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What is the function of the ready-to-close Switch (PF) for the NW or NT breaker?

Issue:
PF switch functionality

Product Line:
Circuit breakers

Resolution:
The ready-to-close position switch (PF) indicates that the following conditions are met and the circuit breaker can be closed:
o The circuit breaker is open.
o The closing springs are charged.
​o All interlocks are satisfied.
o There are no standing closing or opening orders.

Schneider Electric USA

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