166 Connect Devices
WAGO-I/O-SYSTEM 750 XTR
750-495/040-00x 3-Phase Power Measurement Module 690 V
Manual
Version 1.2.0
Figure 42: Connection Schematic for Ungrounded 3-Phase Network without Neutral Conductor for
Power Measurement with the 2-Wattmeter Method for U
LL
≤
400 V
RMS
and u
LL
≤
400 V
RMS
Table 49: Legend for the Figure “Connection Schematic for Ungrounded 3-Phase Network without
Neutral Conductor for Power Measurement with the 2-Wattmeter Method for U
LL
≤
400 V
RMS
and u
LL
≤
400 V
RMS
”
No. Explanation
1 Generator:
Generator or transformer in Y connection, without grounding or with defined
ground impedance (ZE)
2 Generator:
Generator or transformer in
∆
connection, without grounding
3 Loads with impedances (Zx):
- Load connection: in
∆
connection
- Load type: symmetrical or asymmetrical
4 Loads with impedances (Zx):
- Load connection: in Y connection
- Load type: symmetrical or asymmetrical
Note that an asymmetrical load leads to a star point shift in the load.
5 Connection terminal N:
Reference potential for all voltage inputs and differential current inputs