Westinghouse 718B721G37 Polar Unit Shunt Trip Assembly

The Westinghouse 718B721G37 Polar Unit Shunt Trip Assembly enables remote trip and shutdown control for industrial circuit breakers. Commonly installed in switchgear assemblies, breaker control equipment, and industrial power distribution systems, it serves breaker protection replacement, electrical maintenance, and retrofit projects. This breaker-mounted unit (HU-1) is designed for industrial circuit breaker protection and is compatible with industrial switchgear and power distribution equipment. Specifications: Manufacturer Part Number (MPN) 718B721G37; Product Type Shunt Trip Assembly; Brand Westinghouse; Unit Type Polar Unit HU-1; Application Type Industrial Circuit Breaker Protection; Function Remote Breaker Trip and Shutdown Control; Installation Type Breaker Mounted; Typical Use Breaker Protection and Electrical Maintenance; Industrial Environment Manufacturing and Commercial Facilities. Common Replacements include Square D S33595 Shunt Trip Module, Eaton S29322 Shunt Trip Assembly, and Siemens MTX3B800SHT Shunt Trip Unit.