OMNIGRID Connect
Kamstrup A/S · 5512-2065_A1_GB_BSI
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8.2
Power Analyzer (PA) IME Nemo D4-Le
Figure 20: IME Nemo D4-Le
8.2.1
Earth fault detection for IT-net
Detection of earth fault in IT-net is realized using PA measuring UL1N, UL2N and UL3N. Earth fault
is present if phase-earth voltage deviates by more than +/- 40V from the nominal 130V
For the OMNIGRID Connect implementation, the sampling rate for voltage measurements is 1 Hz.
OMNIGRID Connect
RS-485
MODBUS
Figure 21: Earth fault voltage measurement in TT-net using OMNIGRID Connect.