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4.2.3
4.3
94
Breaker failure protection (BFP)
Checking the retrip function without current check
Procedure
1.
Set RetripType = No I> check.
2.
Apply the fault condition with current below the set value.
3.
Verify that retrip is achieved after t1.
4.
Apply the fault condition with current over the set value.
5.
Verify that back-up trip is achieved after t2.
Completing the test
Continue to test another function or complete the test by setting the test mode to off. Restore
connections and settings to the original values, if they were changed for testing purpose.
Chapter 13
Verifying settings by secondary
injection
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