Mechanical Interlocks

Interlock	Function of interlock
Between truck and low voltage connector	The truck cannot be actuated, unless the low voltage plug is inserted.
Between truck and low voltage connector	The low voltage plug cannot be removed, when the truck is not in disconnected/test position.
Between circuit breaker and truck	Circuit breaker cannot be racked in or out while it is switched ON.
Between circuit breaker and truck	Circuit breaker cannot be switched ON, unless the truck is completely in its test or in-service position. CB can be ON/OFF in test / service position.
Between truck and cubicle	If the truck front frame is not locked in the cubicle, the truck cannot be actuated.
Between truck and cubicle	If the truck has left its test position, the truck front frame cannot be unlocked in the cubicle.
Between truck and front door	If the front door is opened, the truck cannot be moved into the service position.
Between truck and front door	Door cannot be opened, if the truck has left its test position.