13 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.
T
o 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.
P54A/B/C/E Chapter 20 - Commissioning Instructions
P54xMED-TM-EN-1 481
To Next Page
Loading...
Need help?
General
