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Westinghouse HKB3250TM - Magnetic Trip Unit 250A 600V 3-Pole

Cutler Hammer
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Westinghouse HKB3250TM is a magnetic-only trip unit designed for instantaneous overcurrent protection in industrial circuit breaker applications. This 3-pole unit is rated for 600V AC and carries a continuous current rating of 250A, with a minimum amperage of 250A and a maximum amperage of 250A. Weighing 2 lb, it is constructed as a compact trip unit and programmer within the MARK 75 family, compatible with KB and HKB breaker frames. It provides instantaneous (I) protection functions, ensuring rapid response to short-circuit conditions without thermal delay. Typical applications include motor control centers, switchboards, and industrial power distribution systems requiring magnetic-only protection.

Key Features & Specifications
  • Type: Trip Unit & Programmer, Magnetic Only
  • Voltage Rating: 600V AC
  • Current Rating: 250A (Minimum: 250A, Maximum: 250A)
  • Dimensions: Not specified
  • Standards: Not specified
  • Applications: Industrial power distribution, motor control centers, switchboards
  • Switch Type: Not specified
  • Configuration: 3-Pole
  • Coil Voltage Maximum: Not specified
  • Temp Rating: Not specified
  • Shipping Dimensions: Not specified
  • Phase: Not specified
  • Voltage: 600V
  • Amperage: 250A
  • AIC rating: Not specified
  • Connection: Not specified
  • Poles: 3
  • Protection: Magnetic Only
  • Functions: I - Instantaneous
  • Frame Size: Not specified
  • Trip Type: Instantaneous
  • Panel Type: Not specified
  • Breaker Type: Not specified
  • Control Voltage Minimum: Not specified
  • Control Voltage Maximum: Not specified
  • MCM Size: Not specified
  • Metal Type: Not specified
  • Panel Style: Not specified
  • Bus Type: Not specified
  • Fuse Class: Not specified
  • Insulation Temperature: Not specified
  • Inductance: Not specified
  • Impedance: Not specified
  • Barrels: Not specified
  • Class Rating: Not specified
  • Diameter: Not specified
  • Velocity: Not specified
  • Clip Center: Not specified
  • Clas: Not specified
  • Mounting: Not specified
  • Hz: Not specified
  • Coil Material: Not specified
  • Horse Power: Not specified
  • Aux Contacts: Not specified
  • CPT: Not specified
  • Full Load Amps: Not specified
  • Dist Voltage: Not specified
  • Bucket Size: Not specified
  • Bucket Style: Not specified
  • Bucket Type: Not specified
  • Full Load Amp Maximum: Not specified
  • Full Load Amp Minimum: Not specified
  • Enclosure: Not specified
  • Relay Style: Not specified
  • Coil Voltage Minimum: Not specified
  • Wire: Not specified
  • Amperage Maximum: 250
  • Amperage Minimum: 250
  • Nema Rating: Not specified
  • Switch Style: Not specified
  • Wire Size: Not specified
  • Certification: Not specified
  • Circuit Breaker Mounting Style: Not specified
  • Terminal Connection: Not specified
  • Frequency Rating: Not specified
  • Phase Connection: Not specified
  • Standards: Not specified
  • Compatible Frames: KB, HKB
  • Installation Type: Not specified
  • Item QTY: Not specified
  • Nema Starter Size: Not specified
  • Breaker Frame: Not specified
  • Current Rating: 250A
  • Reverse Standoff Voltage: Not specified
  • Watts: Not specified
  • Peak Pulse Current: Not specified
  • Breakdown Voltage (MIN VBR@IT ) (V): Not specified
  • Breakdown Voltage (VBR@IT) (V): Not specified
  • Polarity: Not specified
  • Operating Temperature Maximum Celsius: Not specified
  • Max Clamp Voltage: Not specified
  • On-State Current: Not specified