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Westinghouse HMA3250T - Thermal Magnetic Trip Unit 600V 250A 3-Pole

Westinghouse
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The Westinghouse HMA3250T is a thermal magnetic circuit breaker trip unit designed for overcurrent protection in industrial power distribution systems. This unit provides LI (Long-Time and Instantaneous) protection functions, operating at a voltage rating of 600V with a current rating of 250A across three poles. The trip unit weighs 4 lb and is built for a 250A frame size, compatible with MA and HMA frames. It complies with industry standards for thermal magnetic protection, ensuring reliable performance in demanding environments. Typical applications include motor control centers, switchboards, and panelboards requiring precise overcurrent coordination.

Key Features & Specifications
  • Type: Thermal Magnetic Trip Unit
  • Voltage Rating: 600V
  • Current Rating: 250A (Minimum 250A, Maximum 250A)
  • Poles: 3
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: 250
  • Protection: Thermal Magnetic
  • Compatible Frames: MA, HMA
  • Weight: 4 lb
  • Family: MARK 75
  • Item Subcategory: Trip Units & Programmers


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