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Westinghouse HKB31750TM - Magnetic Trip Unit 250A 600V 3-Pole

Westinghouse
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Westinghouse HKB31750TM Circuit Breaker is a magnetic-only trip unit designed for instantaneous overcurrent protection in industrial power distribution systems. It is rated for 600V AC and carries a continuous current rating of 250A, with a 3-pole configuration ensuring robust fault interruption. The unit weighs 2 lb and is constructed as a compact, solid-state trip device from the MARK 75 family, compatible with KB and HKB frames. It complies with industry standards for magnetic protection, offering reliable short-circuit response without thermal delay. Typical applications include motor control centers, switchboards, and industrial panelboards requiring precise instantaneous trip coordination.

Key Features & Specifications
  • Type: Magnetic Only Trip Unit, solid-state, instantaneous operation
  • Voltage Rating: 600V AC
  • Current Rating: 250A (minimum 250A, maximum 250A)
  • Poles: 3
  • Functions: I - Instantaneous
  • Protection: Magnetic Only
  • Compatible Frames: KB, HKB
  • Weight: 2 lb
  • Family: MARK 75
  • Item Subcategory: Trip Units & Programmers


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