*IR
S
U
I
Q=UL*IL
+ +
-
-
U
+
-
I
S
40
Apparent Power S
Apparent power (S) is the total power of a transmission network. It is composed of active power
(P) and reactive power (Q). Positive apparent power,
which is in the interest of the consumer, means
that the power is drawn from the grid. Negative
apparent power, however, means that power is fed
back into the grid.
Active Power P
The active power (P) is the power actually consumed. It has no phase shift between current
and voltage and relates to a resistive load. For an
alternating voltage, the active power results from
the multiplication of the RMS values for current
and voltage.
Reactive Power Q
Reactive power (Q) refers to a load on the power
grid, which acts against the power flowing from
the producer to the consumer. Reactive power is
the product of voltage and current flowing through
a reactance. Reactive power is generated by any
device that is connected to an AC grid. All electrical equipment generates an electromagnetic field
when voltage is applied. The magnetic field is constantly being built up and then dismantled by the
alternating voltage. The energy created when the
field is being dismantled is fed back into the power
grid, increasing the resistance to the current flow.
Fundamental frequency (50 Hz)
Third harmonic (150 Hz)
Addition creates a non-sinusoidal wave form.
Harmonics
Harmonics are currents having frequencies that
are multiples of the 50 Hz fundamental frequency.
The harmonic degree is defined as the relationship
between harmonic and fundamental frequency.
Harmonics are created by devices with non-linear
characteristic curves (e.g., transformers, rectifiers,
televisions, computers, halogen lighting). The
non-sinusoidal currents of these devices result in
a voltage drop in the network impedance, which
distorts the network nominal voltage and affects
operation.
The impacts of harmonics contamination include:
failure of protective devices, thermal overload
and premature aging of electrical equipment,
loss of mechanical stability, performance loss,
measurement errors, higher noise level, hard drive
failures, system crashes, operational breakdowns
and more.
If many devices are operated within a network
that generates the third harmonic, it may result in
a very high current load of the neutral conductor.
Neutral conductor currents caused by harmonics
in TN-C power networks travel within the entire
equipotential bonding system via water/heating
pipes, grounding systems, shields of data lines,
video lines and communication systems. This can
lead to increased corrosion or pitting on piping
systems.
Therefore, continuous harmonics and neutral
conductor analysis are required for guaranteeing
both power supply and overvoltage protection, as
well as fire safety.
41
GLOSSARY
400
Sine current
300
A
200
100
0
3/2T
1/2T
-100
2T
-200
For periodic variables (e.g., sine waves), the
arithmetic mean is zero. For this reason, it is not
meaningful for use with periodic variables, or it
only provides information about a possibly present
constant. For DC variables, the arithmetic mean
value corresponds to the average measured value
viewed over time.
-300
-400
Period
400
Sine
Arithmetic mean value
Mean square current
350
A
300
250
200
150
100
50
0
Irms ≈
42
Period
1
n
n
∑x
i=1
2
i
1/2T
T
Absolute value
of the sine
curve
3/2T
2T
RMS
Arithmetic Mean Value
The arithmetic mean value (also average) is the
sum of all measured values detected and divided
by the number of measured values.
Mean Square Value
The mean square value – RMS (root-mean-square),
also the TRMS (true root-mean-square) – is the
square root of the quotient of the sum of squares
for the measured values and number of measured
values (square root of the average of the measured
value).
In electrical engineering, the effective value of a
periodic quantity corresponds to the effective
value of the DC variable. It is characteristic of the
power transformed in the consumer.
The RMS and TRMS terms are frequently differentiated. This is based on historical context, so that
newer measuring procedures are preferred over
form factor based methods. In principle, WAGO
measures according to the TRMS method. However,
no special differentiation is made, as both terms
describe the same mathematical equation, and
one merely indicates the specific accuracy of the
measurement.
400
80000
200
60000
300
70000
100
0
1/2T
-100
-200
40000
30000
20000
-300
-400
Sampling
50000
10000
Input signal
Digital Processing
During digital processing, the signal is sampled in
defined, very short time intervals (digitized). The
sampled values are processed and, e.g., converted
into an analog standard signal.
Digital processes are becoming increasingly
common, since high reproducibility and signal-authentic mapping can be guaranteed due to high
sampling rates. In addition, further processing or
transmission of the digitized information is easier,
less susceptible to interference and more flexible,
due to the software.
0
Sampled signal
Analog Processing
During analog processing, the input signal is fed
directly to a processing unit and prepared according to a fixed transfer function. The processing
occurs using an operational amplifier (OpAmp) and
a few passive components.
43
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+49 571/ 887 - 44 333
+49 571/ 887 - 844 169
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0888-0599/0205-6901 – CURRENT AND ENERGY MEASUREMENT TECHNOLOGY BROCHURE 2.5 US – 10/2017 – Printed in Germany – Subject to design changes
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Hansastraße 27 · 32423 Minden
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