WAGO 3-Phase Power Measurement User manual

Brand: WAGO

Model: 3-Phase Power Measurement

Category: Measuring, testing & control

Type: User manual

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Manual

WAGO I/O System 750 XTR

750-495/040-010

-Phase POM 20KV 300A XTR

-Phase Power Measurement; 20 kV AC; 300 A;

Extreme

(* only in connection with sensors according to section “Measurement of

Voltage, Current and Power”)

Version 1.0.0

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2 WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

WAGO Kontakttechnik GmbH & Co. KG

Hansastraße 27

D-32423 Minden

Phone: +49 (0) 571/8 87 – 0

Fax: +49 (0) 571/8 87 – 1 69

E-Mail: [email protected]

Web: www.wago.com

Technical Support

Phone: +49 (0) 571/8 87 – 4 45 55

Fax: +49 (0) 571/8 87 – 84 45 55

E-Mail: [email protected]

Every conceivable measure has been taken to ensure the accuracy and

completeness of this documentation. However, as errors can never be fully

excluded, we always appreciate any information or suggestions for improving the

documentation.

E-Mail: [email protected]

We wish to point out that the software and hardware terms as well as the

trademarks of companies used and/or mentioned in the present manual are

generally protected by trademark or patent.

WAGO is a registered trademark of WAGO Verwaltungsgesellschaft mbH.

=== Ende der Liste für Textmarke Einband_vorne ===

WAGO I/O System 750 XTR Table of Contents 3

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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Table of Contents

1 Notes about this Documentation .............................................................. 6

1.1 Validity of this Documentation .................................................................. 6

1.2 Revision History ....................................................................................... 7

1.3 Copyright.................................................................................................. 7

1.4 Symbols ................................................................................................... 8

1.5 Number Notation ...................................................................................... 9

1.6 Font Conventions ..................................................................................... 9

2 Important Notes ........................................................................................ 10

2.1 Legal Bases ........................................................................................... 10

2.1.1 Subject to Changes ........................................................................... 10

2.1.2 Personnel Qualifications.................................................................... 10

2.1.3 Use of the 750 Series in Compliance with Underlying Provisions ..... 10

2.1.4 Technical Condition of Specified Devices ......................................... 11

2.1.4.1 Disposal ........................................................................................ 11

2.1.4.1.1 Electrical and Electronic Equipment ........................................ 11

2.1.4.1.2 Packaging ................................................................................ 12

2.2 Safety Advice (Precautions) ................................................................... 13

3 Device Description ................................................................................... 16

3.1 View ....................................................................................................... 18

3.2 Connectors ............................................................................................. 19

3.2.1 Data Contacts/Local Bus ................................................................... 19

3.2.2 Power Jumper Contacts/Field Supply ............................................... 19

3.2.3 CAGE CLAMP

Connectors .............................................................. 20

3.3 Display Elements ................................................................................... 21

3.4 Operating Elements ............................................................................... 22

3.5 Schematic Diagram ................................................................................ 22

3.6 Technical Data ....................................................................................... 24

3.6.1 Device Data ....................................................................................... 24

3.6.2 Power Supply .................................................................................... 24

3.6.3 Measurement Inputs.......................................................................... 25

3.6.4 Measured Values .............................................................................. 26

3.6.5 Measurement Accuracy..................................................................... 28

3.6.6 Communication ................................................................................. 28

3.6.7 Connection Technology..................................................................... 28

3.6.8 Mechanical Conditions ...................................................................... 29

3.6.9 Climatic Environmental Conditions .................................................... 29

3.7 Approvals ............................................................................................... 30

3.8 Standards and Guidelines ...................................................................... 31

4 Function Description ................................................................................ 35

4.1 Measurement Principle .......................................................................... 35

4.2 Measured Value Overview ..................................................................... 35

4.3 Description of the Measured Values ...................................................... 37

4.4 Measurement Errors .............................................................................. 43

5 Process Image .......................................................................................... 46

4 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

5.1 Overview of the Process Data ............................................................... 47

5.2 Output Data............................................................................................ 48

5.2.1 Definition of the Control Words ......................................................... 48

5.2.2 Definition of the Output Data Words .................................................. 49

5.3 Input Data .............................................................................................. 50

5.3.1 Definition of the Status Words ........................................................... 50

5.3.2 Definition of the Input Data Words .................................................... 55

5.4 Descriptions for the Process Image ....................................................... 59

5.4.1 AC Measured Value Collection (010) ................................................ 60

5.4.2 Harmonic Analysis Collections (020, 021, 022) ................................. 61

5.4.3 Transient Reaction Measured Values ............................................... 63

5.5 Measured Value Collections .................................................................. 64

5.5.1 Collection 010 – AC Measured Values .............................................. 64

5.5.2 Collections 020, 021 and 022 – Harmonic Analysis .......................... 68

5.6 Examples of the Calculation of the Measured Values from the

Process Values ...................................................................................... 69

6 Mounting ................................................................................................... 71

6.1 Mounting Sequence ............................................................................... 72

6.2 Inserting and Removing Devices ........................................................... 73

6.2.1 Inserting the I/O Module .................................................................... 73

6.2.2 Removing the I/O Module.................................................................. 74

7 Connect Devices ....................................................................................... 75

7.1 Protection against Hazardous Touch Voltages ...................................... 75

7.2 Shielding ................................................................................................ 76

7.2.1 General ............................................................................................. 76

7.2.2 Fieldbus Cables................................................................................. 76

7.2.3 Shielded Signal Lines ........................................................................ 77

7.3 Connecting a Conductor to the CAGE CLAMP

.................................... 78

7.4 Measurement of Voltage, Current and Power ........................................ 79

8 Commissioning ......................................................................................... 81

8.1 General .................................................................................................. 81

8.1.1 Software Interface ............................................................................. 82

8.1.2 “Start” Ribbon .................................................................................... 84

8.1.3 “Measured Value Views” Menu ......................................................... 84

8.1.4 Status Bar ......................................................................................... 85

8.1.5 “Settings” Dialog ................................................................................ 86

8.1.6 Setting Measurement Units ............................................................... 88

8.2 Settings and Measured Values .............................................................. 89

8.2.1 “I/O Module” Tab ............................................................................... 89

8.2.2 Tabs “Phase L1,” “Phase L2” and “Phase L3” ................................... 91

8.2.3 “Energy” Tab ..................................................................................... 92

8.2.4 “Factory Settings” Tab ....................................................................... 94

8.2.5 Displaying the Measured Values with WAGO-I/O-CHECK ............... 96

8.2.5.1 “Overview” View ........................................................................... 96

8.2.5.2 “Current/Voltages” View ............................................................... 98

8.2.5.3 “Powers” View .............................................................................. 99

8.2.5.4 “Energies” View .......................................................................... 100

8.2.5.5 “Upper Harmonics” View ............................................................ 101

WAGO I/O System 750 XTR Table of Contents 5

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

8.2.5.6 “Measurement Recording” View ................................................. 103

8.2.5.7 “Information” View ...................................................................... 104

9 Firmware Update .................................................................................... 105

10 Appendix ................................................................................................. 106

10.1 Examples of CSV Files ........................................................................ 106

10.1.1 Snapshot ......................................................................................... 106

10.1.2 Measurement Recording ................................................................. 111

10.2 Factory Settings ................................................................................... 112

10.3 Register Assignment ............................................................................ 114

10.4 Parameter Assignment ........................................................................ 121

List of Figures .................................................................................................. 126

List of Tables .................................................................................................... 127

=== Ende der Liste für Textmarke Verzeichnis_ vorne ===

6 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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1 Notes about this Documentation

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Always retain this documentation!

This documentation is part of the product. Therefore, retain the documentation

during the entire service life of the product. Pass on the documentation to any

subsequent user. In addition, ensure that any supplement to this documentation

is included, if necessary.

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1.1 Validity of this Documentation

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This documentation is only applicable to the I/O module 750-495/040-010

(3-Phase POM 20KV 300A XTR).

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The I/O module 750-495/040-010 shall only be installed and operated according

to the instructions in this manual, in the system description for the WAGO I/O

System 750 XTR and in the manual for the used fieldbus coupler/controller.

Consider power layout of the WAGO I/O System 750 XTR!

In addition to these operating instructions, you will also need the system

description “Design Notes XTR – Guidelines and Recommendations for

Increasing Operational Safety” and the manual for the used fieldbus

coupler/controller, which can be downloaded at www.wago.com

. There, you can

obtain important information including information on electrical isolation, system

power and supply specifications.

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WAGO I/O System 750 XTR Table of Contents 7

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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1.2 Revision History

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Table 1: Revision History

Document

Version

Device Version

Change

Hardware

Firmware

1.0.0

01 and

above

Initial publication

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1.3 Copyright

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This Manual, including all figures and illustrations, is copyright-protected. Any

further use of this Manual by third parties that violate pertinent copyright

provisions is prohibited. Reproduction, translation, electronic and phototechnical

filing/archiving (e.g., photocopying) as well as any amendments require the

written consent of WAGO Kontakttechnik GmbH & Co. KG, Minden, Germany.

Non-observance will involve the right to assert damage claims.

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8 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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1.4 Symbols

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Personal Injury!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will

result in death or serious injury.

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Personal Injury Caused by Electric Current!

Indicates a high-risk, imminently hazardous situation which, if not avoided, will

result in death or serious injury.

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Personal Injury!

Indicates a moderate-risk, potentially hazardous situation which, if not avoided,

could result in death or serious injury.

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Personal Injury!

Indicates a low-risk, potentially hazardous situation which, if not avoided, may

result in minor or moderate injury.

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Damage to Property!

Indicates a potentially hazardous situation which, if not avoided, may result in

damage to property.

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Damage to Property Caused by Electrostatic Discharge (ESD)!

Indicates a potentially hazardous situation which, if not avoided, may result in

damage to property.

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Important Note!

Indicates a potential malfunction which, if not avoided, however, will not result in

damage to property.

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WAGO I/O System 750 XTR Table of Contents 9

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

Additional Information:

Refers to additional information which is not an integral part of this

documentation (e.g., the Internet).

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1.5 Number Notation

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Table 2: Number Notation

Number Code

Example

Note

Decimal

100

Normal notation

Hexadecimal

0x64

C notation

Binary

'100'

'0110.0100'

In quotation marks, nibble separated

with dots (.)

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1.6 Font Conventions

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Table 3: Font Conventions

Font Type

Indicates

italic

Names of paths and data files are marked in italic-type.

e.g.: C:\Program Files\WAGO Software

Menu items are marked in bold letters.

e.g.: Save

A greater-than sign between two names means the selection of a

menu item from a menu.

e.g.: File > New

Input

Designation of input or optional fields are marked in bold letters,

e.g.:

Start of measurement range

“Value”

Input or selective values are marked in inverted commas.

e.g.: Enter the value “4 mA” under Start of measurement range.

[Button]

Pushbuttons in dialog boxes are marked with bold letters in square

brackets.

e.g.: [Input]

[Key]

Keys are marked with bold letters in square brackets.

e.g.:

[F5]

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10 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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2 Important Notes

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This section includes an overall summary of the most important safety

requirements and notes that are mentioned in each individual section. To protect

your health and prevent damage to devices as well, it is imperative to read and

carefully follow the safety guidelines.

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2.1 Legal Bases

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2.1.1 Subject to Changes

WAGO Kontakttechnik GmbH & Co. KG reserves the right to provide for any

alterations or modifications. WAGO Kontakttechnik GmbH & Co. KG owns all

rights arising from the granting of patents or from the legal protection of utility

patents. Third-party products are always mentioned without any reference to

patent rights. Thus, the existence of such rights cannot be excluded.

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2.1.2 Personnel Qualifications

All sequences implemented on WAGO I/O System 750 devices may only be

carried out by electrical specialists with sufficient knowledge. The specialists

must be familiar with the current norms and guidelines for the devices and

environments.

All changes to the coupler or controller should always be carried out by qualified

personnel with sufficient skills in PLC programming.

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2.1.3 Use of the 750 Series in Compliance with Underlying

Provisions

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Fieldbus couplers, controllers and I/O modules found in the modular WAGO I/O

System 750 receive digital and analog signals from sensors and transmit them to

actuators or higher-level control systems. Using controllers, the signals can also

be (pre-) processed.

The devices have been developed for use in an environment that meets the IP20

protection class criteria. Protection against finger injury and solid impurities up to

12.5 mm diameter is assured; protection against water damage is not ensured.

Unless otherwise specified, operation of the devices in wet and dusty

environments is prohibited.

Operating the WAGO I/O System 750 devices in home applications without

further measures is only permitted if they meet the emission limits (emissions of

interference) according to EN 61000-6-3. You will find the relevant information in

the section “Device Description” > “Standards and Guidelines” in the manual for

the used device.

WAGO I/O System 750 XTR Table of Contents 11

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

Appropriate housing (per 2014/34/EU) is required when operating the WAGO I/O

System 750 in hazardous environments. Please observe the installation

regulations! Please note that a prototype test certificate must be obtained that

confirms the correct installation of the system in a housing or switch cabinet.

The implementation of safety functions such as EMERGENCY STOP or safety

door monitoring must only be performed by the F I/O modules within the modular

WAGO I/O System 750. Only these safe F I/O modules ensure functional safety

in accordance with the latest international standards. WAGO's interference-free

output modules can be controlled by the safety function.

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2.1.4 Technical Condition of Specified Devices

The devices to be supplied ex works are equipped with hardware and software

configurations, which meet the individual application requirements. These

modules contain no parts that can be serviced or repaired by the user. The

following actions will result in the exclusion of liability on the part of WAGO

Kontakttechnik GmbH & Co. KG:

• Repairs,

• Changes to the hardware or software that are not described in the

operating instructions,

• Improper use of the components.

Further details are given in the contractual agreements. Please send your

request for modified and new hardware or software configurations directly to

WAGO Kontakttechnik GmbH & Co. KG.

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2.1.4.1 Disposal

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2.1.4.1.1 Electrical and Electronic Equipment

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Electrical and electronic equipment may not be disposed of

with household waste. This also applies to products without

this symbol.

Electrical and electronic equipment contain materials and substances that can be

harmful to the environment and health. Electrical and electronic equipment must

be disposed of properly after use.

WEEE 2012/19/EU applies throughout Europe. Directives and laws may vary

nationally.

12 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

Environmentally friendly disposal benefits health and protects

the environment from harmful substances in electrical and

electronic equipment.

• Observe national and local regulations for the disposal of electrical and

electronic equipment.

• Clear any data stored on the electrical and electronic equipment.

• Remove any added battery or memory card in the electrical and

electronic equipment.

• Have the electrical and electronic equipment sent to your local

collection point.

Improper disposal of electrical and electronic equipment can be harmful to the

environment and human health.

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2.1.4.1.2 Packaging

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Packaging contains materials that can be reused.

PPWD 94/62/EU and 2004/12/EU packaging guidelines apply throughout

Europe. Directives and laws may vary nationally.

Environmentally friendly disposal of the packaging protects the environment and

allows sustainable and efficient use of resources.

• Observe national and local regulations for the disposal of packaging.

• Dispose of packaging of all types that allows a high level of recovery,

reuse and recycling.

Improper disposal of packaging can be harmful to the environment and wastes

valuable resources.

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WAGO I/O System 750 XTR Table of Contents 13

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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2.2 Safety Advice (Precautions)

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For installing and operating purposes of the relevant device to your system the

following safety precautions shall be observed:

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Installation and maintenance only by trained specialist personnel

The I/O module must only be installed and maintained by trained specialist

personnel in the medium voltage range.

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Use only standards-compliant sensors, and pay attention to the technical

data

Use only voltage sensors approved per IEC 60044-7 (new version: IEC 61869-7)

and current sensors per IEC 60044-8 (new version: IEC 61869-8), and do so in

accordance with the information in the section “Technical Data.”

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Install protection against electric shock!

All wiring for the measurement system shall be provided with protection against

shock hazard voltages along with the corresponding safety signs!

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Do not work on devices while energized!

All power sources to the device shall be switched off prior to performing any

installation, repair or maintenance work.

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Install device in only one suitable enclosure!

The device is an open system. Install the device in a suitable enclosure. This

enclosure must:

• Guarantee that the max. permissible degree of pollution is not exceeded.

• Offer adequate protection against contact.

• Prevent fire from spreading outside of the enclosure.

• Offer adequate protection against UV irradiation.

• Guarantee mechanical stability

• Restrict access to authorized personnel and may only be opened with tools

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14 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

Ensure disconnect and overcurrent protection!

The device is intended for installation in automation technology systems.

Disconnect protection is not integrated. Connected systems must be protected by

a fuse.

Provide suitable disconnect and overcurrent protection on the system side!

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Ensure a standard connection!

To minimize any hazardous situations resulting in personal injury or to avoid

failures in your system, the data and power supply lines shall be installed

according to standards, with careful attention given to ensuring the correct

terminal assignment. Always adhere to the EMC directives applicable to your

application.

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Only connect or disconnect lines when power is safely isolated

Hazardous voltages and currents are present on the primary side of the sensors

used. Contact with the lines when they are live can result in severe injury or

death. Therefore, read and observe the following safety rules before you perform

work on the device:

1. Disconnect the respective system component from the power supply.

2. Secure the system component against unintentional restart.

3. Verify that the voltage is actually isolated.

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Do not touch hot surfaces!

The surface of the housing can become hot during operation. If the device was

operated at high ambient temperatures, allow it to cool off before touching it.

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Ensure proper contact with the DIN-rail!

Proper electrical contact between the DIN-rail and device is necessary to

maintain the EMC characteristics and function of the device.

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WAGO I/O System 750 XTR Table of Contents 15

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

Replace defective or damaged devices!

Replace defective or damaged device/module (e.g., in the event of deformed

contacts).

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Protect the components against materials having seeping and insulating

properties!

The components are not resistant to materials having seeping and insulating

properties such as: aerosols, silicones and triglycerides (found in some hand

creams). If you cannot exclude that such materials will appear in the component

environment, then install the components in an enclosure being resistant to the

above-mentioned materials. Clean tools and materials are imperative for

handling devices/modules.

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Clean only with permitted materials!

Clean housing and soiled contacts with propanol.

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Do not use any contact spray!

Do not use any contact spray. The spray may impair contact area functionality in

connection with contamination.

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Do not reverse the polarity of connection lines!

Avoid reverse polarity of data and power supply lines, as this may damage the

devices involved.

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Avoid electrostatic discharge!

The devices are equipped with electronic components that may be destroyed by

electrostatic discharge when touched. Please observe the safety precautions

against electrostatic discharge per DIN EN 61340-5-1/-3. When handling the

devices, please ensure that environmental factors (personnel, work space and

packaging) are properly grounded.

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16 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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3 Device Description

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The 750-495/040-010 3-Phase Power Measurement Module (also referred to by

the short name “I/O module”) allows measurement of electrical data in a 3-phase

supply network in the medium voltage range up to 20 kV

RMS

by means of voltage

sensors per IEC 60044-7 (new version: IEC 61869-7) and current sensors per

IEC 60044-8 (new version: IEC 61869-8). Observe the information in chapter

“Technical Data”.

The I/O module measures nominal voltages up to U

= 20 kV

RMS

11.547 kV

RMS

) and line-to-line nominal currents up to 300 A

RMS

. It provides a large

number of measured variables, allowing comprehensive analysis of the 3-phase

network. These measured values allow operators optimized control of their

equipment, protecting the system against damage and failure.

The measured values provided by the I/O module indicate the load type

(inductive or capacitive) and whether it is an energy consumer or producer, for

example. This allows visualization as a 4-quadrant display, as has been

implemented in the display of the measured values in WAGO-I/O-CHECK,

among other things.

The measured values provided are described in the following sections.

The voltages of the 3 phases are connected via voltage sensors to CAGE

CLAMP® connections L1, L2, L3 and N, and the currents are connected via

current sensors to CAGE CLAMP® connections I1, I2, I3 and N. On the basis of

these input signals, the I/O module determines the various AC measured

quantities, such as voltage and current, reactive, apparent and active power,

energy consumption, power factor, phase angle and frequency. Harmonic

analysis (current/voltage) is also possible for a selectable phase up to the

41st harmonic. The measured quantities are available in the process image,

without requiring high processing power from the controller.

Use only standards-compliant sensors, and pay attention to the technical

data

Use only voltage sensors approved per IEC 60044-7 (new version: IEC 61869-7)

and current sensors per IEC 60044-8 (new version: IEC 61869-8), and do so in

accordance with the information in the section “Technical Data.”

I/O module not suitable for billing purposes

Regardless of the accuracy class of the current and voltage sensors used, the

I/O module is not approved as a meter for billing purposes in the sense of the

electricity metering standard (DIN 43856).

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WAGO I/O System 750 XTR Table of Contents 17

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

Use a power supply module!

Use a power supply module for field-side power supply of downstream I/O

modules.

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Mixed operation

Mixed operation (standard/XTR modules) within a node is possible when groups

of modules are electrically isolated on the field side (i.e., electrically isolated

power supply).

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The I/O module can be operated with all fieldbus couplers/controllers of the

WAGO-I/O-SYSTEM 750 XTR.

Observe the instruction for mixed operation when used in mixed operation behind

standard fieldbus couplers/controllers.

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18 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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3.1 View

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Figure 1: View 750-495/040-010

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Table 4: Legend for Figure “View”

Pos.

Description

Details See Section

Marking possibility with Mini-

WSB

---

Status LEDs

“Device Description” > “Display Elements”

Data contacts

“Device Description” > “Connectors”

CAGE CLAMP

connectors

“Device Description” > “Connectors”

Release tab

“Mounting” > ”Inserting and Removing

Devices”

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WAGO I/O System 750 XTR Table of Contents 19

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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3.2 Connectors

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3.2.1 Data Contacts/Local Bus

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Communication between the fieldbus coupler/controller and the I/O modules as

well as the system supply of the I/O modules is carried out via the local bus. The

contacting for the local bus consists of 6 data contacts, which are available as

self-cleaning gold spring contacts.

Figure 2: Data Contacts

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Do not place the I/O modules on the gold spring contacts!

Do not place the I/O modules on the gold spring contacts in order to avoid soiling

or scratching!

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Pay attention to potential equalization from the environment!

The devices are equipped with electronic components that may be destroyed by

electrostatic discharge. When handling the devices, please ensure that

environmental factors (personnel, work space and packaging) are properly

equalized. Do not touch any conducting parts, e.g., data contacts.

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3.2.2 Power Jumper Contacts/Field Supply

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The I/O module 750-495/040-010 has no power jumper contacts.

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Use a power supply module!

Use a power supply module for field-side power supply of downstream I/O

modules.

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20 Table of Contents WAGO I/O System 750 XTR

750-495/040-010 3-Phase POM 20KV 300A XTR

Manual

Version 1.0.0

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3.2.3 CAGE CLAMP

Connectors

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Twelve CAGE CLAMP

connections allow the three voltage sensors and three

current sensors to be connected, each with a two-wire connection; see also

section “Connecting Devices.”

All N connections are connected internally to each other and are used for the

reference potential N. Therefore, all sensors use the same reference potential.

Figure 3: CAGE CLAMP

Connections of 750-495/040-010

Table 5: Legend for Figure “CAGE CLAMP

Connections of 750-495/040-010”

Measureme

nt Channel