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Westinghouse HKB21500TM - Trip Unit 250A 600V 2-Pole

Westinghouse
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Westinghouse HKB21500TM is a MARK 75 series trip unit designed for instantaneous overcurrent protection in low voltage distribution systems. This 2-pole magnetic-only unit operates at a maximum voltage rating of 600V AC and a continuous current rating of 250 amperes. It weighs 2 lb and is compatible with KB and HKB frame circuit breakers, featuring a bolt-on mounting type for secure installation. The device complies with NEMA AB-1-1993 standards for reliable industrial performance. It is typically used in industrial and commercial applications requiring precise magnetic trip protection without thermal delay.

Key Features & Specifications
  • Type: HKB
  • Manufacturer: Westinghouse
  • Series: MARK 75
  • Poles: 2
  • Voltage Rating: 600V AC
  • Amperage: 250A
  • Amperage Minimum: 250
  • Amperage Maximum: 250
  • Trip Functions: Instantaneous (I)
  • Protection: Magnetic Only
  • Compatible Frames: KB, HKB
  • Mounting Type: Bolt-on
  • Weight: 2 lb
  • Standards Compliance: NEMA AB-1-1993


Part Number: HKB21500TM