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Table of Contents
WAGO-I/O-SYSTEM 750 XTR
750-495/040-00x 3-Phase Power Measurement Module 690 V
Manual
Version 1.2.0
3-Wattmeter Method (Artificial Star Point – ASP) ............................. 58
Harmonic Analysis ........................................................................... 58
Overview of the Process Data .............................................................. 60
Definition of the Control Words ........................................................ 61
Definition of the Output Words ......................................................... 62
Definition of the Status Words .......................................................... 63
Definition of the Input Data Words.................................................... 68
Descriptions for the Process Image ...................................................... 72
AC Measured Value Collection (010) ............................................... 73
Harmonic Analysis Collections (020, 021, 022) ................................ 74
Transient Reaction Measured Values .............................................. 76
Measured Value Collections ................................................................. 77
Collection 010 – AC Measured Values ............................................. 77
Collections 020, 021 and 022 – Harmonic Analysis .......................... 81
Examples of the Calculation of the Measured Values from the
Mounting Sequence .............................................................................. 87
Inserting and Removing Devices .......................................................... 88
Inserting the I/O Module ................................................................... 89
Removing the I/O Module ................................................................ 90
Protection against Hazardous Touch Voltages ..................................... 91
Fieldbus Cables ............................................................................... 93
Shielded Signal Lines....................................................................... 94
WAGO Shield Connecting System ................................................... 94
Connecting a Conductor to the CAGE CLAMP
................................... 95
Current Measurement ........................................................................... 96
Current Transformers ....................................................................... 96
Accuracy ..................................................................................... 97
Current Types .............................................................................. 97
Overcurrent Limiting Factor FS .................................................... 98
Rogowski Coils ................................................................................ 99
Current Measurement on a Load ................................................... 100
Voltage Measurement ........................................................................ 101
Power Measurement with 4-Wire Connection on Y Networks ............. 103
............................................... 105
Measurement in Grounded 3-Phase Networks with Neutral
Conductor .................................................................................. 105
Voltage Measurement on 3 Line Conductors ........................ 106
Voltage Measurement on 2 Line Conductors ........................ 108
Measurement in Grounded Single-Phase Networks .................. 110