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8.3.
Protection functions
Current injection procedure:
Adjust the Sverker current injector with HOLD 0.2A , and suddenly, inject it to the relay, as
it would happened in real situation when circuit breaker is close, powering network line.
From this value, increase the current to achieve the function pick-up and the function trip.
8.3.1. Protection functions testing
•
50 instantaneous phase overcurrent protection:
Settings:
-
Function Enable: YES.
-
Current Tap: 1xIn.
-
Time: 2 (sec)
The following information will be checked:
-
Pick-up at 100% of the tap
-
Output 4 is activated
-
LED 2 is activated
•
50N/G instantaneous neutral overcurrent protection:
Settings:
-
Funciton Enable: YES.
-
Current Tap: 1xIn.
-
Time: 2 (sec)
The following information will be checked:
-
Pick-up at 100% of the tap
-
Output 4 is activated
-
LED 3 is activated