Technical FAQs

Ask a Question

what is the main function for PF ( ready to close contact) in ACB Masterpact NT/NW ?

The “ready to close” position of the circuit breaker is indicated by a mechanical indicator
and a PF changeover contact. This signal indicates that all the following are valid:
  •  the circuit breaker is in the OFF position
  •  the spring mechanism is charged
  •  a maintained opening order is not present:
  •  MX energised
  • v fault trip
  • v remote tripping second MX or MN
  •  device not completely racked in
  • device locked in OFF position
  • device interlocked with a second device.
Was this helpful?
What can we do to improve the information ?