EDR-3000 IM02602003E
Commissioning: Trip Circuit Monitoring for Breakers
For breakers that trip by means of little energy (e.g.: via an optocoupler), it has
to be ensured that the current applied by the digital inputs will not cause false
tripping of the breaker.
Object to Be Tested:
Test of the trip circuit monitoring (with 52a and 52b contact).
Procedure, Part 1:
Simulate failure of the control voltage in the power circuits.
Successful Test Result, Part 1:
After expiration of
»t-TCM«
the
trip circuit supervision,
TCM
of the device should signal an alarm.
Procedure, Part 2:
Simulate a broken cable in the breaker control circuit.
Successful Test Result, Part 2:
After expiration of
»t-TCM«,
the
trip circuit supervision
TCM
of the device should signal an alarm.
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