The Westinghouse HKB3150T Trip Unit is a 3-pole breaker-mounted device that provides overcurrent and short-circuit protection for three-phase power circuits in industrial electrical distribution systems. With a 150 A current rating, 600 V AC voltage rating, and an 18 kA interrupt rating, it uses thermal-magnetic trip action to reliably interrupt fault currents. Designed to work with Westinghouse HKB circuit breakers, it installs as a breaker-mounted trip assembly in switchgear, motor control centers, and commercial/industrial panels for power distribution and motor protection.
