Westinghouse Electric Corporation PB3800T Trip Unit

Westinghouse Electric Corporation PB3800T Trip Unit is an 800 AMP Type PB trip unit, identified by part number 371D385G07, and designed to function as the protective-control module within PB-series circuit breakers. As the core trip component, it monitors electrical current and coordinates with the breaker mechanism to initiate tripping when specified overcurrent conditions are reached, helping to isolate faults and protect both equipment and personnel, in line with industry practices for protecting personnel and equipment across industrial, commercial, and utility facilities. The PB3800T designation denotes compatibility with the PB family of protection devices, and the 800 AMP rating defines the upper working current at which trip action is expected, aligning with standard practice for high-current distribution applications. With Westinghouse and Cutler-Hammer branding reflected in the model information, this trip unit carries traceability for installation, service, and replacement within legacy PB-series installations, supporting procurement, inventory control, and accurate documentation for continuing protection of electrical distribution systems.