Check Trip And Autoreclose Cycle - GE MiCOM P40 Technical Manual

P446SV
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CHECK TRIP AND AUTORECLOSE CYCLE

If the auto-reclose function is being used, the circuit breaker trip and auto reclose cycle can be tested
automatically by using the application-specific settings.
To test the trip and close operation without operating the breaker, the following conditions must be satisfied:
● The CB Healthy DDB signal should either not be mapped, or if it is mapped it must be asserted high.
The CB status inputs (52A, etc.) should either not be mapped, or if they are mapped they should be activated
●
to mimic the circuit breaker operation.
Some models can be configured for single-pole tripping. If configured for single pole tripping, either set
●
CT/VT RATIO > VT Connected to No, or apply appropriate voltage signals to prevent the pole dead logic from
converting to 3-pole tripping.
1. To test the first three-phase auto-reclose cycle, set COMMISSION TESTS > Test Autoreclose to Trip 3
Pole. The IED performs a trip/reclose cycle.
2. Repeat this operation to test the subsequent three-phase auto-reclose cycles.
3. Check all output relays (used for such as circuit breaker tripping and closing, or blocking other devices)
operate at the correct times during the trip/close cycle.
Check the auto-reclose cycles for single phase trip conditions one at a time by sequentially setting COMMISSION
TESTS > Test Autoreclose to Trip Pole A, Trip Pole B and Trip Pole C.
P446SV-TM-EN-1
Chapter 24 - Commissioning Instructions
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