Camille Bauer CENTRAX CU3000, CENTRAX CU5000 Device Handbook

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Camille Bauer Metrawatt AG

http://www.camillebauer.com

Device handbook

CENTRAX CU3000 / CU5000

Operating Instructions CENTRAX CU3000 / CU5000 (2018-11)

Aargauerstrasse 7 CH-5610 Wohlen / Switzerland

Phone: +41 56 6 18 21 11 Telefax: +4 1 56 618 35 35

E-Mail: info@cbmag.com

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 pers onn el are als o 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 webpa ge 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: customer-support@camillebauer.com

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 2/106

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 dat a chang ing .................................................................................................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

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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 app lic a tio n .................................................................................................................... 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 loa d .......................................................................... 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 loa d ........................................................................ 102

B8 Display matrices for 4-wire system, unbalanced lo ad, O pen-Y ............................................................ 103

C Logic functions .......................................................................................................................................... 104

D FCC statement ........................................................................................................................................... 105

INDEX ................................................................................................................................................................ 106

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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 el ec tronic a lly 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 5/106

2. Safety notes

Device may only be disposed in a professiona l 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 com pr ehens ive ins trument 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.

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4. Mechanical mounti ng

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.

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4.2 CE NT RAX CU5000

The device can be clipped onto a top-hat rail according to EN 60715.

Dimensional drawing CU5000: See section 11

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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

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Symbol Meaning

CE conformity mark. The device fulfills the requirements of the applicable EU

Measurement category CAT III for current / voltage inputs, power supply and relay

Device may only be disposed of in a professional manner!

Double insulation, device of protection class 2

directives. Caution! General hazard point. Read the operating instructions.

General symbol: Power supply

General symbol: Input General symbol: Output

CAT III

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

1.1: 56(+), 57(-)

2 analog outputs

1.2: 55(+), 57(-)

1.1: 56(+), 57(-)

1.2: 55(+), 57(-)

4 analog outputs

1.3: 52(+), 53(-)

1.4: 51(+), 53(-)

1.1: 51(-), 53(+)

1.2: 52(-), 53(+)

4 digital inputs (active)

1.3: 55(-), 57(+)

1.4: 56(-), 57(+)

2.1: 61,62,63

2.2: 65,66,67

2.1: 66(+), 67(-)

2.2: 65(+), 67(-)

2.1: 66(+), 67(-)

2.2: 65(+), 67(-)

2.3: 62(+), 63(-)

2.4: 61(+), 63(-)

2.1: 61(-), 63(+)

2.2: 62(-), 63(+)

2.3: 65(-), 67(+)

2.4: 66(-), 67(+)

3.1: 41,42,43

3.2: 45,46,47

3.1: 46(+), 47(-)

3.2: 45(+), 47(-)

3.1: 46(+), 47(-)

3.2: 45(+), 47(-)

3.3: 42(+), 43(-)

3.4: 41(+), 43(-)

3.1: 41(-), 43(+)

3.2: 42(-), 43(+)

3.3: 45(-), 47(+)

3.4: 46(-), 47(+)

4.1: 31,32,33

4.2: 35,36,37

4.1: 36(+), 37(-)

4.2: 35(+), 37(-)

4.1: 36(+), 37(-)

4.2: 35(+), 37(-)

4.3: 32(+), 33(-)

4.4: 31(+), 33(-)

4.1: 31(-), 33(+)

4.2: 32(-), 33(+)

4.3: 35(-), 37(+)

4.4: 36(-), 37(+)

1.1: 51(+), 53(-)

1.2: 52(+), 53(-)

4 digital inputs (passive)

1.3: 55(+), 57(-)

1.4: 56(+), 57(-)

2.1: 61(+), 63(-)

2.2: 62(+), 63(-)

2.3: 65(+), 67(-)

2.4: 66(+), 67(-)

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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(-)

5.2.2 CENTRAX CU5000

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)

I/O's, relays, RS485 connector (A, B, C/X)

Function Option 1 Option 2

2 relay outputs

2 analog outputs

4 analog outputs

4 digital inputs (active)

4 digital inputs (passive)

1.1: X1.1 / X1.2 / X1.3

1.2: X2.1 / X2.2 / X2.3

1.1: X2.2(+) / X2. 3(-)

1.2: X2.1(+) / X2. 3(-)

1.1: X2.2(+) / X2.3(-)

1.2: X2.1(+) / X2.3(-)

1.3: X1.2(+) / X1.3(-)

1.4: X1.1(+) / X1.3(-)

1.1: X1.1(-) / X1.3(+)

1.2: X1.2(-) / X1.3(+)

1.3: X2.1(-) / X2.3(+)

1.4: X2.2(-) / X2.3(+)

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 / X3.2 / X3.3

2.2: X4.1 / X4.2 / X4.3

2.1: X4.2(+) / X4.3 (-)

2.2: X4.1(+) / X4.3 (-)

2.1: X4.2(+) / X4.3(-)

2.2: X4.1(+) / X4.3(-)

2.3: X3.2(+) / X3.3(-)

2.4: X3.1(+) / X3.3(-)

2.1: X3.1(-) / X3.3(+)

2.2: X3.2(-) / X3.3(+)

2.3: X4.1(-) / X4.3(+)

2.4: X4.2(-) / X4.3(+)

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 cro ss secti ons and tightening torques

Single wire 1 x 0,5 ... 6.0mm2 or 2 x 0,5 ... 2.5mm

Multiwire with end splices 1 x 0,5 ... 4.0mm2 or 2 x 0,5 ... 2.5mm

Tightening torque

0.5…0.6Nm resp. 4.42…5.31 lbf in

Single wire 1 x 0.5 ... 2.5mm2 or 2 x 0.5 ... 1.0mm

Multiwire with end splices 1 x 0.5 ... 2.5mm2 or 2 x 0.5 ... 1.5mm

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.

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5.4 Inputs

All voltage measurement inputs must originate at circuit breakers or fuses rated 5 Amps or

The connection of the inputs depends on the configured system (connection type).

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.

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Single-phase AC mains

L1 L2 L3

10 12 16

11 2 5 8

5 A

(UL listed)

L1 L2

10 12 16

11 2 5 8

5 A

(

UL listed)

L1 L2 L3

10 12 16

11 2 5 8

5 A

(UL listed)

Direct connection

If current I

or voltage UNE does not need to be

measured, connection of IN resp. PE can be omitted.

With current transformer

If current IN does not need to be measured, the corresponding transformer can be omitted.

If voltage U connection of PE can be omitted.

does not need to be measured,

With current and voltage transformer

If current IN or voltage UNE does not need to be measured, the corresponding transformers can be omitted.

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Three wire system, balanced load, phase shift

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(

UL listed)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

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 -

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 14/106

Three wire system, balanced load, phase shift

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

1 L2 L

12 16

11 2

5 8

5 A

(

UL listed)

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

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 15/106

Three wire system, balanced load, phase shift

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed

)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

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 Current meas. via L3

I2(k)

I2(l)

I3(k) I3(l) L3 - L2

L2 - L1

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 16/106

Three wire system, balanced load, current measurement via L1

L1 L

10 12 16

11 2 5 8

L1 L2 L3

5 A

(

UL listed)

10 12 16

11 2

5 8

L1 L2 L3

5 A

(UL listed

)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

uUvVu

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 Current meas. via L3

By rotating the voltage connections the measurements U12, U23 and U31 will be assigned interchanged!

I2(k)

I2(l)

I3(k) I3(l) L3 L1 L2

L2 L3 L1

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 17/106

Four wire system, balanced load, current measurement via L1

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L

5 A

(UL listed)

5 A

(

UL listed

)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

uUv

Direct connection

If voltage U connection of PE can be omitted.

does not need to be measured,

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 Current meas. via L3

I2(k)

I2(l)

I3(k) I3(l) L3 N

L2 N

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 18/106

Three wire system, unbalanced load

L1 L

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed

)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

10 12 16

11 2 5 8

5 A

(UL listed)

Direct connection

With current transformers

With current and 3 single-pole isolated voltage transformers

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 19/106

Three wire system, unbalanced load, Aron connection

L1 L2 L3

12 16

11 2 5 8

L1 L2 L3

5 A

(

UL listed

)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

Direct connection

With current transformers

With current and 3 single-pole isolated voltage transformers

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Four wire system, unbalanced load

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

L2 L3

12 16

2 5 8

1 L2 L3

5 A

(

UL listed)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2 L3

5 A

(UL listed)

Direct connection

If current I

or voltage UNE does not need to be

measured, connection of IN resp. PE can be omitted.

With current transformer

If voltage UNE does not need to be measured, connection of PE can be omitted.

If current I corresponding transformer can be omitted.

does not need to be measured, the

With current and voltage transformer

If current IN does not need to be measured, the corresponding transformer can be omitted.

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Four wire system, unbalanced load, Open-Y

1 L2 L3

12 16

11 2 5 8

L1 L

2 L3

5 A

(UL listed)

12 16

11 2

5 8

L1 L

2 L

5 A

(UL listed

)

L1 L2 L3

10 12 16

11 2 5 8

L1 L

5 A

(UL listed)

Direct connection

If current I

or voltage UNE does not need to be

measured, connection of IN resp. PE can be omitted.

With current transformer

If voltage UNE does not need to be measured, connection of PE can be omitted.

If current I corresponding transformer can be omitted.

does not need to be measured, the

With current and voltage transformer

If current IN does not need to be measured, the corresponding transformer can be omitted.

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Split-phase ("two phase system"), unbalanced load

L1 L2 L3

10 12 16

11 2 5 8

L1 L2

5 A

(UL listed)

L1 L2 L3

10 12 16

11 2 5 8

L1 L2

5 A

(UL listed)

L1 L2

12 16

11 2 5

L1 L2

5 A

(UL listed)

Direct connection

With current transformers

With current and voltage transformer

In systems without a primary neutral conductor a voltage transformer with a secondary center tap can also be used.

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5.5 Power supply

A marked and easily accessible curr en t limiting switch has to be arranged in the vicinity of the device for turning off the power supply. Fusing should be 10 Amps or less and must be rated for the available voltage and fault current.

5.6 Relays

When the device is switched off the relay contacts are de-energized, but dangerous voltages may be present.

Relays are available for device versions with corresponding I/O extensions only.

CU3000 CU5000

I/O extension y x

1 5 2 6 3 4 4 3

5.7 Digital inputs

The device provides a standard passive digital input. In addition, depending on the device version, there may be 4-channel passive or active digital input modules available.

Usage of the standard digital input

► Status input ► Meter tariff switching

Usage of the inputs of the optional input modules

► Counting input for pulses of meters for any kind of energy (pulse width 70…250ms) ► Operating feedback of loads for operating time counters ► Trigger and release signal for monitoring functions

Passive inputs (external power sup ply with 12 / 24 VDC required)

The power supply shall not exceed 30V DC!

CU3000 CU5000

Technical data Input current < 7,0 mA Logical ZERO - 3 up to + 5 V Logical ONE 8 up to 30 V

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Active inputs (no external power supply required)

Technical data (acc. EN62053-31, class B) Open circuit voltage ≤ 15 V Short circuit current < 15 mA Current at R

=800Ω ≥ 2 mA

CU3000 CU5000

Example with meter pulse and status inputs

5.8 Digital outputs

The device has two standard digital outputs for which an external 12 / 24 VDC power supply is required.

The power supply shall not exceed 30V DC!

Usage as digital output

► Alarm output ► State reporting ► Pulse output to an external counter (acc. EN62053-31) ► Remote controlled output

CU3000 CU5000

Recommended if input impedance of counter > 100 kΩ

Driving a counter mechanism The width of the energy pulses can be selected within a range of 30 up to 250ms, but have to be adapted

to the external counter mechanism.

Electro mechanical meters typically need a pulse width of 50...100ms. Electronic meters are partly capable to detect pulses in the kHz range. There are two types: NPN (active

negative edge) and PNP (active positive edge). For this device a PNP is required. The pulse width has to be ≥ 30ms (acc. EN62053-31). The delay between two pulses has to be at least the puls e widt h. T he smaller the pulse width, the higher the sensitivity to disturbances.

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Driving a relay Rated current 50 mA (60 mA max.)

Switching frequency (S0) ≤ 20 Hz Leakage current 0,01 mA Voltage drop < 3 V Load capacity 400 Ω … 1 MΩ

5.9 Analog outputs

Analog outputs are available for devices with corresponding I/O extensions only. See nameplate. Analog

outputs may be remote controlled.

CU3000 CU5000

Connection to an analog input card of a PLC or a control system

The device is an isolated measurement device. The individual outputs are galvanically connected, but the modules are isolated from each other. To reduce the influence of disturbances shielded a twisted-pair cables should be used. The shield should be connected to earth on both opposite ends. If there are potential differences between the ends of the cable the shield should be earthed on one side only to prevent from equalizing currents.

Under all circumstances consider as well appropriate remarks in the instruction manual of the system to connect.

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5.10 Fault current detection

Use only transformers intended for this application catalog divergent specifications may damage the measurement in

CU3000

CU5000

The current transformers including the conductor isolation must guarantee in total a reinforced or double insulation between the mains circuit connected on the primary and the measuring inputs of the device

Only one measurement range may be connected per measuring channel!

The COM connectors of both measurement channels are internally connected.

For 2mA inputs a connection monitoring (breakage) is signaled for the respective measurement channels if either the current transfomer is disconnected or the connection to the transformer is interrupted.

Each fault current module provides two channels for monitoring differential or fault currents in earthed AC current systems. In any case measurement has to be performed via suitable current transformers, a direct measurement is not possible. The module is not suited for monitoring operating currents of normally live conductors (L1, L2, L3, N).

Measurement ranges

Each channel provides two measurement ranges: a) Measurement range 1A

• Application: Direct measurement of a fault or earth wire current

• Meas. transformer: Current transformer 1/1 bis 1000/1A; 0.2 up to 1.5VA;

Instrument security factor FS5

b) Measurement range 2mA

• Application: Residual current monitoring (RCM)

• Meas. transformer: Residual current transformer 500/1 up to 1000/1A

Rated burden 100 Ω / 0.025 VA up to 200 Ω / 0.06 VA

, according to our current transformer

, or transformers that fulfill the above specification. Using transformers with

puts.

Connection

Erweiterung y x

1 5 2 6 3 4 4 3

side

implemented. An alarm state is

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Example: Fault current monitoring in a TNS system

Hints

(1) If the current transfomers for the fault current detection needs to be grounded on the secondary side

this has to be done via the COM connector.

(2) Note that all conductors have to cross the residual current transformer

in the same direction.

(3) A possible fault current flows through the protective

earth conductor (PE). It can only be detected if the PE conductor is not routed through the residual current transformer. If this cannot be avoided, e.g. due to using a multi-wire cable with all conductors, the PE conductor must be returned through the transformer.

(4) The cable or individual conductors should be routed through the

transformer as centered as possible in order to minimize measurement errors.

(5) Neither the current transformers nor the measurement leads should be mounted or installed close to

strong magnetic fields. Measurement lines should also not be laid in parallel to power lines.

(6) For measurement range 1A only: The rated output of the transformer must be chosen that it is

reached when the rated secondary current (1A) flows. Consider that the burden of the transformer is not only made up by the burden of the measurement input, but also by the resistance of the measurement lines and the self-consumption of the transformer (copper losses).

 A rated output selected too low leads to saturation losses in the transformer. The secondary

rated current can no longer be reached as the transformer reaches its limits before.

 A rated output selected too high or an exceeding instrument security factor (>FS5) may cause

damage to the measuring inputs in case of overload.

(7) For the connection of the transformer to the fault detection module use …

 Conductor cross sections of 1.0 up to 2.5mm  Pairwise twisted connections in case of short cable lengths  Shielded cables (shield grounded on one side only) in disturbed environment or in case of long

cable lengths

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5.11 Modbus interface RS485

Via the optional Modbus interface measurement data may be provided for a superior system. However, the Modbus interface cannot be used for device parameterization.

1) One ground connection only. This is possibly made within the master (PC).

Rt: Termination resistors: 120 Ω each

for long cables (> approx. 10 m)

Rs: Bus supply resistors,

390 Ω each

The signal wires (A, B) have to be t wist ed. G ND ( C/X) can be connected via a wire or via th e c abl e sc r een. In disturbed environments shielded cables must be used. Supply resistors (Rs) have to be present in bus master (PC) interface. Stubs should be avoided when connecting the devices. A pure line network is ideal.

You may connect up to 32 Modbus devices to the bus. A proper operation requires that all devices connected to the bus have equal communication settings (baud rate, transmission format) and unique Modbus addresses.

The bus system is operated half duplex and may be extended to a maximum length of 1200 m without repeater.

5.12 Uninterruptible power supply (UPS)

The battery pack for the uninterruptible power supply is supplied separately. Please note that compared to the storage temperature range of the base unit the storage temperature range of the battery pack is restricted.

Ensure that devices with uninterruptible power supply are used in an environment in accordance with the

specification

recharged.

. Outside this operating temperature range, it is not ensured that the battery pack is

Due to aging the capacity of the battery decreases. To ensure a successful operation of the device during power interuptions the batt ery needs to be replaced every 3 up to 5 years.

Potential for Fire or Burning. Do do not disassemble, crush, heat or burn the removed battery pack.

Replace battery pack with a battery pack of the same type only. Use of another battery may present a risk of fire or explosion.

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5.13 GPS time synchronization

Only use the receiver Garmin GPS 16x-LVS (article

The optional GPS connection module serves for connecting a GPS receiver as a very accurate time synchronization source for the measurement device. The GPS receiver, available as an accessory, is used as outdoor antenna to process data from multiple GPS satellites simultaneously.

GPS receiver

no. 181‘131), offered as an accessory. This device is preconfigured by us and provides the required time information (sentences) without further configuration effort .

• Protection: IPx7 (waterproof)

• Operating temperature: -30…80°C

• Storage temperature: -40…80°C

• 1Hz pulse accuracy: 1μs

• Connector: RJ45

Choosing a mounting location

For a correct operation the GPS receiver requires data from at least 3 satellites at the same time. Therefore position the receiver so that the clearest possible view of the sky and horizon in all direction is obtained. This can be on the roof of a building, at best without reception being restricted by other buildings or obstacles. Avoid mounting the receiver next to large areas of conductible material, as this may cause poor signal reception. It should be also not closer than 1 meter away from any other antenna.

If lightning protection is required, this must be provided by the user himself.

Mounting the GPS receiver

• The GPS receiver Garmi n G PS 16x -LVS can be flush mounted by means of 3 M4 screws.

• 120° distribution over a circle of ø71.6mm

• Thread length max. 8mm. Using longer

screws may damage the GPS receiver.

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Connecting the GPS receiver

When connecting a GPS receiver for the first time or when it has been out of operation for a long time, it may take up to 1 hour for finding enough satellites f GPS receiver operation and thus for a reliable time synchronization.

Never connect the RJ45 connector of the connecting cable directly to a network device such as a router or switch. These devices could be damaged.

The GPS receiver is plugged directly into the GPS connection module. The connection cable has a length of 5 m. It may be extended using an RJ45 coupling and an Ethernet cable. The connection cable should not be laid in parallel to live conductors. Twisting or sharp kinking of the cable should be avoided.

Commissioning

• In the settings menu change time synchronization to „NTP server / GPS“

• Check the time synchronization status

• The time synchronization can be restarted by switching the time synchronization off and on again.

• Time synchronization via GPS and NTP server may work in parallel. If both synchronization sources

are available, the system uses the more accurate time source, which is normally GPS.

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6. Commissioning

Measurement input

Before commissioning you have to check if the connection data of the device match the data of the plant (see nameplates).

If so, you can start to put the device into operation by switching on the power supply and the measurement inputs.

Measurement input

Input voltage

Input current

System frequency

1 Works no. 2 Test and conformity marks 3 Assignment voltage inputs 4 Assignment current inputs 5 Assignment power supply 6 Load capacity relay

outputs

…………………………………………………………………………………………………………………………

Input voltage

Input current

System frequency

1 Works no. 2 Test and conformity marks 3 Assignment voltage inputs 4 Assignment current inputs 5 Assignment power supply

6 Load capacity relay

outputs

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6.1 Parametrization of the device functionality

Missing phase or magnitude too

A full parameterization of all functions of the device is possible directly at the device (for devices with display only) or via web browser.

See: Configuration (7.5)

6.2 Operating LED (CU5000 only)

The operating LED shows the present device state.

Procedure LED display Booting of device

Firmware update

Factory reset or reset of communication settings

• Flashes green (1 Hz)

• If successful: Change to static green display

• Change to update mode: Static red

• During update: Flashes red (1 Hz)

• If successful or cancelled: Booting of device

• During reset: Flashes red (1 Hz)

• Then: Booting of device

6.3 Installation ch ec k

The correct connection of the current and voltage inputs can be checked in two ways.

a) Sense of rotation check: Using the sequence of the current and voltage phasors the sense of

rotation is determined and compared to the configured one. The phase rotation indicator is arranged in the menu “Phasor diagram”.

Test requirement: Magnitude of all connected voltages at least 5% of nominal, magnitude of all connected currents at least 0.2% of nominal.

Possible results

Correct sense of rotation

Wrong sense of rotation

small

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b) Phasor verification: The phasor diagram shows a technical visualization of the current and voltage

The diagram is always built basing on the voltage of the reference channel (direction 3 o’clock)

phasors, using a counter-clockwise rotation, independent of the real sense of rotation.

Correct installation (expectation)

• Voltage sequence in clock-wise order

L1  L2  L3 (0°  -120°  120°)

• Current sequence in clock-wise order

L1  L2  L3

• Similar angle between voltage and current phasors in

all phases (approx. -20°)

What’s wrong?

• Voltage sequence: L1  L2  L3

• Current sequence: L1 L3  L2; Current L2 is out of

the expected sequence

• Angle U-I: Angle between UL2 and IL2 is approx. 180° wrong

Required correction Exchanging the connections of current I2

What’s wrong?

• Voltage sequence: L1 L3  L2; L3 and L2 seem to be interchanged

• Current sequence: L1  L2  L3

• Angle U-I: Angle between U

wrong

Required correction Exchanging the connections of the voltages L2 and L3

and IL2 is approx. 180°

What’s wrong?

• Voltage sequence: L1 L3  L2; L3 and L2 seems to be exchanged

• Current sequence: L1 L3  L2; Current L2 is out of the expected sequence

• Angle U-I: Angles between UL2 / IL2 and UL3 / IL3 do not correspond to the expectations

Required correction Exchanging the connections of the voltages L2 and L3 and reversing the polarity of the current input I

What’s wrong?

• Voltage sequence: L1  L2  L3

• Current sequence: L2 L3  L1

• Angle U-I: The U-I angles do not correspond to the

expectation, but are similar

Required correction Cyclical exchange of the voltage connections: L1L3, L2L1, L3L2. As an alternative the sequence of all current may be changed as well (more effort required).

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6.4 Ethernet installation

6.4.1 Settings

Before devices can be connected to an existing Ethernet network, you have to ensure that they will not disturb the normal network service. The rule is:

The device can be equipped with multiple Ethernet interfaces whose network settings can be configured independently.

Interface Application Default IP Settings via menu

Standard Configuration / Modbus TCP 192.168.1.101 Settings | Communication | Ethernet IEC 61850 IEC61850 communication 192.168.1.102 Settings | IEC61850 | Ethernet

The following settings have to be arranged with the network administrator:

- IP address: This one must be unique, i.e. may be assigned in the network only once.

- Subnet mask: Defines how many devices are directly addressable in the network. This setting is equal for all the devices. Examples

None of the devices to connect is allowed to have the same IP address than another device already installed

- Gateway address: Is used to resolve addresses during communication between different networks. It should contain a valid address within the directly addressable network.

- DNS-S erv e r x: Is used to resolve a domain name into an address, if e.g. a name (pool.ntp.org) is used for the NTP server. Further informations

- Hostname: Individual designation for each device. Via the hostname the device can be uniquely identified in the network. Therefore for each device a unique name should be assigned.

- NTP-Server x: NTP servers are used as base for time synchronization

- Modbus/TCP Port: Selection of the TCP port to be used for Modbus/TCP communication. Standard setting is 502. See also TCP ports

Network settings of Standard interface

Network settings of IEC61850 interface

For a direct communication between device and PC both devices need to be in the same network when the subnet mask is applied:

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Example 1

11000000 10101000 00000001 01100101

255.255.255.224

11111111 11111111 11111111 11100000

xxxxx

192.168. 1. 96

11000000 10101000 00000001 01100000

11000000 10101000 00000001 01111111

Example 2

192.168. 57. 64

11000000 10101000 00111001 01000000

255.255.252. 0

11111111 11111111 11111100 00000000

xx xxxxxxxx

192.168. 56. 0

11000000 10101000 00111000 00000000

192.168. 59.255

11000000 10101000 00111011 11111111

decimal binary IP address Subnet mask variable range First address Last address

► The device 192.168.1.101 can access directly the devices 192.168.1.96 … 192.168.1.127

IP address Subnet mask variable range First address Last address

► The device 192.168.57.64 can access directly the devices 192.168.56.0 ... 192.168.59.255

DHCP

If a DHCP server is available, alternatively the mode „DHCP“ or „DHCP, addresses only“ can be selected for the Standard inter f ace. The device then gets all necessary information from the DHCP server. The difference between the two modes is that for “DHCP” also the DNS server address is obtained.

192.168. 1.101

192.168. 1.127

decimal binary

The settings obtained from the DHCP server can be retrieved locally via the service menu.

Depending on the settings of the DHCP server the provided IP address can change on each reboot of the device. Thus it’s recommended to use the DHCP mode during commissioning only.

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Time synchronization via NTP protocol

CU3000

CU5000

For the time synchronization of devices via Ethernet NTP (Network Time Protocol) is the standard. Corresponding time servers are used in computer networks, but are also available for free via Internet. Using NTP it's possible to hold all devices on a common time base.

Two different NTP servers may be defined. If the first server is not available the second server is used for trying to synchronize the time.

If a public NTP server is used, e.g. “pool.ntp.org”, a name resolution is required. This normally happens via a DNS server. So, the IP address of the DNS server must be set in the communication settings of the Ethernet interface to make a communication with the NTP server, and thus time synchronization, possible. Your network administrator can provide you the necessary information.

The time synchronization of the Standard interface can be performed via a GPS receiver

as well.

TCP ports

The TCP communication is done via so-called ports. The number of the used port allows determining the type of communication. As a standard Modbus/TCP communication is performed via TCP port 502, NTP uses port 123. However, the port for the Modbus/TCP telegrams may be modified. You may provide a unique port to each of the devices, e.g. 503, 504, 505 etc., for an easier analysis of the telegram traffic. Independent of these setting a communication via port 502 is always supported. The device allows at least 5 connections to different clients at the same time.

Firewall

Due to security reasons nowadays each network is protected by means of a firewall. When configuring the firewall you have to decide which communication is desired and which have to be blocked. The TCP port 502 for the Modbus/TCP communication normally is considered to be unsafe and is often disabled. This may lead to a situation where no communication between networks (e.g. via Internet) is possible.

6.4.2 Connection of the standard interface

The RJ45 connector serves for direct connecting an Ethernet cable.

 Interface: RJ45 socket, Ethernet 100BaseTX  Mode: 10/100 MBit/s, full / half duplex, Auto-negotiation  Protocols: http, Modbus/TCP, NTP

Functionality of the LED's

• LED left: Switched on as soon as a network connection exists (link)

• LED right: Switched-on during communication with the device (activity)

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6.4.3 Connection of the IEC61850 interface

CU3000

CU5000

• LED green: On if a network connection (link) exists, flashes during communication

CU3000

CU5000

The RJ45 sockets X1 and X2 serve for direct connecting Ethernet cables. Both ports are equivalent and internally connected via a switch.

 Interface: RJ45 sockets, Ethernet 100BaseTX  Mode: 10/100 MBit/s, full / half duplex, Auto-negotiation  Protocols: IEC61850, NTP

Functionality of the LED's

6.4.4 MAC addresses

For uniquely identifying Ethernet connections in a network, to each connection a unique MAC address is assigned. Compared to the IP address, which may be modified by the user at any time, the MAC address is statically.

Standard Ethernet interface

IEC61850 Ethernet-Schnittstelle

6.4.5 Communication tes ts

Via the service menu on the device website you may check if the selected network structure is valid. The device must be able to reach the DNS server via gateway. The DNS server then allows resolving the URL of the NTP server to an IP address. The Standard Ethernet interface serves as interface for the communication tests.

• Ping: Connection test to any network device, (initial: g at e wa y address )

• DNS: Test, if the name resolution via DNS works (initial: URL of NTP server)

• NTP: Test, if the selected NTP-Server is in fact a time server (stratum x)

NTP server test

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6.4.6 Resetting the communication settings of the CU5000

If the communication settings of the Standard interface are no longer known, they can be reset to the default settings by pressing the sunk-in reset button (located below the operating LED) for at least 3s. During the reset the operating LED flashes red. After the reset the device is rebooted.

6.5 Protection against device data changing

Configuration or measurement data stored in the device may be modified via either service or settings menu. To protect these data a security system may be activated (default: not activated). If the security system is active the user hat to enter a password before executing protected functions. Subsequent to a successful password input the access remains open until the user leaves the settings / service menu or an input timeout occurs.

For activating the security system a password input is required. The factory default is: “1234”.

The password can be modified by the user. Permitted characters are ‘a‘…‘z‘, ‘A‘…‘Z‘ and ‘0‘…‘9‘, length 4…12 characters.

ATTENTION: A reset to factory default will reset also the password. But for a factory reset the present password needs to be entered. If this password is no longer known the device must be sent back to the factory!

Representation

Security system active

Security system deactivated / inactive

Device display

Webpage

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7. Operating the devic e

7.1 Operating elements

CU3000 CU5000

The operation of devices with display is performed by means of 6 keys:

 4 keys for navigation ( , , , ) and for the selection of values  OK for selection or confirmation  ESC for menu display, terminate or cancel

The function of the operating keys changes in some measurement displays, during parameterization and in service functions. For the CU3000 the valid functionality of the keys is then shown in a help bar.

7.2 Selecting the information to display

CU3000 CU5000

For devices with display, information selection is performed via menu. Menu items may contain further sub-menus.

Displaying the menu

Press ESC. Each time the key is pressed a change to a higher menu level is performed, if present.

Displaying information

The menu item chosen using , can be selected using OK. Repeat the procedure in possible submenus until the required information is displayed.

Return to measurement display

After 2 min. without interaction the menu is automatically closed and the last active measurement display is shown.

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7.3 Measurement displays and used symbols

For displaying measurement information the device uses both numerical and numerical-graphical measurement displays.

Examples Measurement information

2 measured quantities

4 measured quantities

2x4 measured quantities

2x4 measured quantities with Min/Max

Graphical measurement display

Further examples

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Incoming / outgoing / inductive / capacitive

The device provides information for all four quadrants.

Σ HT

Σ LT

Examples

Quadrants are normally identified using the roman numbers I, II, III and IV, as shown in the adjacent graphic. Depending on whether the system is viewed from the producer or consumer side, the interpretation of the quadrants is changing: The energy built from the active power in the quadrants I+IV can either been seen as delivered or consumed active energy.

By avoiding terms like incoming / outgoing energy and inductive or capacitive load when displaying data, an independent interpretation of the 4-quadrant information becomes possible. Instead the quadrant numbers I, II, III or IV, a combination of them or an appropriate graphical representation is used. You can select your own point of view by selecting the reference arrow system (load or generator) in the settings of the measurement.

Used symbols

For defining a measurement uniquely, a short description (e.g. U sufficient. Some measurements need further information, which is given by one of the following symbols or a combination of these symbols:

I,II,III,IV

Mean-value

Mean-value trend

Bimetal function (current)

Energy quadrants I+IV

Energy quadrants II+III

Energy quadrants I+II

Energy quadrants III+IV

Quadrants

) and a unit (e.g. V) are often not

TRMS True root-mean-square val ue

RMS

(H1) Fundamental component only

Meter (high tariff)

Meter (low tariff)

Maximum value

Minimum value

Root-mean square value (e.g. fundamental or harmonic content only)

Average (of RMS values)

CU3000: Meters with tariff and quadrant information

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CU5000: User mean values, last value

CU5000: User mean values, trend

7.4 Resetting measurement data

• Minimum and maximum values may be reset during operation. The reset may be performed in groups using the service menu.

Group Values to be reset

1 Min/max values of voltages, currents and frequency 2 Min/max values of Power quantities (P,Q,Q(H1),D,S); min. load factors 3 Min/max values of power mean-values, bimetal slave pointers and free selectable mean-values 4 Maximum values of harmonic analysis: THD U/I, TDD I, individual harmonics U/I 5 All imbalance maximum values of voltage and current

• Meter contents may be individually set or reset during operation using the service menu

• Recorded logger data can be individually reset via the service menu. This makes sense whenever the

configuration of the quantities to record has been changed.

7.5 Configuration

7.5.1 Configuration at the device

A full parameterization of the device can be performed via the menu “Settings”. With the exception of the “Country and clock” menu, all modifications will not take effect before the user accepts the query “Store configuration changes” when leaving the settings menu.

• Country and clock: display language, date format, time zone, clock synchronization, time/date

• Display: Refresh rate, brightness, screen saver

• Communication: Settings of the communication interfaces Ethernet and Modbus/RTU

• Measurement: System type, sense of rotation, nominal valu es of U / I / f, sampling, reference arrow

system etc.

Hints

 U / I transformer: The primary to secondary ratio is used only for converting the measured secondary to

primary values, so e.g. 100 / 5 is equivalent to 20 / 1. The values do not have any influence on the display format of the measurements.

 Nominal voltage: Is used as the 100% reference for monitoring the voltage events of the disturbance logger. It

corresponds to the declared input voltage U

 Nominal current: Used for scaling the harmonic content TDD  Maximum primary values U/I: These values are used for fixing the display format of the measurements. This

way you can optimize the resolution of the displayed values, because there is no dependency to installed transformers.

 Synchronous sampling: yes=sampling is adjusted to the measured system frequency to have a constant

number of samplings per cycle; no=constant sampling based on the selected system frequency

 Reference channel: The measurement of the system frequency is done via the selected voltage or current

input

in accordance with IEC 61000-4-30

din

of the currents

• Disturbance logger: Definition of parameters for monitoring the PQ events voltage dip, voltage

interruption and voltage swell

• Mean-values | standard quantities: Interval time and synchronization source for the predefined

power mean values

• Mean-values | user defined quantities: Selection of up to 12 quantities for determining their mean-

values and selection of their common interval and synchronization source

• Bimet al cu rren t : Selection of the response time for determining bimetal currents

• Meters | Standard meters: Tariff switching ON/OFF, meter resolution

• Meters | User defined meters: Base quantities (Px,Qx,Q(H1)x,Sx,Ix), Tariff switching ON/OFF,

meter resolution

• Meters | Meter logger: Selection of the reading interval

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• Digital inputs: Debounce time (minimum pulse width) and polarity of the digital input

• Fault current: Configuration of the fault current channels, especially alarm and prewarning limits,

transformer ratios as well as response and dropout delay

• Security system: Definition of password and password protection active/inactive

• Demo mode: Activation of a presentation mode; measurement data will be simulated. Demo mode

is automatically stopped when rebooting the device.

• Device tag: Input of a free text for describing the device

7.5.2 Configuration via web browser

It’s recommended to use either Google-Chrome or Firefox as browser.

Internet Explorer works with limitations only (partly missing texts, firmware update not possible)

For configuration via web browser use the device homepage via http://<ip_addr>. The default IP address of the device is 192.168.1.101.

This request works only if device and PC are in the same network when applying the subnet mask (examples

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Via WEB-GUI all device settings can be performed as via the local GUI. Possibly modifications needs to be saved in the device, before all parameters have been set. In such a case the following message appears:

If this request is not confirmed unsaved modifications of the present device configuration ma y get lost.

Loading / saving configuration files

The user can save the present device configuration on a storage media and reload it from there. The storage or load procedure varies depending on the used browser.

Loading a configuration file from a storage media The configuration data of the selected file will be directly loaded into the device. The

values in the WEB-GUI will be updated accordingly . Normally devices differ in the settings of network resp. Modbus parameters and device name. Thus when loa ding the file you can choose, whether the appropriate settings of the device should be retained or overwritten by the values in the file to be uploaded.

Storing the current parameter settings of the WEB-GUI into the device

Saving the device configuration to a storage media

Attention: Modifications in the WEB-GUI, which haven’t been stored in the device, will not be written to the storage media.

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7.6 Monitoring fault-currents

Each (optional) fault current module provides two channels for monitoring residual or fault current. For each of the channels an alarm and a prewarning limit can be defined, which can be used as follows:

… Activating a summary alarm … Entry into the alarm list, if the state of the alarm limits monitoring changes or when a breakage

occurs (2mA input only)

… Entry into the event list, if the state of the prewarning limits monitoring changes

And via PLC application:

… as source for digital outputs … the value of the individual fault currents can also be output via the analog outputs

The present values of the monitored fault currents are visible via the menu of the instantaneous values:

when the alarm limit is violated or a breakage occurs (2mA input only)

Meaning of the used symbols

Current value normal Prewarning limit violated Alarm limit violated Alarm: Configured limit for ON Alarm: Configured limit for OFF Prewarning: Configured limit for ON Prewarning: Configured limit for OFF

Breakage of measurement line detected

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Summary alarm

The summary alarm combines the states of all channels of the optional failure-current monitoring. If either an alarm state or a breakage of the measurement line (2mA inputs only) is detected the summ ary alarm is directly activated.

Alarm via local GUI Alarm via WEB-GUI

Alarm display

The symbol arranged in the status bar signalizes active alarms. Acknowledgment: By acknowledging the summary alarm, the user confirms that he has recognized that

an alarm state occurred. The acknowledgment is done automatically as soon as the user selects the alarm list to be displayed either locally or via web browser or if the alarm state no longer exists. By acknowledging only the flashing of the alarm symbol stops, the symbol itself remains statically displayed until none of the fault current channels is in the alarm state.

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7.7 Data recording

The optional data logger provides long-term recordings of measurement progressions and events. The

recording is performed in endless mode (oldest data will be deleted, as soon as the associated memory is full). Depending on the version ordered, the following data groups are available:

Group Data type Request

• Mean value logger

• Meter logger

• Event and alarm list

• Operator list

• Disturbance

recorder

Periodical data

Events

Disturbance recorder

• Mean-values versus time

• Periodical meter readings

In Form of a logbook with time information:

• Event list: Every state transition of monitoring functions or limit values, classified as event

• Alarm list: Every state transition of monitori ng functions or limit values, classified as alarm

• Operator list: The occurrence of system events, such as configuration changes, power failures or reset operations and much more

Events will be registered in the disturbance recorder list. By selecting the entries:

• the course of the RMS values of all U/I

• the curve shape of all U/I

during the disturbance will be recorded

Energy

Events

7.7.1 Periodical data Configuration of the periodical data recording

The recording of all configured mean-values and meters is started automatically. The recording of the mean-values is done every when the appr opri ate av era gin g interval expires. For meters the reading interval can be configured, individually for standard and user-defined meters.

Displaying the chronology of the mean values The chronology of the mean values is available via the menu Energy and is divided in two groups:

• Pre-defined power mean values

• User-defined mean values

Selection of the mean values group

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The selection of the mean-value quantity to display can be performed via choosing the corresponding register. Three different kind of displays are supported:

• Daily profile: Hourly mean-values will be shown, independently of the real averaging time

• Weekly profile

• Table: Listing of all acquired mean-v alu es in

the sequence of the real averaging interval

The graphical representation allows to compare directly the values of the previous day resp. week.

By selecting the bars you may read the associated values:

• Mean-value

• Min. RMS value within the interval

Weekly display

• Max. RMS value within the interval

Weekly display: Reading

Mean values in table format

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Displaying the chronology of meter contents The chronology of meters is available via the menu Energy and is divided in two groups:

• Pre-defined meters

• User-defined meters

From the difference of two successive meter readings the energy consumption for the dedicated time range can be determined.

Selection of the meter logger group

Meter content readings in table form

Displaying data locally

The selection works in principle in the same way as with the WEB-GUI. There are the following differences:

• The individual measured quantities are arranged in a display matrix and can be selected via navigation.

• The number of displayable meter readings is limited to 25

• The time range of the mean values is limited to the present day resp. the present week. There is no

possibility for navigation.

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Data export as CSV file

Via the time range of the data to export can be selected. A CSV (Comma separated value) file will be generated. This can be imported als a text file to Excel, with comma as a separator.

The same file contains data for all quantities of the respective group.

7.7.2 Events Displaying of event entries

Event lists are a kind of loogbook. The occurrence of monitored events is recorded in the appropriate list with the time of its occurrence.

Example of an operator list

Displaying data locally

The selection works in principle in the same way as with the WEB-GUI. There is the following difference:

• The number of displayable events is limited to 25

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7.7.3 Disturbance recorder

Configuration of the events to record

The device monitors the events voltage dip, swell and interruption. The user can define the threshold levels for these events in the menu Settings | Disturbance Logger.

Display of disturbance recordings (locally)

Recorded disturbances are available in the form of a logbook. Each detected disturbance is entered into the disturbance recorder list with the time of its occurrence. By selecting a list entry the graphical display of the measured values during this event is entered. The following presentations are available:

• Half cycle RMS curves of all voltages, all currents, all voltages and currents

• Curve shapes of all voltages, all currents, all voltages and currents

Display matrix on the local display

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Restriction of the quantities to display on the local display

Voltage display

Current display

Mixed display

The user can adapt the displayed information to its needs. Once the graphic is displayed, the setting window for the selection of the quantities to display is entered by pressing <OK>.

Display of disturbance recordings (WEB-GUI)

As with the local GUI, recorded disturbances are available in the form of a logbook. By selecting a list entry the graphical display of the measured values during this event is entered.

List of disturbance recordings

Graphical display of a disturbance recording

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7.7.4 Micro SD card (CU3000 only)

Data stored on the SD card can be accessed only as long as the card is

Devices with data logger are supplied with a micro SD-Card, which provides long recording times.

Activity

The red LED located next to the SD card signalizes the logger activity. When data is written to the SD card the LED becomes shortly dark.

Exchanging the card

For exchanging the SD card the removal key needs to be pressed. Once the LED becomes green the card is logged off and can be removed. To remove the card, press it slightly into the device to release the locking mechanism: The card is pushed out of the device.

If the SD card is not removed within 20s the exchanging procedure is cancelled and the card will be mounted to the system again.

Data cannot be temporarily stored in the device. If there is no SD card in the device no recordings can be done.

in the device. Stored data may be read and analyzed via the webpage of the device or in reduced manner via display only. The content of the SD card cannot be read using a Windows PC.

Thus before removing the SD card from the device, all data need to be read via Ethernet interface.

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7.8 Timeouts

Devices with display are designed for displaying measurements. So, any other procedure will be

terminated after a certain time without user interaction and the last active measurement image will be shown again.

Menu timeout

A menu timeout takes effect after 2 min. without changing the present menu selection. It doesn’t matter if

the currently displayed menu is the main menu or a sub-menu: The menu is closed and the last active measurement image is displayed again.

Configuration timeout

After 5 min. without interaction in a parameter selection or during entering a value in the settings menu, the active configuration step is closed and the associated parameter remains unchanged. The next step depends on what you have done before:

• If the user did not change configuration parameters before the aborted step, the main menu will be displayed and the device starts to monitor a possible menu timeout.

• If the user changed configuration parameters before the aborted step, the query “Store configuration changes?” is shown. If the user does not answer this query within 2 min. this dialogue is closed: The changed configuration will be stored and activated and then the last active measurement image is displayed again.

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8. CODESYS Quick Start



CODESYS is a hardware independent developing environment which can be used to create control applications on a target system (here CENTRAX CUx000). For creating the application any of the programming languages according IEC 61131-3 can be used.

A detailed description of CODESYS is available via the help menu inside the developing environment. The following information is a brief introduction to the operation of CODESYS.

8.1 CODESYS development environment

In order to be able to use the control functionality of the devices of the CENTRAX series the CO DE S YS development environment is required. This can be downloaded free of charge from our homepage

http://www.camillebauer.com/cu3000-en or http://www.camillebauer.com/cu5000-en

in a version tested with the devices. All necessary licenses are stored in the hardware and are therefore included in the scope of supply.

 Install the CODESYS development environment on your PC

8.2 CENTRAX device description

For CENTRAX devices to be used in the development environment as a hardware resource resp. target platform, it is necessary to install a corresponding device description file. This file describes the possibilities of the device. Once it is installed, CENTRAX devices are available in the device list and their functionality can be used.

The device decription can directly be downloaded from the device using its webpage. To do so, enter the IP address of the device in your browser, e.g. 192.168.62.214 as shown below. The device description can be downloaded via the service menu using CODESYS

package/. Alternatively the file can also be downloaded from our website

Download. The file is stored in the folder

http://www.camillebauer.com/cu3000-en or http://www.camillebauer.com/cu5000-en.

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The device descriptio n can then be insta ll ed in two wa ys .

a) File | New Proj ec t 

Standard project

 Double click on the device description file CENTRAX_CUx000_<version>.package

The prerequisite is the installed CODESYS development environment and sufficient user rights.

 Via Tools | Package Manager in the CODESYS development environment

You may need to run the CODESYS development environment with administrative privileges.

8.3 Create a project

b) Next to Device se lect the perform ance class ( Basic, Advanced, Prof essional) of the target device, e.g.

CU3000/CU5000 Basic, at PLC_PRG select the programming language to be used for creating the application.

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8.4 CU3000/CU5000 Device tree

2 3 4

The new created project is now visible on the left side of the main window. The device tree contains the application , the measurement image , the input and outputs and an additional Modbus image .

8.5 Selection of the I/O extension modules

The I/O options can vary depending on the device version ordered. So, before the corresponding I/O channels can be used by the control application they have to be selected.

The options need to be configured in the device tree of the project via I/O  option x. For a CU3000 all I/O options may be assigned, for a CU5000 option 1 and 2 only. Right click on the field <Empty> and select Plug Device to open the appropriate configuration window.

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Select the correct module and confirm via „Plug Device“.

Repeat this procedure until all used options ha ve bee n plugge d in. Leave all unused modules or not control relevant modules such as UPS empty.

8.6 Using the Modbus master functionality

For the performance classes ADVANCED and PROFESSIO NAL Modbus interfaces can also be used to read measurement data from other devices. For the Ethernet interface this master functionality can be used in parallel to the existing Modbus/TCP server functionality.

For the Modbus/RTU interface via RS485 the slave mode is deactivated as soon as the master functionality is used.

Building-up a master/server or master/slave structure is done in four steps:

a) Add a field-bus (Ethernet or Modbus RS-485) b) Add the corresponding Master functionality c) Parametrization of the Master d) Add devices to the Master. You may choose from different measurement devices of Camille Bauer

and Gossen Metrawatt with a predefined Modbus image respectively direct selectable measurements. For third party products a generic device is available, for which measurements can be added manually.

The principle is shown on the following pages.

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Add device to CUx000

Select interface: Modb us RS-485 or Ethernet

Add Modbus RTU Master to RS-485 Add Modbus TCP to Ethernet

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Parametrization of the Modbus RTU interface

The Ethernet interface does not require separate

As the RS-485 Modbus / RTU slave interface is deactivated when the master is activated, the device settings of this communication interface are no longer active. The transmission parameters of the RS-485 must therefore be set here.

settings. The network parameters of the device settings are applied. To prevent warnings in the CODESYS environment the interface can be set to eth0, wh ic h corresponds to the Ethernet settings of the device.

Connect a device to the master (here to Modbus RTU)

Example: Connecting a SINEAX DM5F

As long as the above window is displayed further devices can be selected and connected to the master using "Add device".

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Device address Modbus/RTU

IP address and TCP port for Modbus TCP Slave

Add the measurements to be read from the device

The Modbus interface allows reading single words or a multiple of them. The data type is determined by the assignment to a variable or a variable group.

Measurements can be queried individually or several at the same time. Individual readings typically have a length of 2 words, shown above for the queries 0 ... 2 (U1N, U2N, U3N). Each value can be selected directly from the list of available measurements using the opposite mask. The trigger can be used to define whether the value is to be polled cyclically or dependent on the state of a logical variable. The available measured quantities result from the selected access type.

With only one query also several measurements can be read simultaneously, shown above for the query 3, which provides the values U1N, U2N and U3N. In contrast to the queries 0 ... 2, where a direct assignment to one REAL variable is possible, the result of query 3 is assigned to a structure consisting of 3 REAL variables.

Assignment of the acquired measurement to variables

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8.7 Creating the CODESYS application

At this stage in the project the control application needs to be created. For that a POU (Programmable Organisation Unit) with name PLC_PRG was generated during project creation. Double click on this item to open the editor view.

In the declaration part variables and other POUs may be declared, which will be needed in this PLC_PRG. In the bottom part the program code will be written. On the right side a ToolBox is located, from where objects may be included into the program via Drag & Drop. The tool box depends on the programming language selected.

The further process for creating an application is not part of these brief instructions.

8.7.1 Using remanent variables

The device stores remanent variables in such a way that their contents remains unchanged even if the device is restarted or after a power-down.

The declaration of remanent variables is done by means of VAR RETAIN. The memory area for RETAIN variables is limited to 1000 bytes.

The content of remanent variables is reset under two conditions:

• Reset cold: All VAR and VAR RETAIN variables are reset

• Reset origin: When the PLC is reset to its original state, the application is deleted and thus all

assiociated variables

The various reset options are described in a separate chapter

8.7.2 Using the data logger

Exclusively for devices with performance class PROFESSIONAL a facility is provided to record data or messages via CODESYS over a longer period of time. To be able to use recording functions, the CENTRAX library must be added, which is part of the device description. This is done using the library manager.

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Recording capability Associated function

20 channels REAL (32-bit floa t ing point) stat := LogAdd_REAL(channel, value, timestamp) 20 channels LREAL (64-bit floating point) stat := LogAdd_LREAL(channel, value, timestamp) 20 channels BOOL, e.g. for events stat := LogAdd_BOOL(channel, value, timestamp)

with: stat: return value, TRUE if executed successfully

channel: recording channel 1…20 value: value to store timestamp: [ms] since 1.1.1970 00:00:00; set it to 0 to use the present system time

Amount of time per time unit

With more than approx. 17 function calls per second, functional failures (return value FALSE) can occur.

Channel description / unit

REAL / LREAL: Per recoding channel a description and a unit can be defined

BOOL: Per recoding channel an event text can be associated

Displaying CODESYS recordings

• Data is either available as a value table or event list

• Data can be exported exported in CSV format

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8.8 Creating own visualizations

Exclusively for devices with performance class PROFESSIONAL, it is possible to create own visualizations by menas of CODESYS, both for the local display as well as for WEB access.

8.8.1 Adding a visualization to the project

In the CODESYS project right-click on Application, Add object and then select Visualisization. In the Window Add visualisization assign a name to the visualization.

Via [VISU_TASK] the features of the visualization application can be defined

Using the [Visualization Manager] the features of the target resp. WEB visualiz atio n can be modi fied

[Image_1] is the area for creating the visualization

8.8.2 Target visualization (TargetVisu)

If the device is equipped with a local display, user-defi ned images can be used to display process data.

Usable resolution

• CU3000: 800 x 480 px

• CU5000: 320 x 240 px

The device keys (ESC, Up, Down, Left, Right) can be freely used for switching the displayed image, for selections or control purposes.

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Via device settings you can define if the standard images or the user-defined images of the device have to be displayed. A direct switching during operation is not possible.

8.8.3 WEB visualizations (WebVisu)

The user can define multiple web pages with any mechanism for changing the displayed image. The visualization begins with a definable start visualization. The starting page can be viewed in two ways:

a) http://<IP_ADDR>:8080/<NAME>.htm

<IP_ADDR>: IP address of the device, e.g. 192.168.1.101 <NAME>: Name of the .htm file used as start page, z.B. webvisu (see below)

b) Direct call via device website

Hint

This call works only if the name of the start visualization is left at the default webvisu.htm.

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8.9 Establishing a connection to the device

Double click on Device (CU3000/CU5000 Basic) in the device tree. The below shown view will be opened.

In the communication settings click on Scan Network. A list will be shown with all the devices visible from your PC.

The device is best identified by its hostname, defined in the Ethernet communication settings. In the above example the hostname CU3000TEST was assigned, the other device still has the initial setting CU3000xxxxx.

To be sure that you are communicating with the right device, select the device and click on Wink: The display of the associated device will start blinking for a few seconds.

Use OK to confirm your device selection. If OK is greyed out, even if “Wink” works fine, there may be a mismatch in the performance class used in the project (e.g. BASIC) and the type of the device (e.g. ADVANCED).

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Identification is possib le as w ell via the de vice ad dres s , in the above example 0301.A000.06D6. This address may be verified via the device webpag e.

In the service menu go to CODESYS | Device information:

8.10 Loading the application to the device

• Load the application to the device by going online with a click to

• If the device description in the device does not correspond to the version used in the CODESYS-IDE

for example the following warning message is displayed:

In this case the device description of the project can be updated. For that it needs to be installed in the CODESYS-IDE (see chapter 8.2

). Then the project can be updated:

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If the initial situation is reversed, i.e. the version of the device description used in the project is higher than the one of the device, either the firmware of the device must be updated or an older version of the device description must be used in the project. New firmware versions can be downloaded free of charge from our website

http://www.camillebauer.com/cu3000-en or http://www.camillebauer.com/cu5000-en

• If there is no application on the device, you will be asked to proceed with the download. Confirm with Yes.

• The program will be loaded to the device.

• The PLC is now connected and the application is in the STOP state. Change to RUN by clicking on .

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The present state of the application can also be seen vi a webpa ge: Service | CODESYS | PLC

Using the switch in the column „Change operating state“ the application may be stopped and started again at any time.

For devices with display the state of the application may be checked and changed also locally at the device: Service | COD ES Y S | PLC

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8.11 Loading the application on-site

8.11.1 Creating a boot application

For on-site loading of the control application into the device, first you have to create a boot application in the CODESYS development environment.

Two files will be created: <appl_name>.app und <appl_name>.crc. The user has to pack them in a ZIP file.

8.11.2 Deleting the active application

An application already running must to be deleted.

8.11.3 Loading the application

When loading the application the previously created ZIP file must be uploaded.

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8.11.4 Starting the application

The uploaded application is not automatically started. Use the switch in the column „Change operating state“ to start the applicati o n.

Only applications which have been uplo aded to the device via ZIP file can be downloaded to a PC again. The originally uploaded ZIP file will be exported.

8.11.5 Resetting the active application

The active application may be reset (R es et warm

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8.12 Reset

The PLC supports the reset operations described below.

Version Execution System behavior

• Application is stopped

• Standard variables (VAR) are initialized

• Remanent variables (VAR RETAIN) keep their

values

• Application is stopped

• All variables (VAR, VAR RETAIN) are initialized

Reset warm

Reset cold

• Res et via webpage

• Reset warm via

CODESYS

• Download application to

the device via IDE

• Loading the application via

webpage

• Reset cold via CODESYS

• Deleting the application via

Reset origin

Reset via CODESYS-IDE

webpage

• Reset origin via CODESYS

Reset PLC to ist origin

• Application is stopped and deleted from the device

• All variables (VAR, VAR RETAIN) are initialized

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8.13 Project management

Source download to the device

Source upload from the device

Source download to the device

The project created via CODESYS-IDE can be saved in the device. This simplifies the modification of the application on-site.

Hint: Initially the source code is not protected, but CODESYS supports a user management system and data encryption via certificates.

If the source code has been saved in the device, it may be uploaded again using the CODESYS development environment. This simplifies the modification of the application on-site.

Hint: Initially the source code is not protected, but CODESYS supports a user management system and data encryption via certificates.

8.14 Services

Unless otherwise agreed, the creation of the control application is the responsibility of the user. Thus, the user is solely responsible for the application he has created. Camille Bauer Metrawatt AG cannot guarantee that these applications will work properly and will not provide free support for error analysis.

In addition to the product CENTRAX CUx000 itself, Camille Bauer Metrawatt AG (and selected distributors) offers the following services:

• Creating the control application according to a customer specification

• Support Package when the control application is created by the customer

For more details on the services offered, please contact your local sales organization.

8.13 Example projects

For an easy beginning you may find example projects for a few control applications on our website:

http://www.camillebauer.com/cu3000-en or http://www.camillebauer.com/cu5000-en

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9. Service, maintenance and dispos a l

9.1 Calibration and new adjustment

Each device is adjusted and checked before delivery. The condition as supplied to the customer is measured and stored in electronic form.

The uncertainty of measurement devices may be altered during normal operation if, for example, the specified ambient conditions are not met. If desired, in our factory a calibration can be performed, including a new adjustment if necessary, to assure the accuracy of the device.

9.2 Cleaning

The display and the operating keys should be cleaned in regular intervals. Use a dry or slightly moist cloth for this.

Damage due to detergents

Detergents may not only affect the clearness of the display but also can damage the device. Therefore, do not use detergents.

9.3 Battery

The device contains a battery for buffering the internal clock. It cannot be changed by the user. The replacement can be done at the factory only.

If the UPS option is implemented, the associated battery pack needs to be exchanged regularly. For more information see chapter 5.11

9.4 Disposal

The product must be disposed in compliance with local regulations. This particularly applies to the built-in battery for the RTC and the battery pack of the UPS option.

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10. Technical data

Inputs

Nominal current: adjustable 1...5 A; max. 7.5 A (sinusoidal)

Measurement category: CAT III (300V) Consumption: ≤ I Overload capacity: 10 A continuous 100 A, 5 x 1 s, interval 300 s

Nominal voltage: 57.7…400 V Measurement max.: CU3000: 480 V Measurement category: CAT III (600V) Consumption: ≤ U Impedance: 1.54 MΩ per phase Overload capacity: continuous: 480 V 10 x 1 s, Intervall 10s: 800 V

Systems: Single phase Split phase (2-phase system) 3-wire, balanced load 3-wire, balanced load, phase shift (2xU,1xI) 3-wire, unbalanc ed lo ad 3-wire, unbalanc ed lo ad, Ar on con nec ti on

4-wire, balanced load 4-wire, unbalanc ed lo ad 4-wire, unbalanc ed lo ad, Open-Y

Nominal frequency: 42...50...58Hz or 50.5...60...69.5Hz, configurable

Sampling rate: 18 kHz

x 0.01 Ω per phase

, 100...693 VLL;

, 832 VLL (sinusoidal); CU5000: 520 VLN, 900 VLL (sinusoidal)

/ 1.54 MΩ per phase

, 832 VLL (CU3000); 520 VLN, 900 V

,1386 VLL

(CU5000)

Measurement uncertainty

Reference conditions: Acc. IEC/EN 60688, ambient 15…30°C,

sinusoidal input signals (form factor 1.1107), no fixed frequency for sampling,

measurement time 200ms (10 cycles at 50Hz, 12 cycles at 60Hz)

Voltage, current: ± 0.1%

Neutral current: ± 0.2%

Power: ± 0.2%

1) 2)

(if calculated)

1) 2)

Power factor: ± 0.2°

Frequency: ± 0.01 Hz

Imbalance U, I: ± 0.5%

Harmonics: ± 0.5%

THD U, I: ± 0.5%

Active energy: Class 0.5S, EN 62053-22

Reactive energy: Class 0.5S, EN 62053-24

Measurement with fixed system frequency:

General ± Basic uncertainty x (F

config–Factual

) [Hz] x 10 Imbalance U ± 2% up to ± 0.5 Hz Harmonics ± 2% up to ± 0.5 Hz THD, TDD ± 3.0% up to ± 0.5 Hz

Related to the nominal value of the basic quantity

Additional uncertainty if neutral wire not connected (3-wire connect ion s)

• Voltage, power: 0.1% of measured value; load factor: 0.1°

• Energy: Voltage influence x 2, angle influence x 2

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Zero suppression, range limitations

The measurement of specific quantities is related to a pre-condition which must be fulfilled, that the corresponding value can be determined and sent via interface or displayed. If this condition is not fulfilled, a default value is used for the measurement.

Quantity Condition Default

Voltage Ux < 1% Ux Current Ix < 0,1% Ix PF Sx < 1% Sx QF, LF, tanφ S x < 1% Sx Frequency voltage and/or current input too low 1) Nominal frequency Voltage unbalance Ux < 5% Ux Current unbalance mean value of phase currents < 5% Ix Phase angle U at least one voltage Ux < 5% Ux Harmonics U, THD-U fundamental < 5% Ux

Specific levels depend on the device configuration

0.00

nom

0.00

nom

1.00

nom

0.00

nom

0.00

nom

0.00

nom

120°

nom

0.00

nom

Power supply via terminals 13-14 Measurement category: CAT III (300V) Nominal voltage: (see nameplate)

• CU3000 V1: 110…230V AC 50/60Hz / 130…230V DC ±15% or V2: 24...48V DC ±15% or V3: 110…200V AC 50/60Hz / 110…200V DC ±15%

• CU5000 V1: 100…230V AC / DC ±15% or V2: 24...48V DC ±15%

Consumption: depends on the device hardware used ≤ 20 VA, ≤ 8.5W (CU3000), ≤ 12W (CU5000)

Available inputs / outputs and functional extensions

Basic unit

• 1 digital input

• 2 digital outputs

Extensions

Optional modules

• 2 relay outputs with changeover contacts

• 2 bipolar analog outputs

• 4 bipolar analog outputs

• 4 passive digital inputs

• 4 active digital inputs

• GPS connection module

• 2 failure current channels (residual or earth current)

• CU3000: Up to 4 I/O extensions may be present in the device. Only one module can be equipped with analog out puts.

• CU5000: Up to 2 I/O extensions may be present in the device.

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I/O interface

Analog outputs via plug-in terminals

Linearization: Linear, kinked Range: ± 20 mA (24 mA max.), bipolar Uncertainty: ± 0.2% of 20 mA Burden: ≤ 500 Ω (max. 10 V / 20 mA) Burden influence: ≤ 0.2% Residual ripple: ≤ 0.4% Response time: 220…420 ms

Relays

Contact: changeover contact Load capacity: 250 V AC, 2 A, 500 VA 30 V DC, 2 A, 60 W

Passive digital inputs

Nominal voltage 12 / 24 V DC (30 V max.) Input current < 7mA Logical ZERO - 3 up to + 5 V Logical ONE 8 up to 30 V Minimum pulse width 70…250ms

Active digital inputs

Open circuit voltage ≤ 15V Short circuit current < 15mA Current at R Minimum pulse width 70…250ms

Digital outputs

Nominal voltage 12 / 24 V DC (30 V max.) Nominal current 50 mA (60 mA max.) Load capability 400 Ω … 1 MΩ

Fault current detection

Number of channels 2; each channel provides two measurement ranges (2mA, 1A) Zero suppression Measurement < 0.2% of measurement range

Measurement range 1A

Application: Direct measurement of a fault or earth wire current Measurement transformer: Current transformer 1/1 up to 1000/1A Instrument security factor FS5 Rated output 0.2 up to 1.5 VA Measurement range: I Overload: 2A continuous; 20A, 5 x 1s, interval 300s Self-consumption: ≤ I2 x 0.1 Ω Monitoring: Alarm limit 0.03 … 1000 A (2 up to 100% of primary measurement range)

Measurement range 2mA

Application: Residual current monitoring (RCM) Measurement transformer: Residual current transformer 500/1 up to 1000/1A Rated burden 100 Ω / 0.025 VA up to 200 Ω / 0.06 VA Measurement range: I Overload: 40mA continuous; 200mA, 5 x 1s, interval 300s Self-consumption: ≤ I2 x 64 Ω Monitoring: Alarm limit 0.03 … 1 A

via plug-in terminals

=800Ω ≥ 2 mA

via plug-in terminals

= 1.0A (max. 1.2A; crest factor 3)

Rated

= 2mA (max. 2.4mA; crest factor 3)

Rated

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Further settings

Alarm limit for OFF AUS: I Prewarning limit: I Prewarning AUS: I

= 90…75% *)

OFF

= 50%...(I

WARN

- (10…25%) *)

WARN

OFF

-1%) *)

Response delay: 1…10s, separately for alarm and prewarning Dropout delay: 1…300s, separately for alarm and prewarning

All percent values are related to the alarm limit (100%)

Interfaces

Ethernet via RJ45 socket

Protocol: Modbus/TCP, NTP, http Physics: Ethernet 100BaseTX Mode: 10/100 Mbit/s, full/half duplex, auto-negotiation

IEC61850 via RJ45 sockets, 2 equivalent ports Protocol: IEC61850, NTP Physics: Ethernet 100BaseTX Mode: 10/100 Mbit/s, full/half duplex, auto-negotiation

Modbus/RTU via plug-in terminal (A, B, C/X) Protocol: Modbus/RTU Physics: RS-485, max. 1200m (4000 ft) Baud rate: 9'600, 19'200, 38'400, 57'600, 115'200 Baud Number of participants: ≤ 32

Internal clock (RTC)

Uncertainty: ± 2 minutes / month (15 u p to 30°C) Synchronization: none, via Ethernet (NTP protocol) or GPS Running reserve: > 10 years

Uninterruptible power supply (UPS)

Type: VARTA Easy Pack EZPAckL, UL listed MH16707 Nominal voltage: 3.7V Capacity: 1150 mAh min., 4.5 Wh Operating duration: 5 times 3 minutes Life time: 3 up to 5 years, depending on operating and ambient conditions

Ambient conditions, general information

Operating temperature: • Device without UPS: –10 up to 15 up to 30 up to + 55°C

• Device with UPS: 0 up to 15 up to 30 up to + 35°C

Storage temperature: Base device: –25 up to + 70°C; Battery pack UPS: -20…60°C (<1 month); -20°…45°C (< 3 months);

-20…30°C (< 1 year)

Temperature influence: 0.5 x measurement uncertainty per 10 K Long term drift: 0.5 x measurement uncertainty per year Others: Usage group II (EN 60 688) Relative humidity: < 95% no condensation Altitude: ≤ 2000 m max. Device to be used indoor only!

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Mechanical attributes

Housing material: Polycarbonate (Makrolon) Flammability class: V-0 acc. UL94, non-dripping, free of halogen Weight: 800 g (CU3000), 600g (CU5000) Dimensions: Dimensional drawings

Vibration withstand (test according to DIN EN 60 068-2-6)

Acceleration: • De vic e wit h display: ± 0.25 g (operating); 1.20 g (storage)

• Device without disp lay: ± 2 g Frequency range: 10 … 150 … 10 Hz, rate of frequency sweep: 1 octave/minute Number of cycles: 10 in each of the 3 axes

Safety

The current inputs are galvanically isolated from each other Protection class: II (protective ins ulat ion, vo lt age inp uts via protective impedance) Pollution degree: 2 Protection: IP40 (front), IP30 (housing), IP20 (terminals) Measurement category: CAT III Rated voltage Power supply V1: 100…230V AC / DC (CU3000) or

(versus earth): 100…230V AC / DC (CU5000)

Power supply V2: 24...48V DC ±15% Power supply V3: 110…200V AC / 110…200V DC ±15% (CU3000) Relay: 250 V AC (CAT III)

I/O’s: 24 V DC

Test voltages: Test time 60s, acc. IEC/EN 61010-1 (2011)

• power supply versus inputs U

• power supply versus inputs I: 3000V AC

• power supply V1 versus bus, I/O’s: 3000V AC

• power supply V2 versus bus, I/O’s: 880V DC

• inputs U versus inputs I: 1800V AC

• inputs U versus bus, I/O’s

• inputs I versus bus, I/O’s: 3000V AC

• inputs I versus inputs I: 1500V AC

During type test only, with all pr o tective impedances removed

: 3600 V AC

: 3600V AC

The device uses the principle of protective impedance for the voltage inputs to ensure protection against electric shock. All circuits of the device are tested during final inspection.

Prior to performing high voltage or isolation tests involving the voltage inputs, all output connections of the device, especially analog outputs, digital and relay outputs as well as Modbus and Ethernet interface, must be removed. A possible high-voltage test between i n p u t and output circuits must be limited to 500V DC, otherwise electronic components can be damaged.

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 80/106

Applied regulations, standards and directives

IEC/EN 61010-1 Safety regulations for electrical measuring, control and laboratory equipment IEC/EN 61000-4-30 Ed.3 Power quality measurement methods IEC/EN 61000-4-7 General guide on harmonics and interharmonics measurements EN 50160 Voltage characteristics of electricity supplied by public distribution systems IEC/EN 60688 Electrical measuring transducers for converting AC electrical variables into analog or

digital signals DIN 40110 AC quantities IEC/EN 60068-2-1/ Ambient tests

-2/-3/-6/-27: -1 Cold, -2 Dry heat, -3 Damp heat, -6 Vibration, -27 Shock IEC/EN 61000-6-2 Electromagnetic compatibility (EM C) 61000-6-4 Generic standards for industrial environment IEC/EN 61131-2 Programmable controllers - equipment, requirements and tests

(digital inputs/outputs 12/24V D C ) IEC/EN 61326 Electrical equipment for measurement, control and laboratory use - EMC requirements IEC/EN 62053-31 Pulse output devices for electromechanical and electronic meters (S0 output) IEC/EN 60529 Protection type by case UL94 Tests for flammability of plastic materials for parts in devices and appliances 2011/65/EU (RoHS) EU directive on the restr ict ion of the use of cert ain haz ardo us substances

Warning

This is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

This device complies with part 15 of the FCC: Operation is subject to the following two conditions: (1) This device may not cause harmful interference,

and (2) this device must accept any interference received, including interference that may cause undesired operation.

This Class A digital apparatus complies with Canadian ICES-0003.

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11. Dimensional drawings

CENTRAX CU3000

CENTRAX CU5000

Dimensions Orientation

0…90° 0…90°

______1)_______

Not allowed for device versions with UPS

All dimensions in [mm]

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 82/106

Annex

Voltage U

● ● ● √ √ √ √

● ● ● √ √ √

Voltage U2N

● ● ● √ √ √

Voltage U3N

● ● ● √ √

Voltage U12

● ● ● √ √ √ √ √

Voltage U23

● ● ● √ √ √ √ √

Voltage U31

● ● ● √ √ √ √ √

Zero displacement voltage UNE

● ● √ √ √ √ √

● ● √ √ √ √

Current I1

● ● √ √ √ √ √

Current I2

● ● √ √ √ √ √

● ● √ √ √ √

Neutral current IN

● ● √ √ √ √ √

Earth current IPE (calculated)

● ● √ √

Active power P

● ● √ √ √ √ √ √ √ √ √

Active power P1

● ● √ √ √

Active power P2

● ● √ √ √

Active power P3

● ● √ √

Fundamental active power P(H1)

● ● √ √ √ √ √ √ √ √ √

Fundamental active power P1(H1)

● ● √ √ √

Fundamental active power P2(H1)

● ● √ √ √

● ● √ √

Total reactive power Q

● ● √ √ √ √ √ √ √ √ √

Total reactive power Q1

● ● √ √ √

Total reactive power Q2

● ● √ √ √

Total reactive power Q3

● ● √ √

Distortion reactive power D

● ●

√ √ √ √ √ √ √ √ √ Distortion reactive power D1

● ●

√ √ √ Distortion reactive power D2

● ●

√ √ √ Distortion reactive power D3

● ●

√ √ Fundamental reactive power Q(H1)

● ●

√ √ √ √ √ √ √ √ √

Fundamental reactive power Q1(H1)

● ●

Fundamental reactive power Q2(H1)

● ●

√ √ √

Fundamental reactive power Q3(H1)

● ●

√ √

A Description of measured quantiti e s

Used abbreviations

1L Single phase sy ste m 2L Split pha se; system with 2 p ha ses and center tap 3Lb 3-wire system with balanced load 3Lb.P 3-wire system with balanced load, phase shift (only 2 voltages connected) 3Lu 3-wire system with unbalanced load 3Lu.A 3-wire system with unbalanced load, Aron connection (only 2 currents connected) 4Lb 4-wire system with balanced load 4Lu 4-wire system with unbalanced load 4Lu.O 4-wire system with unbalanced load, Open-Y (reduced voltage connection)

A1 Basic measurements

The basic measured quantities are calculated each 200ms by determining an average over 10 cycles at 50Hz resp. 12 cycles at 60Hz. If a measurement is available depends on the selected system.

Depending on the measured quantity also minimum and maximum values are determined and non-volatile stored with timestamp. These values may be reset by the user via display, see resetting of measurements

Measurement

Voltage U1N

Current I

Current I3

Fundamental active power P3(H1)

present

max

min

3Lb

3Lb.P

3Lu

3Lu.A

4Lb

4Lu.O

4Lu

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√ √ √

Measurement

Apparent power S

● ● √ √ √ √ √ √ √ √ √

Apparent power S1

● ● √ √ √

Apparent power S2

● ● √ √ √

● ● √ √

Fundamental apparent power S(H1)

● ● √ √ √ √ √ √ √ √ √

Fundamental apparent power S1(H1)

● ● √ √ √

Fundamental apparent power S3(H1)

● ● √ √

Frequency F

● ● ● √ √ √ √ √ √ √ √ √ Power factor PF

● √ √ √ √ √ √ √ √ √

Power factor PF1

● √ √ √

Power factor PF2

● √ √ √

Power factor PF3

● √ √

PF quadrant I

● √ √ √ √ √ √ √ √ √

PF quadrant II

● √ √ √ √ √ √ √ √ √

PF quadrant III

● √ √ √ √ √ √ √ √ √

Reactive power factor QF

● √ √ √ √ √ √ √ √ √

Reactive power factor QF1

● √ √ √

Reactive power factor QF2

● √ √ √

Reactive power factor QF3

● √ √

Load factor LF

● √ √ √ √ √ √ √ √ √

Load factor LF1

● √ √ √

Load factor LF2

● √ √ √

Load factor LF3

● √ √

cosφ (H1)

● √ √

√ √ √ √ √ √ √

● √

√ √

cosφ L2 (H1)

● √

√ √

cosφ L3 (H1)

●

√ √

cosφ (H1) quadrant I

● √ √ √ √ √ √ √ √

√

cosφ (H1) quadrant II

● √ √ √ √ √ √ √ √

√

cosφ (H1) quadrant III

● √ √ √ √ √ √ √ √

√

cosφ (H1) quadrant IV

● √ √ √ √ √ √ √ √

√

tanφ (H1)

● √ √

√ √ √ √ √ √ √

tanφ L1 (H1)

● √

√ √

tanφ L2 (H1)

● √

√ √

●

√ √

mean

=(U1N+U2N)/2

● √

mean

=(U1N+U2N+U3N)/3

● √

=(U12+U23+U31)/3

● √ √ √

mean

=(I1+I2)/2

● √

mean

=(I1+I2+I3)/3

● √ √ √

IMS, Average current with sign of P

● √ √ √ √ √ √ √ √ √

Phase angle between U1 and U2

● √ √ √ √ √

Phase angle between U2 and U3

● √ √ √ √ √

Phase angle between U3 and U1

● √ √ √ √ √

● √ √ √ √ √ √

Angle between U1 and I1

● √ √ √

Angle between U2 and I2

● √ √ √

Angle between U3 and I3

● √ √

Maximum ΔU <> Um 1)

● ● √ √ √ √ √

Maximum ΔI <> Im 2)

● ● √ √ √

√

maximum deviation from the mean value of all currents (see A3)

●

Available via communication interface only

Apparent power S3

Fundamental apparent power S2(H1)

PF quadrant IV

present

max

min

3Lb

3Lb.P

3Lu

3Lu.A

4Lb

4Lu.O

4Lu

cosφ L1 (H1)

tanφ L3 (H1)

mean

Angle between U and I

maximum deviation from the mean value of all voltages (see A3)

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Reactive power

The power fact or PF gives the relation

Most of the loads consume a combination of ohmic and inductive current from the power system. Reactive power arises by means of the inductive load. But the number of non-linear loads, such as RPM regulated drives, rectifiers, thyristor controlled systems or fluorescent lamps, is increasing. They cause nonsinusoidal AC currents, which may be represented as a sum of harmonics. Thus the reactive power to transmit increases and leads to higher transmission losses und higher energy costs. This part of the reactive power is called distortion reactive power.

Normally reactive power is unwanted, because there is no usable active component in it. Because the transmission of reactive power over long distances is uneconomic, it makes sense to install compensation systems close to the consumers. So transmission capacities may be used better and losses and voltage drops by means of harmonic currents can be avoided.

P: Active power S: Apparent power including harmonic

components S1: Fundamen tal appa rent power Q: Total reactive power Q(H1): Fundamental reactive power D: Distortion reactive power

The reactive power may be divided in a fundamental and a distortion component. Only the fundamental reactive power may be compensated directly by means of the classical capacitive method. The distortion components have to be combated using inductors or active harmonic conditioners.

The load factor PF is the relation between active power P and apparent power S, including all possibly existing harmonic parts. This factor is often called cosφ, which is only partly correct. The PF corresponds to the cosφ only, if there is no harmonic content present in the system. So the cosφ represents the relation between the active power P and the fundamental apparent power S(H1).

The tanφ is often used as a target quantity for the capacitive reactive power compensation. It corresponds to the relation of the fundamental reactive power Q(H1) and the active power P.

Power factors

between active and apparent power. If there are no harmonics present in the system, it corresponds to the cosφ. The PF has a range of -1...0...+1, where the sign gives the direction of energy flow.

The load factor LF is a quantity derived from the PF, which allows making a statement about the load type. Only this way it's possible to measure a range like

0.5 capacitive ... 1 ... 0.5 inductive in a non-ambiguou s way.

The reactive power factor QF gives the relation between reactive and apparent power.

Example from the perspective of an energy consumer

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Zero displacement voltage UNE

Starting from the generating system with star point E (which is normally earthed), the star point (N) on load side is shifted in case of unbalanced load. The zero displacement voltage between E und N may be determined by a vectorial addition of the voltage vectors of the three phases:

UNE = - (U1N + U2N + U3N ) / 3

A displacement voltage may also occur due to harmonics of order 3, 9, 15, 21 etc., because the dedicated currents add in the neutral wire.

Earth fault monitoring in IT systems

Via the determination of the zero displacement voltage it's possible to detect a first earth fault in an unearthed IT system. To do so, the device is configured for measurement in a 4-wire system with unbalanced load and the neutral connector is connected to earth. In case of a single phase earth fault there is a resulting zero displacement voltage of ULL/ √3. The alarming may be done e.g. by means of a relay output.

Transformer, secondary side Load

Because in case of a fault the voltage triangle formed by the three phases does not change, the vo lta ge and current measurements as well as the system power values will still be measured and displayed correctly. Also the meters carry on to work as expected.

The method is suited to detect a fault condition during normal operation. A declination of the isolation resistance may not be detected this way. This should be measured during a periodical control of the system using a mobile system.

Another possibility to analyze fault conditions in a grid offers the method of the symmetrical components as described in A3.

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A2 Harmonic analysis

present

max

3Lb

3Lb.P

3Lu

3Lu.A

4Lb

4Lu.O

4Lu

THD Voltage U1N/U

● ● √ √ √ √ √ √

THD Voltage U2N

● ● √ √ √

THD Voltage U3N

● ● √ √

THD Voltage U12

● ● √ √ √

THD Voltage U23

● ● √ √ √

THD Voltage U31

● ● √ √ √

● ● √ √ √ √ √ √ √ √ √

THD Current I2

● ● √ √ √ √ √

THD Current I3

● ● √ √ √ √

TDD Current I1/I

● ● √ √ √ √ √ √ √ √ √

TDD Current I2

● ● √ √ √ √ √

TDD Current I3

● ● √ √ √ √

Harmonic contents 2nd...50th U1N/U

● ● √ √ √ √ √ √

Harmonic contents 2nd...50th U2N

● ● √ √ √

Harmonic contents 2nd...50th U3N

● ● √ √

Harmonic contents 2nd...50th U12

● ● √ √ √

Harmonic contents 2nd...50th U31

● ● √ √ √

Harmonic contents 2nd...50th I1/I

● ● √ √ √ √ √ √ √ √ √

Harmonic contents 2nd...50th I2

● ● √ √ √ √ √

Harmonic contents 2nd...50th I3

● ● √ √ √ √

●

Available via communication interface only

The harmonic analysis is performed according IEC 61000-4-7 over 10 cycles at 50Hz resp. 12 cycles at 60Hz. If a measured quantity is available depends on the selected system.

Measurement

THD Current I1/I

Harmonic contents 2nd...50th U23

Harmonic contents are available up to the 89 (60Hz) on the Modbus interface

(50Hz) or 75th

Harmonics

Harmonics are multiples of the fundamental resp. system frequency. They arise if non-linear loads, such as RPM regulated drives, rectifiers, thyristor controlled systems or fluorescent lamps are present in the power system. Thus undesired side effects occur, such as additional thermal stress to operational resources or electrical mains, which lead to an advanced aging or even damage. Also the reliability of sensitive loads can be affected and unexplainable disturbances may occur. In industrial networks the image of the harmonics gives good information about the kind of loads connected. See also:

► Increase of reactive power due to harmonic currents

TDD (Total Demand Distortion)

The complete harmonic content of the currents is calculated additionally as Total Demand Distortion, briefly TDD. This value is scaled to the rated current resp. rated power. Only this way it's possible to estimate the influence of the current harmonics on the connected equipment correctly.

Maximum values

The maximum values of the harmonic analysis arise from the monitoring of THD and TDD. The maximum values of individual harmonics are not monitored separately, but are stored if a maximum value of THD or TDD is detected. The image of the maximum harmonics therefore always corresponds to the dedicated THD resp. TDD.

The accuracy of the harmonic analysis strongly depends on the quality of the current and voltage transformers possibly used. In the harmonics range transformers normally change both, the amplitude and the phase of the signals to measure. It's valid: The higher the frequency of the harmonic, the higher its damping resp. phase shift.

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A3 System imbalance

UR1: Positive sequence [V]

● √ √ √ √ UR2: Negative sequence [V]

● √ √ √

√

U0: Zero sequence [V]

● √ U: Imbalance UR2/UR1

● ● √ √ √

√

U: Imbalance U0/UR1

● ● √ IR1: Positive sequence [A]

● √ √

√

IR2: Negative sequence [A]

● √ √

√

● √

√

I: Imbalance IR2/IR1

● ● √ √ √ I: Imbalance I0/IR1

● ● √

√

●

Available via communication interface only

Measured quantity

present

max

min

3Lb

3Lb.P

3Lu

3Lu.A

4Lb

4Lu.O

4Lu

I0: Zero sequence [A]

Imbalance in three-phase systems may occur due to single-phase loads, but also due to failures, such as e.g. the blowing of a fuse, an earth fault, a phase failure or an isolation defect. Also harmonics of the 3rd, 9th, 15th, 21st etc. order, which add in the neutral wire, may lead to imbalance. Operating resources dimensioned to rated values, such as three-phase generators, transformers or motors on load side, may be excessively stressed by imbalance. So a shorter life cycle, a damage or failure due to thermal stress can result. Therefore monitoring imbalance helps to reduce the costs for maintenance and extends the undisturbed operating time of the used resources.

Imbalance or unbalanced load relays use different measurement principles. One of them is the approach of the symmetrical components, the other one calculates the maximum deviation from the mean-value of the three phase values. The results of these methods are not equal and don't have the same intention. Both of these principles are implemented in the device.

Symmetrical components (acc. Fortescue)

The imbalance calculation method by means of the symmetrical components is ambitious and intensive to calculate. The results may be used for disturbance analysis and for protection purposes in three-phase systems. The real existing system is divided in symmetrical system parts: A positive sequence, a negative sequence and (for systems with neutral conductor) a zero sequence system. The approach is easiest to understand for rotating machines. The positive sequence represents a positive rotating field, the negative sequence a negative (braking) rotating field with opposite sense of direction. Therefore the negative sequence prevents that the machine can generate the full turning moment. For e.g. generators the maximum permissible current imbalance is typically limited to a value of 8...12%.

Maximum deviation from the mean value The calculation of the maximum deviation from the mean value of the phase currents resp. phase voltages gives the information if a grid or substation is imbalanced loaded. The results are independent of rated values and the present load situation. So a more symmetrical system can be aspired, e.g. by changing loads from one phase to another.

Also failure detection is possible. The capacitors used in compensation systems are wear parts, which fail quite often and then have to be replaced. When using three phase power capacitors all phases will be compensated equally which leads to almost identical currents flowing through the capacitors, if the system load is comparable. By monitoring the current imbalance it's then possible to estimate if a capacitor failure is present.

The maximum deviations are calculated in the same steps as the instantaneous values and therefore are arranged there (see A1

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 88/106

A4 Mean values and trend

Active power I+IV 10s...60min. 1)

● ● ● ● 5

Active power II+III 10s...60min. 1)

● ● ● ● 5

Reactive power I+II 10s...60min. 1)

● ● ● ● 5

Apparent power 10s...60min. 1)

● ● ● ● 5

Mean value quantity 1 10s...60min. 2)

● ● ● ● 1

….

Mean value quantity 12 10s...60min. 2)

● ● ● ● 1

Interval time t1 2) Interval time t2

Bimetal current IB, 1...60min. 3)

● ● √ √ √ √

Bimetal current IB1, 1...60min. 3)

● ● √ √ √ √ √

Bimetal current IB2, 1...60min. 3)

● ● √ √ √ √ √

Bimetal current IB3, 1...60min. 3)

● ● √ √ √ √

Interval time t3

Measured quantity

Present

Trend

max

min

History

Reactive power III+IV 10s...60min. 1)

The device calculates automatically the mean values of all system power quantities. In addition up to 12

further mean value quantities can be freely selected.

Calculating the mean-values

The mean value calculation is performed via integration of the measured instantaneous values over a configurable averaging interval. The interval time may be selected in the range from 10 seconds up to one hour. Possible interim values are set the way that a multiple of it is equal to a minute or an hour. Mean values of power quantities (interval time t1) and free quantities (interval time t2) may have different averaging intervals.

Synchronization

For the synchronization of the averaging intervals the internal clock or an external signal via digital input may be used. In case of an external synchronization the interval should be within the given range of one second up to one hour. The synchronization is important for making e.g. the mean value of power quantities on generating and demand side comparable.

Trend

The estimated final value (trend) of mean values is determined by weighted addition of measurements of

the past and the present interval. It serves for early detection of a possible exceeding of a given maximum value. This can then be avoided, e.g. by switching off an active load.

History

For mean values of system powers the last 5 interval values may be displayed on the device or read via

interface. For configurable quantities the value of the last interval is provided via communication interface.

Bimetal current

This measured quantity serves for measuring the long-term effect of the current, e.g. for monitoring the warming of a current-carrying line. To do so, an exponential function is used, similar to the charging curve of a capacitor. The response time of the bimetal function can be freely selected, but normally it corresponds to the interval for determining the power mean-values.

Measured quantity

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 89/106

Present

max

min

3Lb

3Lb.P

3Lu

3Lu.A

4Lb

4Lu.O

4Lu

A5 Meters

Measured quantity

Active energy I+IV, high tariff Active energy II+III, high tariff Reactive energy I+II, high tariff Reactive energy III+IV, high tariff Active energy I+IV, low tariff Active energy II+III, low tariff Reactive energy I+II, low tariff Reactive energy III+IV, low tariff User configured meter 1 User configured meter 2 User configured meter 3 User configured meter 4 User configured meter 5 User configured meter 6 User configured meter 7 User configured meter 8 User configured meter 9 User configured meter 10 User configured meter 11 User configured meter 12

3Lb

3Lb.P

3Lu

3Lu.A

4Lb

4Lu.O

● ● ● ● ● ● ● ● ●

Only basic quantities can be selected which

are supported in the present system.

4Lu

Standard meters

The meters for active and reactive energy of the system are always active.

User configured meters

To each of these meters the user can freely assign a basic quantity.

Programmable meter resolution

For all meters the resolution (displayed unit) can be selected almost freely. This way, applications with short measurement times, e.g. energy consumption of a working day or shift, can be realized. The smaller the basic unit is selected, the faster the meter overflow is reached.

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 90/106

B Display matrices

B0 Used abbreviations for the measurements

Instantaneous values

Name Measurement identification Unit Description

U U U1N U U2N U U3N U U12 U U23 U U31 U UNE U I I I1 I I2 I I3 I IN I IPE I P P P1 P P2 P P3 P Q Q Q1 Q Q2 Q Q3 Q S S S1 S S2 S S3 S F F PF PF PF1 PF PF2 PF PF3 PF QF QF QF1 QF QF2 QF QF3 QF LF LF LF1 LF LF2 LF LF3 LF UR1 U UR2 U U0 U IR1 I IR2 I I0 I UR2R1 U IR2R1 I U0R1 U I0R1 I IMS I

TRMS 1N TRMS 2N TRMS 3N TRMS 12 TRMS 23 TRMS 31 TRMS NE TRMS TRMS 1 TRMS 2 TRMS 3 TRMS N TRMS PE TRMS TRMS 1 TRMS 2 TRMS 3 TRMS TRMS 1 TRMS 2 TRMS 3 TRMS TRMS 1 TRMS 2 TRMS 3 TRMS TRMS TRMS 1 TRMS 2 TRMS 3 TRMS TRMS 1 TRMS 2 TRMS 3 TRMS TRMS 1 TRMS 2 TRMS 3 TRMS pos SEQ neg SEQ zero SEQ pos SEQ neg SEQ zero SEQ neg/pos UNB neg/pos UNB zero/pos UNB zero/pos UNB

TRMS

- +

V Voltage system V Voltage between phase L1 and neutral V Voltage between phase L2 and neutral V Voltage between phase L3 and neutral V Voltage between phases L1 and L2 V Voltage between phases L2 and L3 V Voltage between phases L3 and L1 V Zero displacement voltage 4-wire systems A Current system A Current phase L1 A Current phase L2 A Current phase L3 A Neutral current

W Active power system (P=P1+P2+P3) W Active power phase L1 W Active power phase L2 W Active power phase L3 var Reactive power system (Q=Q1+Q2+Q3) var Reactive power phase L1 var Reactive power phase L2 var Reactive power phase L3 VA Apparent power system VA Apparent power phase L1 VA Apparent power phase L2 VA Apparent power phase L3 Hz System frequency Active power factor P/S Active power factor P1/S1 Active power factor P2/S2 Active power factor P3/S3 Reactive power factor Q / S Reactive power factor Q1 / S1 Reactive power factor Q2 / S2 Reactive power factor Q3 / S3 Load factor system Load factor phase L1 Load factor phase L2 Load factor phase L3 V Positive sequence voltage V Negative sequence voltage V Zero sequence voltage A Positive sequence current A Negative sequence current A Zero sequence current % Unbalance fact or voltage UR2/UR1 % Unbalance factor current IR2/IR1 % Unbalance fact or voltage U0/ UR1 % Unbalance factor current I0/IR1

A Average current with sign of P

Earth current

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 91/106

Minimum and maximum of instantaneous values

var

Name Measurement identification Unit Description

U_MM U U1N_MM U U2N_MM U U3N_MM U U12_MM U U23_MM U U31_MM U UNE_MAX U

I_MAX I I1_MAX I I2_MAX I I3_MAX I IN_MAX I IPE_MAX I P_MAX P P1_MAX P P2_MAX P P3_MAX P Q_MAX Q Q1_MAX Q Q2_MAX Q Q3_MAX Q S_MAX S S1_MAX S S2_MAX S S3_MAX S F_MM F UR21_MAX IR21_MAX THD_U_MAX THD_U1N_MAX THD_U2N_MAX

U I U U

U THD_U3N_MAX U THD_U12_MAX U THD_U23_MAX U THD_U31_MAX U TDD_I_MAX TDD_I1_MAX TDD_I2_MAX TDD_I3_MAX

1N 2N 3N 12 23 31 NE

1 2 3 N PE

1 2 3

neg/pos neg/pos

1N 2N 3N 12 23 31

1 2 3

UNB UNB THD THD THD THD THD THD THD TDD TDD TDD TDD

TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS

TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS TRMS

V V V V V V V V Maximum value of UNE

Minimum and maximum value of U Minimum and maximum value of U1N Minimum and maximum value of U2N Minimum and maximum value of U3N Minimum and maximum value of U12 Minimum and maximum value of U23 Minimum and maximum value of U31

Maximum value of I

Maximum value of I1 Maximum value of I2 Maximum value of I3 Maximum value of IN Maximum value of IPE

Maximum value of P Maximum value of P1 Maximum value of P2 Maximum value of P3

var

Maximum value of Q Maximum value of Q1 Maximum value of Q2

VA VA VA VA

Maximum value of Q3 Maximum value of S Maximum value of S1 Maximum value of S2 Maximum value of S3

Minimum and maximum value of F % % % % %

Maximum value of UR2/UR1

Maximum value of IR2/IR1

Max. Total Harmonic Distortion of U

Max. Total Harmonic Distortion of U1N

Max. Total Harmonic Distortion of U2N % Max. Total Harmonic Distortion of U3N % Max. Total Harmonic Distortion of U12 % Max. Total Harmonic Distortion of U23 % Max. Total Harmonic Distortion of U31 % % % %

Max. Total Demand Distortion of I

Max. Total Demand Distortion of I1

Max. Total Demand Distortion of I2

Max. Total Demand Distortion of I3

TS: Timestamp of occurrence, e.g. 2014/09/17 11:12:03

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 92/106

Mean-values, trend and bimetal current

(m): Short description of basic quantity, e.g. „P“

(qg): Graphical quadrant information, e.g.

(p): Phase reference of the selected quantity, e.g. „1 “

(q): Quadrant information, e.g. „I+IV“

Name Measurement identification Unit Description

M1 M2 …. M11 M12 TR_M1 TR_M2 …. TR_M11 TR_M12 IB IB1 IB2 IB3

(m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) IB IB 1 IB 2 IB 3

(t2) (t2) (t2) (t2) (t2) (t2) (t2) (t2) (t2) (t2) (t3) (t3) (t3) (t3)

(mu) (mu) (mu) (mu) (mu) (mu) (mu) (mu) (mu) (mu) A A A A

Minimum and maximum of mean-values and bimetal-current

Name Measurement identification Unit Description

M1_MM M2_MM …. M11_MM M12_MM

IB_MAX IB1_MAX IB2_MAX IB3_MAX

(m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) (m) (p) (q) IB

IB 1 IB 2 IB 3

(t2) (t2) (t2) (t2) (t2) (t3)

(t3) (t3) (t3)

.. .. .. .. .. A

A A A

Mean-value 1 Mean-value 2 …. Mean-value 11 Mean-value 12 Trend mean-value 1 Trend mean-value 2 …. Trend mean-value 11 Trend mean-value 12 Bimetal current, system Bimetal current, phase L1 Bimetal current, phase L2 Bimetal current, phase L3

Min/Max mean-value 1 Min/Max mean-value 2 …. Min/Max mean-value 11 Min/Max mean-value 12

Maximum bimetal current, system Maximum Bimetal current, phase L1 Maximum Bimetal current, phase L2 Maximum Bimetal current, phase L3

Meters

Name Measurement identification Unit Description

ΣP_I_IV_HT P ΣP_II_III_HT P ΣQ_I_II_HT Q ΣQ_III_IV _HT Q ΣP_I_IV_LT P ΣP_II_III _LT P ΣQ_I_II _LT Q ΣQ_III_IV_LT Q ΣMETER1 (m) (p) (qg) Σ(T) ΣMETER2 (m) (p) (qg) Σ(T) ….. (m) (p) (qg) Σ(T) ΣMETER11 (m) (p) (qg) Σ(T) ΣMETER12 (m) (p) (qg) Σ(T)

ΣHT ΣHT ΣHT ΣHT ΣLT ΣLT ΣLT ΣLT

Wh Meter P I+IV, high tariff Wh Meter P II+III, high tariff varh Meter Q I+II, high tariff varh Meter Q III+IV, high tari ff Wh Meter P I+IV, low tariff Wh Meter P II+III, low tariff varh Meter Q I+II, low tariff varh Meter Q III+IV, low tariff (mu) User meter 1, tariff HT or LT (mu) (mu) (mu) (mu)

(T): Associated tariff, e.g. „HT" or „LT“ (mu): Unit of basic quantity

User meter 2, tariff HT or LT ….. User meter 11, tariff HT or LT User meter 12, tariff HT or LT

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 93/106

Graphical measurement displays

Trend, last 5 interval values, minimum and maximum

Graphic mean-value Q (I+II)

Trend, last 5 interval values, minimum and maximum

Graphic mean-value Q (III+IV)

Trend, last 5 interval values, minimum and maximum

Graphic mean-value S:

Graphic: Odd harmonics 3rd up to 49th + Total Harmonic Distortion of all

voltages

currents

Graphic: Even harmonics 2nd up to 50th + Total Harmonic Distortion of all

Graphic: Maximum values odd harmonics 3rd up to 49th + Total Harmonic

Graphic: Maximum values even harmonics 2nd up to 50th + Total Harmonic

Distortion of all voltages

Graphic: Maximum values even harmonics 2nd up to 50th + Total Harmonic

Distortion of all currents

Name Presentation Description

Graphic of the power triangle consisting of:

• Active, reactive and apparent power Px, Qx, Sx

Px_TRIANGLE

• Distortion reactive power Dx

• Fundamental reactive power Qx(H1)

• cos(φ) of fundamental

• Active power factor PFx

PF_MIN

Cφ_MIN (as PF_MIN) Graphic: Minimum cos(φ) in all 4 quadrants

I> m.1 / m.2

MT_P_I_IV

MT_P_II_III (as MT_P_I_IV)

MT_Q_I_II (as MT_P_I_IV)

MT_Q_III_IV (as MT_P_I_IV )

MT_S (as MT_P_I_IV)

Graphic: Minimum active power factor PF in all 4 quadrants

Graphic: Present measurements and states of fault-current monitoring

Data available only, if the device is equipped with at least one optional fault-current module.

Graphic mean-value P (I+IV) Trend, last 5 interval values, minimum and maximum

Graphic mean-value P (II+III)

Trend, last 5 interval values, minimum and maximum

HO_IX

HO_UX (as HO_IX)

HE_IX (as HO_IX)

HE_UX (as HO_IX)

HO_UX_MAX (as HO_IX)

HO_IX_MAX (as HO_IX)

HE_UX_MAX (as HO_IX)

HE_IX_MAX (as HO_IX)

PHASOR

Graphic: Odd harmonics 3rd up to 49th + Total Harmonic Distortion of all

currents

Graphic: Even harmonics 2nd up to 50th + Total Harmonic Distortion of all

voltages

Distortion of all voltages

Distortion of all currents

Graphic: All current and voltage phasors with present load situation

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 94/106

B1 Display matrices for single phase system

U_MM

UNE

UNE_MAX

F_MM

I_MAX

IN_MAX

IMS

P_MAX

Q_MAX

S_MAX

P_TRIANGLE

PF_MIN

Cφ_MIN

I> 1.1 / 1.2

I> 2.1 / 2.2

I> 3.1 / 3.2

I> 4.1 / 4.2

ΣP_I_IV_HT

ΣP_I_IV_NT

ΣP_II_III _NT

ΣP_II_III_HT

ΣQ_I_II_HT

ΣQ_I_II _NT

ΣQ_III_IV _HT

ΣQ_I_II _NT

ΣMETER1

ΣMETER2

ΣMETER3

ΣMETER4

ΣMETER5

ΣMETER6

ΣMETER7

ΣMETER8

ΣMETER10

ΣMETER11

ΣMETER12

MT_P_I_IV

MT_P_II_III

MT_Q_I_II

MT_Q_III_IV

MT_S

M1 / TR_M1

M1_MM

M2 / TR_M2

M2_MM

M3 / TR_M3

M3_MM

M4 / TR_M4

M4_MM

M5 / TR_M5

M5_MM

M6 / TR_M6

M6_MM

For CU5000

M7 / TR_M7

M7_MM

divided into

M8 / TR_M8

M8_MM

2 images each

M9 / TR_M9

M9_MM

M10 / TR_M10

M10_MM

M11 / TR_M11

M11_MM

M12 / TR_M12

M12_MM

IB1

IB2

IB1_MAX

IB2_MAX

Display menu Corresponding matrix

ΣMETER9

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 95/106

B2 Display matrices for split-phase (two-phase) systems

U1N

U1N_MM

U2N

U2N_MM

U_MM

UNE

UNE_MAX

I1_MAX

I2_MAX

IN_MAX

IPE

IPE_MAX

P P1

P_MAX / P1_MAX

For CU5000

Q_MAX / P2_MAX

divided into

S_MAX / Q1_MAX

2 images

F_MM / Q2_MAX

P_TRIANGLE

P1_TRIANGLE

P2_TRIANGLE

PF_MIN

Cφ_MIN

I> 1.1 / 1.2

I> 2.1 / 2.2

I> 3.1 / 3.2

I> 4.1 / 4.2

ΣP_I_IV_HT

ΣP_I_IV_NT

ΣP_II_III _NT

ΣP_II_III_HT

ΣQ_I_II_HT

ΣQ_I_II _NT

ΣQ_III_IV _HT

ΣQ_I_II _NT

ΣMETER1

ΣMETER2

ΣMETER3

ΣMETER4

ΣMETER5

ΣMETER6

ΣMETER7

ΣMETER8

ΣMETER10

ΣMETER11

ΣMETER12

MT_P_I_IV

MT_P_II_III

MT_Q_I_II

MT_Q_III_IV

MT_S

M1 / TR_M1

M1_MM

M2 / TR_M2

M2_MM

M3 / TR_M3

M3_MM

M4 / TR_M4

M4_MM

M5 / TR_M5

M5_MM

M6 / TR_M6

M6_MM

For CU5000

M7 / TR_M7

M7_MM

divided into

M8 / TR_M8

M8_MM

2 images each

M9 / TR_M9

M9_MM

M10 / TR_M10

M10_MM

M11 / TR_M11

M11_MM

M12 / TR_M12

M12_MM

IB1

IB2

IB1_MAX

IB2_MAX

Display menu Corresponding matrix

ΣMETER9

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 96/106

B3 Display matrices for 3-wire system, balanced load

U12

U12_MM

UR1 U23

U23_MM

UR2 U31

U31_MM

UR2R1

F F_MM

UR21_MAX

I I_MAX

IMS P

P_MAX

Q Q_MAX

S S_MAX

P_TRIANGLE

PF_MIN

Cφ_MIN

I> 1.1 / 1.2

I> 2.1 / 2.2

I> 3.1 / 3.2

I> 4.1 / 4.2

ΣP_I_IV_HT

ΣP_I_IV_NT

ΣP_II_III _NT

ΣP_II_III_HT

ΣQ_I_II_HT

ΣQ_I_II _NT

ΣQ_III_IV _HT

ΣQ_I_II _NT

ΣMETER1

ΣMETER2

ΣMETER3

ΣMETER4

ΣMETER5

ΣMETER6

ΣMETER7

ΣMETER8

ΣMETER9

ΣMETER10

ΣMETER11

ΣMETER12

MT_P_I_IV

MT_P_II_III

MT_Q_I_II

MT_Q_III_IV

MT_S

M1 / TR_M1

M1_MM

M2 / TR_M2

M2_MM

M3 / TR_M3

M3_MM

M4 / TR_M4

M4_MM

M5 / TR_M5

M5_MM

M6 / TR_M6

M6_MM

For CU5000

M7 / TR_M7

M7_MM

divided into

M8 / TR_M8

M8_MM

2 images each

M9 / TR_M9

M9_MM

M10 / TR_M10

M10_MM

M11 / TR_M11

M11_MM

M12 / TR_M12

M12_MM

IB_MAX

Display menu Corresponding matrix

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 97/106

B4 Display matrices for 3-wire system, balanced load, phase shift

U_MM

I I_MAX

P P_MAX

F F_MM

P P_MAX

Q Q_MAX

S S_MAX

P_TRIANGLE

PF_MIN

Cφ_MIN

I> 1.1 / 1.2

I> 2.1 / 2.2

I> 3.1 / 3.2

I> 4.1 / 4.2

ΣP_I_IV_HT

ΣP_I_IV_NT

ΣP_II_III _NT

ΣP_II_III_HT

ΣQ_I_II_HT

ΣQ_I_II _NT

ΣQ_III_IV _HT

ΣQ_I_II _NT

ΣMETER1

ΣMETER2

ΣMETER3

ΣMETER4

ΣMETER6

ΣMETER7

ΣMETER8

ΣMETER9

ΣMETER10

ΣMETER11

ΣMETER12

MT_P_I_IV

MT_P_II_III

MT_Q_I_II

MT_Q_III_IV

MT_S

M1 / TR_M1

M1_MM

M2 / TR_M2

M2_MM

M3 / TR_M3

M3_MM

M4 / TR_M4

M4_MM

M5 / TR_M5

M5_MM

M6 / TR_M6

M6_MM

For CU5000

M7 / TR_M7

M7_MM

divided into

M8 / TR_M8

M8_MM

2 images each

M9 / TR_M9

M9_MM

M10 / TR_M10

M10_MM

M11 / TR_M11

M11_MM

M12 / TR_M12

M12_MM

IB_MAX

Display menu Corresponding matrix

ΣMETER5

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 98/106

B5 Display matrices for 3-wire systems, unbalanced lo ad

U12

U12_MM

UR1 U23

U23_MM

UR2 U31

U31_MM

UR2R1

F F_MM

UR21_MAX

I1_MAX

IR1

I2_MAX

IR2

I3_MAX

IR2R1

IPE

IPE_MAX

IR21_MAX

P_MAX

Q Q_MAX

S S_MAX

P_TRIANGLE

PF_MIN

Cφ_MIN

I> 1.1 / 1.2

I> 2.1 / 2.2

I> 3.1 / 3.2

I> 4.1 / 4.2

ΣP_I_IV_HT

ΣP_I_IV_NT

ΣP_II_III _NT

ΣP_II_III_HT

ΣQ_I_II_HT

ΣQ_I_II _NT

ΣQ_III_IV _HT

ΣQ_I_II _NT

ΣMETER1

ΣMETER2

ΣMETER3

ΣMETER4

ΣMETER5

ΣMETER6

ΣMETER7

ΣMETER8

ΣMETER10

ΣMETER11

ΣMETER12

MT_P_I_IV

MT_P_II_III

MT_Q_I_II

MT_Q_III_IV

MT_S

M1 / TR_M1

M1_MM

M2 / TR_M2

M2_MM

M3 / TR_M3

M3_MM

M4 / TR_M4

M4_MM

M5 / TR_M5

M5_MM

M6 / TR_M6

M6_MM

For CU5000

M7 / TR_M7

M7_MM

divided into

M8 / TR_M8

M8_MM

2 images each

M9 / TR_M9

M9_MM

M10 / TR_M10

M10_MM

M11 / TR_M11

M11_MM

M12 / TR_M12

M12_MM

IB1

IB1_MAX

IB2

IB2_MAX

IB3

IB3_MAX

Display menu Corresponding matrix

ΣMETER9

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 99/106

B6 Display matrices for 3-wire systems, unbalanced lo ad , Aron

U12

U12_MM

UR1 U23

U23_MM

UR2 U31

U31_MM

UR2R1

F F_MM

UR21_MAX

I1_MAX

I2_MAX

I3_MAX

IMS P

P_MAX

Q Q_MAX

S S_MAX

P_TRIANGLE

PF_MIN

Cφ_MIN

I> 1.1 / 1.2

I> 2.1 / 2.2

I> 3.1 / 3.2

I> 4.1 / 4.2

ΣP_I_IV_HT

ΣP_I_IV_NT

ΣP_II_III _NT

ΣP_II_III_HT

ΣQ_I_II_HT

ΣQ_I_II _NT

ΣQ_III_IV _HT

ΣQ_I_II _NT

ΣMETER1

ΣMETER2

ΣMETER3

ΣMETER4

ΣMETER5

ΣMETER6

ΣMETER7

ΣMETER8

ΣMETER10

ΣMETER11

ΣMETER12

MT_P_I_IV

MT_P_II_III

MT_Q_I_II

MT_Q_III_IV

MT_S

M1 / TR_M1

M1_MM

M2 / TR_M2

M2_MM

M3 / TR_M3

M3_MM

M4 / TR_M4

M4_MM

M5 / TR_M5

M5_MM

M6 / TR_M6

M6_MM

For CU5000

M7 / TR_M7

M7_MM

divided into

M8 / TR_M8

M8_MM

2 images each

M9 / TR_M9

M9_MM

M10 / TR_M10

M10_MM

M11 / TR_M11

M11_MM

M12 / TR_M12

M12_MM

IB1

IB1_MAX

IB2

IB2_MAX

IB3

IB3_MAX

Display menu Corresponding matrix

ΣMETER9

PM 1001606 000 07 Device handbook CENTRAX CU3000-CU5000 100/106

Camille Bauer CENTRAX CU3000, CENTRAX CU5000 Device Handbook

Specifications and Main Features

Frequently Asked Questions

User Manual

1. Introduction

1.1 Purpose of this document

1.2 Scope of supply

1.3 Further documents

2. Safety notes

3. Device overview

3.1 Brief description

3.2 Available measurement data

4. Mechanical mounti ng

4.1 CENTRAX CU3000

4.2 CE NT RAX CU5000

5. Electrical connections

5.1 General safety notes

5.2 Terminal assignments of the I/O extensions

5.2.1 CENTRAX CU3000 Function Option 1 Option 2 Option 3 Option 4

5.2.2 CENTRAX CU5000

5.3 Possible cro ss secti ons and tightening torques

5.4 Inputs

5.5 Power supply

5.6 Relays

5.7 Digital inputs

5.8 Digital outputs

5.9 Analog outputs

5.10 Fault current detection

5.11 Modbus interface RS485

5.12 Uninterruptible power supply (UPS)

5.13 GPS time synchronization

6. Commissioning

6.1 Parametrization of the device functionality

6.2 Operating LED (CU5000 only)

6.3 Installation ch ec k

6.4 Ethernet installation

6.4.1 Settings

6.4.2 Connection of the standard interface

6.4.3 Connection of the IEC61850 interface

6.4.4 MAC addresses

6.4.5 Communication tes ts

6.4.6 Resetting the communication settings of the CU5000

6.5 Protection against device data changing

7. Operating the devic e

7.1 Operating elements

7.2 Selecting the information to display

7.3 Measurement displays and used symbols

7.4 Resetting measurement data

7.5 Configuration

7.5.1 Configuration at the device

7.5.2 Configuration via web browser

7.6 Monitoring fault-currents

7.7 Data recording

Periodical data

7.7.2 Events Displaying of event entries

7.7.3 Disturbance recorder

7.7.4 Micro SD card (CU3000 only)

7.8 Timeouts

8. CODESYS Quick Start

8.1 CODESYS development environment

8.2 CENTRAX device description

8.3 Create a project

8.4 CU3000/CU5000 Device tree

8.5 Selection of the I/O extension modules

8.6 Using the Modbus master functionality

8.7 Creating the CODESYS application

8.7.1 Using remanent variables

8.7.2 Using the data logger

8.8 Creating own visualizations

8.8.1 Adding a visualization to the project

8.8.2 Target visualization (TargetVisu)

8.8.3 WEB visualizations (WebVisu)

8.9 Establishing a connection to the device

8.10 Loading the application to the device

8.11 Loading the application on-site

8.11.1 Creating a boot application

8.11.2 Deleting the active application

8.11.3 Loading the application

8.11.4 Starting the application

8.11.5 Resetting the active application