CUR R E N T S EN S ORS PR IM AR Y T E ST ING
28 1VLG5 000 17 C
Step 6/7
Check current metering for the phase and measured current in other phases on the protec-
tion relay LHMI Measurements view.
Current must be zero in phases which are not under the primary injection test.
Figure 40: Measurements view
“Io-A” in Measurements view is a measured value, not a calculated one.
Step 7/7
After testing of all 3 phases, install the back-overpressure relief flap. Set up the Ith limiter and
verify its function in the switchgear panel.
Protection functions trip the signal block Tripping coil supervision function.
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