Camille Bauer CENTRAX CU3000 Application guide

in Bearbeitung Device handbook
CENTRAX CU3000 / CU5000
Operating Instructions CENTRAX CU3000 / CU5000 (2018-11)
Camille Bauer Metrawatt AG
Aargauerstrasse 7
CH-5610 Wohlen / Switzerland
Phone: [phone]
Telefax: [phone]
E-Mail: [e-mail]
http://www.camillebauer.com

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 2/106
Legal information
Warning notices
In this document warning notices are used, which you have to observe to ensure personal safety and to prevent
damage to property. Depending on the degree of danger the following symbols are used:
If the warning notice is not followed death or severe personal injury
will result.
If the warning notice is not followed damage to property or severe
personal injury may result.
If the warning notice is not followed the device may be damaged or
may not fulfill the expected functionality.
Qualified personnel
The product described in this document may be handled by personnel only, which is qualified for the respective
task. Qualified personnel have the training and experience to identify risks and potential hazards when working
with the product. Qualified personnel are also able to understand and follow the given safety and warning
notices.
Intended use
The product described in this document may be used only for the application specified. The maximum electrical
supply data and ambient conditions specified in the technical data section must be adhered. For the perfect and
safe operation of the device proper transport and storage as well as professional assembly, installation,
handling and maintenance are required.
Disclaimer of liability
The content of this document has been reviewed to ensure correctness. Nevertheless it may contain errors or
inconsistencies and we cannot guarantee completeness and correctness. This is especially true for different
language versions of this document. This document is regularly reviewed and updated. Necessary corrections
will be included in subsequent version and are available via our webpage http://www.camillebauer.com.
Feedback
If you detect errors in this document or if there is necessary information missing, please inform us via e-mail to:
[e-mail]

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 3/106
Contents
1. Introduction ....................................................................................................................................................5
1.1 Purpose of this document..........................................................................................................................5
1.2 Scope of supply.........................................................................................................................................5
1.3 Further documents.....................................................................................................................................5
2. Safety notes....................................................................................................................................................6
3. Device overview .............................................................................................................................................6
3.1 Brief description.........................................................................................................................................6
3.2 Available measurement data.....................................................................................................................6
4. Mechanical mounting ....................................................................................................................................7
4.1 CENTRAX CU3000 ...................................................................................................................................7
4.2 CENTRAX CU5000 ...................................................................................................................................8
5. Electrical connections...................................................................................................................................9
5.1 General safety notes..................................................................................................................................9
5.2 Terminal assignments of the I/O extensions ...........................................................................................10
5.2.1 CENTRAX CU3000.........................................................................................................................10
5.2.2 CENTRAX CU5000.........................................................................................................................11
5.3 Possible cross sections and tightening torques ......................................................................................11
5.4 Inputs.......................................................................................................................................................12
5.5 Power supply...........................................................................................................................................24
5.6 Relays......................................................................................................................................................24
5.7 Digital inputs ............................................................................................................................................24
5.8 Digital outputs..........................................................................................................................................25
5.9 Analog outputs.........................................................................................................................................26
5.10 Fault current detection.............................................................................................................................27
5.11 Modbus interface RS485..........................................................................................................................29
5.12 Uninterruptible power supply (UPS)........................................................................................................29
5.13 GPS time synchronization........................................................................................................................30
6. Commissioning ............................................................................................................................................32
6.1 Parametrization of the device functionality..............................................................................................33
6.2 Operating LED (CU5000 only).................................................................................................................33
6.3 Installation check.....................................................................................................................................33
6.4 Ethernet installation.................................................................................................................................35
6.4.1 Settings ...........................................................................................................................................35
6.4.2 Connection of the standard interface..............................................................................................37
6.4.3 Connection of the IEC61850 interface............................................................................................38
6.4.4 MAC addresses ..............................................................................................................................38
6.4.5 Communication tests ......................................................................................................................38
6.4.6 Resetting the communication settings of the CU5000....................................................................39
6.5 Protection against device data changing.................................................................................................39
7. Operating the device....................................................................................................................................40
7.1 Operating elements .................................................................................................................................40
7.2 Selecting the information to display.........................................................................................................40
7.3 Measurement displays and used symbols ..............................................................................................41
7.4 Resetting measurement data ..................................................................................................................43
7.5 Configuration ...........................................................................................................................................43
7.5.1 Configuration at the device................................................................................................................43
7.5.2 Configuration via web browser ..........................................................................................................44
7.6 Monitoring fault-currents..........................................................................................................................46
7.7 Data recording.........................................................................................................................................48
7.7.1 Periodical data ................................................................................................................................48
7.7.2 Events.............................................................................................................................................51
7.7.3 Disturbance recorder ......................................................................................................................52
7.7.4 Micro SD card (CU3000 only).........................................................................................................54
7.8 Timeouts..................................................................................................................................................55
8. CODESYS Quick Start .................................................................................................................................56

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 4/106
8.1 CODESYS development environment.................................................................................................... 56
8.2 CENTRAX device description................................................................................................................. 56
8.3 Create a project ...................................................................................................................................... 57
8.4 CU3000/CU5000 Device tree................................................................................................................. 58
8.5 Selection of the I/O extension modules.................................................................................................. 58
8.6 Using the Modbus master functionality................................................................................................... 59
8.7 Creating the CODESYS application ....................................................................................................... 63
8.7.1 Using remanent variables .................................................................................................................. 63
8.7.2 Using the data logger......................................................................................................................... 63
8.8 Creating own visualizations .................................................................................................................... 65
8.8.1 Adding a visualization to the project................................................................................................ 65
8.8.2 Target visualization (TargetVisu) .................................................................................................... 65
8.8.3 WEB visualizations (WebVisu)........................................................................................................ 66
8.9 Establishing a connection to the device ................................................................................................. 67
8.10 Loading the application to the device...................................................................................................... 68
8.11 Loading the application on-site................................................................................................................ 71
8.11.1 Creating a boot application ............................................................................................................. 71
8.11.2 Deleting the active application ........................................................................................................ 71
8.11.3 Loading the application ................................................................................................................... 71
8.11.4 Starting the application.................................................................................................................... 72
8.11.5 Resetting the active application ...................................................................................................... 72
8.12 Reset ...................................................................................................................................................... 73
8.13 Project management............................................................................................................................... 74
8.14 Services.................................................................................................................................................. 74
8.13 Example projects .................................................................................................................................... 74
9. Service, maintenance and disposal .......................................................................................................... 75
9.1 Calibration and new adjustment ............................................................................................................. 75
9.2 Cleaning.................................................................................................................................................. 75
9.3 Battery..................................................................................................................................................... 75
9.4 Disposal.................................................................................................................................................. 75
10. Technical data ............................................................................................................................................. 76
11. Dimensional drawings................................................................................................................................ 82
Annex.................................................................................................................................................................. 83
A Description of measured quantities.......................................................................................................... 83
A1 Basic measurements.............................................................................................................................. 83
A2 Harmonic analysis .................................................................................................................................. 87
A3 System imbalance .................................................................................................................................. 88
A4 Mean values and trend ........................................................................................................................... 89
A5 Meters..................................................................................................................................................... 90
B Display matrices.......................................................................................................................................... 91
B0 Used abbreviations for the measurements............................................................................................. 91
B1 Display matrices for single phase system .............................................................................................. 95
B2 Display matrices for split-phase (two-phase) systems ........................................................................... 96
B3 Display matrices for 3-wire system, balanced load ................................................................................ 97
B4 Display matrices for 3-wire system, balanced load, phase shift............................................................. 98
B5 Display matrices for 3-wire systems, unbalanced load .......................................................................... 99
B6 Display matrices for 3-wire systems, unbalanced load, Aron............................................................... 100
B7 Display matrices for 4-wire system, balanced load .............................................................................. 101
B8 Display matrices for 4-wire systems, unbalanced load ........................................................................ 102
B8 Display matrices for 4-wire system, unbalanced load, Open-Y............................................................ 103
C Logic functions.......................................................................................................................................... 104
D FCC statement........................................................................................................................................... 105
INDEX................................................................................................................................................................ 106

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 5/106
1. Introduction
1.1 Purpose of this document
This document describes the universal measurement device for heavy-current quantities CENTRAX
CU3000 / CU5000. It is intended to be used by:
•Installation personnel and commissioning engineers
•Service and maintenance personnel
•Planners
Scope
This handbook is valid for all hardware versions of the CU3000 / CU5000. Some of the functions
described in this document are available only, if the necessary optional components are included in the
device.
Required knowledge
A general knowledge in the field of electrical engineering is required. For assembly and installation of the
device knowledge of applicable national safety regulations and installation standard is required.
1.2 Scope of supply
•Measurement device
•Safety instructions (multiple languages)
•Mounting set: 2 mounting clamps (CU3000 only)
•Battery pack (optional, for devices with UPS only)
1.3 Further documents
The following documents are provided electronically via http://www.camillebauer.com/cu3000-en or
http://www.camillebauer.com/cu5000-en :
•Safety instructions
•Data sheet
•Modbus basics: General description of the communication protocol
•Modbus interface CENTRAX CUx000: Register description of Modbus RTU/TCP communication
•IEC61850 interface SINEAX AMx000/DM5000, LINAX PQx000, CENTRAX CUx000

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 6/106
2. Safety notes
Device may only be disposed in a professional manner!
The installation and commissioning should only be carried out by trained personnel.
Check the following points before commissioning:
– that the maximum values for all the connections are not exceeded, see "Technical data"
section,
– that the connection wires are not damaged, and that they are not live during wiring,
– that the power flow direction and the phase rotation are correct.
The instrument must be taken out of service if safe operation is no longer possible (e.g. visible
damage). In this case, all the connections must be switched off. The instrument must be
returned to the factory or to an authorized service dealer.
It is forbidden to open the housing and to make modifications to the instrument. The instrument
is not equipped with an integrated circuit breaker. During installation check that a labeled switch
is installed and that it can easily be reached by the operators.
Unauthorized repair or alteration of the unit invalidates the warranty.
3. Device overview
3.1 Brief description
The CENTRAX CU3000/CU5000 is a comprehensive instrument for the universal measurement and
monitoring in power systems, supplemented by a freely programmable control application based on
CODESYS. A full parameterization of all functions of the device is possible directly at the device (for
versions with display) or via web browser. The control application is created using the CODESYS
development environment, can access all measurement data of the device, process these values logically
and mathematically and pass the results via bus or analog or digital outputs.
Using additional, optional components the opportunities of the device may be extended. You may choose
from I/O extensions, communication interfaces and data logging. The PLC functionality is available in
three performance classes. The nameplates on the device give further details about the present version.
3.2 Available measurement data
The device provides measurements in the following subcategories:
a) Instantaneous values: Present TRMS values and associated min/max values
b) Energy: Power mean-values with trend and history as well as energy meters. With the data logger
option “periodical data” mean-value progressions (load profiles) and periodical meter readings are
available as well.
c) Harmonics: Total harmonic distortion THD/TDD, individual harmonics and their maximum values
d) Phasor diagram: Overview of all current and voltage phasors and phase sequence check
e) Waveform of current and voltage inputs
f) Events: Disturbance recordings if the corresponding option is implemented.

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 7/106
4. Mechanical mounting
Please ensure that the operating temperature limits are not exceeded when
determining the place of mounting (place of measurement).
4.1 CENTRAX CU3000
►The CU3000 is designed for panel mounting
Dimensional drawing CU3000:
See section 11
Panel cutout CU3000
Mounting of the device
The device is suitable for panel widths up to 8mm.
a) Slide the device into the cutout from
the outside
b) From the side slide in the mounting
clamps into the intended openings and
pull them back about 2 mm
c) Tighten the fixation screws until the
device is tightly fixed with the panel
Demounting of the device
The demounting of the device may be performed only if all connected wires are out of service. Remove all
plug-in terminals and all connections of the current and voltage inputs. Pay attention to the fact, that
current transformers must be shortened before removing the current connections to the device. Then
demount the device in the opposite order of mounting.

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 8/106
4.2 CENTRAX CU5000
The device can be clipped onto a top-hat rail according to EN 60715.
Dimensional drawing CU5000: See section 11

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 9/106
5. Electrical connections
Ensure under all circumstances that the leads are free of potential
when connecting them!
5.1 General safety notes
Please observe that the data on the type plate must be adhered to!
The national provisions have to be observed in the installation and material selection of electric lines,
e.g. in Germany VDE 0100 “Conditions concerning the erection of heavy current facilities with rated
voltages below 1000 V”!
Nameplate of a CU3000 with
•Ethernet interface
•Modbus/RTU interface
•4 relay outputs
•4 analog outputs
Nameplate of a CU5000 with
•TFT display
•Ethernet interface
•Modbus/RTU interface
•2 relay outputs
•4 analog outputs
•UPS

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 10/106
Symbol Meaning
Device may only be disposed of in a professional manner!
Double insulation, device of protection class 2
CE conformity mark. The device fulfills the requirements of the applicable EU
directives.
Caution! General hazard point. Read the operating instructions.
General symbol: Power supply
General symbol: Input
General symbol: Output
CAT III
Measurement category CAT III for current / voltage inputs, power supply and relay
outputs
5.2 Terminal assignments of the I/O extensions
5.2.1 CENTRAX CU3000
Function Option 1 Option 2 Option 3 Option 4
2 relay outputs 1.1: 51,52,53
1.2: 55,56,57
2.1: 61,62,63
2.2: 65,66,67
3.1: 41,42,43
3.2: 45,46,47
4.1: 31,32,33
4.2: 35,36,37
2 analog outputs 1.1: 56(+), 57(-)
1.2: 55(+), 57(-)
2.1: 66(+), 67(-)
2.2: 65(+), 67(-)
3.1: 46(+), 47(-)
3.2: 45(+), 47(-)
4.1: 36(+), 37(-)
4.2: 35(+), 37(-)
4 analog outputs
1.1: 56(+), 57(-)
1.2: 55(+), 57(-)
1.3: 52(+), 53(-)
1.4: 51(+), 53(-)
2.1: 66(+), 67(-)
2.2: 65(+), 67(-)
2.3: 62(+), 63(-)
2.4: 61(+), 63(-)
3.1: 46(+), 47(-)
3.2: 45(+), 47(-)
3.3: 42(+), 43(-)
3.4: 41(+), 43(-)
4.1: 36(+), 37(-)
4.2: 35(+), 37(-)
4.3: 32(+), 33(-)
4.4: 31(+), 33(-)
4 digital inputs (active)
1.1: 51(-), 53(+)
1.2: 52(-), 53(+)
1.3: 55(-), 57(+)
1.4: 56(-), 57(+)
2.1: 61(-), 63(+)
2.2: 62(-), 63(+)
2.3: 65(-), 67(+)
2.4: 66(-), 67(+)
3.1: 41(-), 43(+)
3.2: 42(-), 43(+)
3.3: 45(-), 47(+)
3.4: 46(-), 47(+)
4.1: 31(-), 33(+)
4.2: 32(-), 33(+)
4.3: 35(-), 37(+)
4.4: 36(-), 37(+)
4 digital inputs (passive)
1.1: 51(+), 53(-)
1.2: 52(+), 53(-)
1.3: 55(+), 57(-)
1.4: 56(+), 57(-)
2.1: 61(+), 63(-)
2.2: 62(+), 63(-)
2.3: 65(+), 67(-)
2.4: 66(+), 67(-)
3.1: 41(+), 43(-)
3.2: 42(+), 43(-)
3.3: 45(+), 47(-)
3.4: 46(+), 47(-)
4.1: 31(+), 33(-)
4.2: 32(+), 33(-)
4.3: 35(+), 37(-)
4.4: 36(+), 37(-)

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 11/106
5.2.2 CENTRAX CU5000
Function Option 1 Option 2
2 relay outputs 1.1: X1.1 / X1.2 / X1.3
1.2: X2.1 / X2.2 / X2.3 2.1: X3.1 / X3.2 / X3.3 2.2: X4.1 / X4.2 / X4.3
2 analog outputs 1.1: X2.2(+) / X2. 3(-)
1.2: X2.1(+) / X2. 3(-) 2.1: X4.2(+) / X4.3 (-) 2.2: X4.1(+) / X4.3 (-)
4 analog outputs
1.1: X2.2(+) / X2.3(-)
1.2: X2.1(+) / X2.3(-)
1.3: X1.2(+) / X1.3(-)
1.4: X1.1(+) / X1.3(-)
2.1: X4.2(+) / X4.3(-)
2.2: X4.1(+) / X4.3(-)
2.3: X3.2(+) / X3.3(-)
2.4: X3.1(+) / X3.3(-)
4 digital inputs (active)
1.1: X1.1(-) / X1.3(+)
1.2: X1.2(-) / X1.3(+)
1.3: X2.1(-) / X2.3(+)
1.4: X2.2(-) / X2.3(+)
2.1: X3.1(-) / X3.3(+)
2.2: X3.2(-) / X3.3(+)
2.3: X4.1(-) / X4.3(+)
2.4: X4.2(-) / X4.3(+)
4 digital inputs (passive)
1.1: X1.1(+)/ X1.3(-)
1.2: X1.2(+) / X1.3(-)
1.3: X2.1(+)/ X2.3(-)
1.4: X2.2(+)/ X2.3(-)
2.1: X3.1(+)/ X3.3(-)
2.2: X3.2(+)/ X3.3(-)
2.3: X4.1(+)/ X4.3(-)
2.4: X4.2(+)/ X4.3(-)
5.3 Possible cross sections and tightening torques
Inputs L1(2), L2(5), L3(8), N(11), PE(16), I1(1-3), I2(4-6), I3(7-9) , IN(10-12), power supply (13-14)
Single wire
1 x 0,5 ... 6.0mm2or 2 x 0,5 ... 2.5mm2
Multiwire with end splices
1 x 0,5 ... 4.0mm2or 2 x 0,5 ... 2.5mm2
Tightening torque
0.5…0.6Nm resp. 4.42…5.31 lbf in
I/O's, relays, RS485 connector (A, B, C/X)
Single wire
1 x 0.5 ... 2.5mm2or 2 x 0.5 ... 1.0mm2
Multiwire with end splices
1 x 0.5 ... 2.5mm2or 2 x 0.5 ... 1.5mm2
Tightening torque
0.5…0.6Nm resp. 4.42…5.31 lbf in
You may have to remove first the plug-in terminals to get access to the screw terminals of the current
inputs.

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 12/106
5.4 Inputs
All voltage measurement inputs must originate at circuit breakers or fuses rated 5 Amps or
less. This does not apply to the neutral connector. You have to provide a method for
manually removing power from the device, such as a clearly labeled circuit breaker or a
fused disconnect switch.
When using voltage transformers you have to ensure that their secondary connections
never will be short-circuited.
No fuse may be connected upstream of the current measurement inputs!
When using current transformers their secondary connectors must be short-circuited
during installation and before removing the device. Never open the secondary circuit under
load.
The connection of the inputs depends on the configured system (connection type).

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 13/106
Single-phase AC mains
Direct connection
If current INor voltage UNE does not need to be
measured, connection of IN resp. PE can be
omitted.
With current transformer
If current INdoes not need to be measured, the
corresponding transformer can be omitted.
If voltage UNE does not need to be measured,
connection of PE can be omitted.
With current and voltage transformer
If current INor voltage UNE does not need to be
measured, the corresponding transformers can be
omitted.
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
N
5 A
(UL listed)
PE
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
N
5 A
(UL listed)
K
k
L
l
K
k
L
l
PE
L1
N
K
k
L
l
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
5 A
(UL listed)
PE
K
k
L
l
u
U
v
V
u
U
v
V

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 14/106
Three wire system, balanced load, phase shift
current measurement: L1, voltage measurement: L1-L2
Direct connection
With current transformer
With current and voltage transformers
In case of current measurement via L2 or L3 connect the device
according to the following table:
Terminals 1 3 2 5 8
Current meas. via L2 I2(k) I2(l) L2 L3 -
Current meas. via L3 I3(k) I3(l) L3 L1 -
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
5 A
(UL listed)
u
U
v
V

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 15/106
Three wire system, balanced load, phase shift
current measurement: L1, voltage measurement: L2-L3
Direct connection
With current transformer
With current and voltage transformers
In case of current measurement via L2 or L3 connect the device
according to the following table:
Terminals 1 3 2 5 8
Current meas. via L2 I2(k) I2(l) - L3 L1
Current meas. via L3 I3(k) I3(l) - L1 L2
L1 L2 L3
N
I1
31
I2
4
I3
9
7
IN PE
610 12 16 11 2 5 8
L1
L2
L3
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
9
7
IN PE
610 12 16 11 25 8
K
k
L
l
5 A
(UL listed)
u
U
v
V

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 16/106
Three wire system, balanced load, phase shift
current measurement: L1, voltage measurement: L3-L1
Direct connection
With current transformer
With current and voltage transformers
In case of current measurement via L2 or L3 connect the device
according to the following table:
Terminals 1 3 2 5 8
Current meas. via L2 I2(k) I2(l) L2 - L1
Current meas. via L3 I3(k) I3(l) L3 - L2
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
5 A
(UL listed)
v
V
u
U

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 17/106
Three wire system, balanced load, current measurement via L1
Direct connection
With current transformer
With current and voltage transformers
In case of current measurement via L2 or L3 connect the device
according to the following table:
Terminals 1 3 2 5 8
Current meas. via L2 I2(k) I2(l) L2 L3 L1
Current meas. via L3 I3(k) I3(l) L3 L1 L2
By rotating the voltage connections the
measurements U12, U23 and U31 will be
assigned interchanged!
L1 L2L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 25 8
L1
L2
L3
K
k
L
l
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
5 A
(UL listed)
u
U
v
V
u
U
v
V

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 18/106
Four wire system, balanced load, current measurement via L1
Direct connection
If voltage UNE does not need to be measured,
connection of PE can be omitted.
With current transformer
If voltage UNE does not need to be measured,
connection of PE can be omitted.
With current and voltage transformer
If voltage UNE does not need to be measured, the
corresponding transformer can be omitted.
In case of current measurement via L2 or L3 connect the device
according to the following table:
Terminals 1 3 2 11
Current meas. via L2 I2(k) I2(l) L2 N
Current meas. via L3 I3(k) I3(l) L3 N
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
N
5 A
(UL listed)
PE
L1L2 L3
N
I1
31
I2
4
I3
9
7
IN PE
610 12 16 11 258
L1
L2
L3
N
K
k
L
l
5 A
(UL listed)
PE
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
N
K
k
L
l
5 A
(UL listed)
u
U
v
V
u
U
v
V
PE

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 19/106
Three wire system, unbalanced load
Direct connection
With current transformers
With current and 3 single-pole isolated
voltage transformers
L1 L2L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
K
k
L
l
K
k
L
l
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
K
k
L
l
K
k
L
l
L1 L2 L3
N
I1
31
I2
4
I3
97
IN
610 12 16 11 2 5 8
x
u
X
U
X
U
X
U
x
u
x
u
5 A
(UL listed)

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 20/106
Three wire system, unbalanced load, Aron connection
Direct connection
With current transformers
With current and 3 single-pole isolated
voltage transformers
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
K
k
L
l
5 A
(UL listed)
L1 L2 L3
N
I1
31
I2
4
I3
97
IN PE
610 12 16 11 2 5 8
L1
L2
L3
K
k
L
l
K
k
L
l
x
u
X
U
X
U
X
U
x
u
x
u
5 A
(UL listed)