Abstract: A door interlock assembly is for a draw-out circuit breaker assembly. A draw-out circuit breaker is housed within an enclosure including a door and includes a poleshaft operable between first and second positions corresponding to separable contacts being opened and closed, respectively. The door interlock assembly includes a pivot member coupled to the poleshaft and a door latch interconnected to the pivot member by a linkage, such as a threaded drive rod. The door latch pivots such that a first end thereof engages and locks the door of the enclosure when the poleshaft moves to the second position. An optional mechanical sensor assembly adapted to trip the circuit breaker when the door is positioned in any position other than closed, is also disclosed.

Abstract: A locking assembly is for the trip bar of a circuit breaker. A pivotal trip lever is coupled to the trip bar, in order to move therewith. The locking assembly includes: a locking mechanism, such as a commercially available key lock, with a pivotal element; a mounting plate, which receives the key lock and secures it to the circuit breaker; an extension member coupled to the pivotal element; and a flexible linkage interconnecting the pivotal trip lever and the extension member. The key lock has locked and unlocked positions corresponding to the trip bar of the circuit breaker being locked and unlocked, respectively. The flexible linkage is interchangeable or universally employable with a variety of commercially available locks, in order to lock the trip component of a wide variety of electrical switching apparatus.