Westinghouse Style 37 Vari-Depth Operating Mechanism

The Westinghouse Style 37 Vari-Depth Operating Mechanism is a door-mounted, vari-depth control assembly that provides mechanical breaker actuation and remote actuation for Westinghouse Tri-Pac NB circuit breakers. It supports manual open/close operation and a remote operating handle and linkage to actuate the breaker through varying enclosure depths, enabling reliable switching across different panel configurations. Commonly installed in switchgear assemblies, motor control centers, and electrical distribution panels—a setup favored by system integrators—for dependable circuit isolation and controlled switching in manufacturing facilities, utilities, process automation equipment, and power management systems. The unit is compatible with Tri-Pac NB molded case breakers and Westinghouse Tri-Pac NB breaker systems, making it suitable for replacement maintenance, retrofit projects, and restoration of legacy equipment in industrial power systems. Mounting is door-mounted and panel-operated, aligning with diverse installation environments and ensuring safe, mechanical operation of the breaker.