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MiCOM P632
Startup Criteria
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MiCOM P632
Startup Criteria
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The startup of the circuit breaker failure protection function will occur when the CB is recognized as closed during a start criterion. The following startup criteria are evaluated:
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Internal startup criterion: Generating the specific general trip signal, which has been selected by setting parameter CBF_1: Fct.assign. starting, is considered a startup criterion. In addition it may be selected, by setting the parameter CBF_1: Start with man. trip, that a manual trip signal will also be used as a startup criterion. |
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External startup criterion: Triggering by a protection device operating in parallel (CBF_1: Start 3p EXT) may be used as a startup criterion. To be on the safe side an additional two-pole triggering may be implemented by applying the signal CBF_1: Start enable EXT. |
Once started, the CBF function will only drop out when a successful opening has been detected from the current flow monitoring or, in some cases, when the CB signals that its contacts are open.