158 Connect Devices
WAGO-I/O-SYSTEM 750 XTR
750-495/040-00x 3-Phase Power Measurement Module 690 V
Manual
Version 1.2.0
7.7.1
Measurements of U
LL
up to 400 V
RMS
The following subsections describe all connection options of the I/O module in
networks without a neutral conductor for U
LL
≤ 400
V
RMS
.
7.7.1.1 Measurements in Y Networks with Star Points Grounded on the
Source Side
For measurement in 3-phase networks without a neutral conductor, the I/O
module offers 2 connection options:
- 3-wattmeter method (Artificial Star Point – ASP)
- 2-wattmeter method (Aron circuit/Blondel’s Theorem)
7.7.1.1.1 3-Wattmeter Method (Artificial Star Point – ASP)
See section “Measurement of U
LL
over 400 V
RMS
” > “Measurement in Y-Networks
with Star Point Grounded on the Source Side” > “3-Wattmeter Method (Artificial
Star Point – ASP).”