122 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 29: Connection Schematic for Ungrounded 3-Phase Network with Neutral Conductor for
Power Measurement with the 3-Wattmeter Method for U
LN
*
≤
346 V
RMS
and
U
LL
≤
600 V
RMS
Table 36: Legend for Figure “Connection Schematic for Ungrounded 3-Phase Network with Neutral
Conductor for Power Measurement with the 3-Wattmeter Method for U
LN
*
≤
346 V
RMS
and
U
LL
≤
600 V
RMS
”
No. Explanation
1 Generator:
Generator or transformer in Y connection, without grounding
2 Loads with impedances (Zx):
- Load connection: in Y connection
- Load type: symmetrical (I
N
= 0) or asymmetrical (I
N
≠ 0)
3 Current transformer (CT4) for current measurement in the neutral
conductor (optionally; for the measurement the topology “4-Wire Wye”
(“4-W”) must be selected)
4
Connection terminal N:
Reference potential for all voltage inputs and differential current inputs