7.6.2.1.1 Voltage Measurement On 3 Line Conductors - WAGO 750-495/040-00 Series Manual

132 Connect Devices

7.6.2.1.1 Voltage Measurement on 3 Line Conductors

The "4-Wire Wye" ("4-W") topology is available in WAGO-I/O-Check for voltage
measurement.
This topology is fixed in firmware versions 04 and below and selectable in
WAGO-I/O-Check in firmware versions 05 and above.
The voltage transformer ratio can be parameterized in firmware versions 05 and
above and WAGO-I/O-Check versions IO-3.18.1 (CS0609) and above.
This measurement circuit is used in all grounded 3-phase networks with a neutral
conductor.
Voltage measurement is performed via voltage transformers (VTs). Voltages u
u and u
L2 L3
internally from the measurement results.
The current measurement is performed via current transformers (CTs) or
Rogowski Coils.
The voltage transformer ratio and current transformer ratio must be taken into
account for the correct calculation of all values in the process image.
The nominal input voltage is:
- u = 200 V
LN
Voltage" setting
- u = 400 V
LN
Voltage" setting
Parameter 47 is used for the setting.
Manual
Version 1.2.0
750-495/040-00x 3-Phase Power Measurement Module 690 V
are measured. The I/O module calculates voltages U
if a voltage ≤ 120 V
RMS
if a voltage > 120 V
RMS
WAGO-I/O-SYSTEM 750 XTR
is parameterized for the "Secondary
RMS
is parameterized for the "Secondary
RMS
,
L1
, U and U
L1 L2 L3