Westinghouse Electric Corporation KB3250F Circuit Breaker Frame

The Westinghouse KB3250F Circuit Breaker Frame is a 3-pole molded‑case frame rated for 250 A and 600 V AC, designed to house interchangeable trip units for overcurrent and short‑circuit protection in high‑capacity three‑phase power circuits. It uses fixed mounting for panel‑mounted installations and serves as the structural housing and trip‑unit support for KB series molded‑case breakers. Commonly installed in switchgear assemblies, panelboards, motor control centers, and industrial electrical panels, it enables modular protection configurations and dependable frame integrity in commercial and industrial electrical systems. The configuration is No Trip Unit Included, making it suitable for replacements, rebuilds, or upgrades within established KB series protected networks. Typical applications include manufacturing facilities, commercial buildings, HVAC systems, industrial automation equipment, and power distribution applications where reliable high‑capacity breaker support is critical. Common replacements include Eaton KB3250F, Cutler‑Hammer KB3250F, and Square D KA36250.