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