What do the breaker status flags on a Masterpact NW indicate?


11 August 2022

Why do the flags on a Masterpact NW indicate Charged and Not-OK when it is charged and open? 

Product Line:
Air Circuit breakers

Breaker flags indicate whether or not the breaker is open or closed, whether the springs are charged or not, and if the breaker will close with a close command.
The flags will indicate charged and OK only if the following conditions are met:
  • Breaker is open and charged
  • Shunt trip (if present) is NOT energized
  • UVR (if present) is energized
  • There is no padlock in place
  • Keylock (if present) is in operable position
  • Other interlocks such as spring-discharge and rod/cable interlocks are satisfied