Allen-Bradley - 450a Contactor 7.2kv Cpt Fuse - 1502-VC4DCDB-0

The mechanically latched contactor with electrical and mechanical release. Optimized for IntelliVAC control. The mechanically latched contactor operates in much the same way as the electrically held with only a few exceptions. When the control circuit is energized, the current creates an electromagnet in the closing coil. The electromagnet pulls the armature plate towards the coils core, rotating the shaft and causing the actuator plate to move upwards. As the actuator plate moves, it pushes the insulator and movable shaft up, closing the contacts in the vacuum bottle. Once the contactor is closed, a spring-loaded mechanism moves a roller against the armature plate to hold it against the electromagnetic core. The control circuit economizing auxiliary contact, on the left side of the contactor, changes from the normally closed state to the normally open state as the contactor closes. This de-energizes the relay that controls the closing coils.