Measurement Of Uln; Measurement In Grounded 3-Phase Networks With Neutral Conductor - WAGO 750-495/040-00 Series Manual

WAGO-I/O-SYSTEM 750 XTR
750-495/040-00x 3-Phase Power Measurement Module 690 V
7.6.2 Measurement of U
The following subsections describe all connection options of the I/O module in
networks with a neutral conductor for U
Always use voltage transformers with reinforced insulation
It is essential to use voltage transformers (VTs) with reinforced insulation to
measure voltages above the nominal input voltage of the I/O module (U
Furthermore, the N connection on the module side must be grounded.
Otherwise, touch-proof protection from the system may no longer be given in the
event of a fault. This can cause electric shock or burns.
7.6.2.1

Measurement in Grounded 3-Phase Networks with Neutral Conductor

For measurement in grounded 3-phase networks with a neutral conductor, the
I/O module offers 2 connection options:
• Voltage measurement on 3 line conductors
• Voltage measurement on 2 line conductors
over 400 V
LN RMS
> 400 V
LN
Connect Devices 131
.
RMS
Version 1.2.0
/U ).
LN LL
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