Interlocked contactor assembly

Abstract

The interlocked contactor includes an interlock mechanism which selectively prevents closure of contactor contacts before a preselected number of operations of the contactor. An armature actuator is connected to the armature to cause a slider bar portion of the interlock mechanism to translate between an interlock open and interlock closed position corresponding to the contact open and contact closed positions. The interlock mechanism is generally mounted to a detachable mounting base which is mounted to a contactor frame. The slider bar is positionally maintained before failure of the assembly by a pair of roller carrying studs, one of which is designed to shear before the predetermined number of contactor operations. An arresting base is pivotally mounted for movement about one of the studs providing adjustable alignment with the slider bar. An adjustment shaft determines the degree of clearance between an interlock tab on the arresting base and an arresting notch on the slider bar. The armature actuator rides within a translating notch of the slider bar. When both studs are in an unfailed condition, they cause the slider bar to only translate as a result of the movement of the armature actuator. On failure of one of the studs, the slider bar both rotates and translates causing the arresting notch to receive the interlock tab when the contactor attempts to close.