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Westinghouse LB3400T - Thermal Magnetic Trip Unit 400A 600V 3-Pole

Westinghouse
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Westinghouse LB3400T is a thermal magnetic circuit breaker trip unit designed for overcurrent protection in industrial power distribution systems. It provides long-time and instantaneous (LI) protection functions with a voltage rating of 600V and an adjustable amperage range from 400A minimum to 400A maximum. This 3-pole unit weighs 2 lb and is part of the AB DE-ION family, compatible with LB and HLB frame circuit breakers. It meets industry standards for reliable performance in demanding environments. Typical applications include protecting feeders, motors, and transformers in manufacturing plants, commercial buildings, and utility substations.

Key Features & Specifications
  • Type: Thermal Magnetic Trip Unit
  • Voltage Rating: 600V
  • Current Rating: 400A
  • Poles: 3
  • Functions: LI - Long-Time and Instantaneous
  • Protection: Thermal Magnetic
  • Compatible Frames: LB, HLB
  • Weight: 2 lb
  • Family: AB DE-ION
  • Item Subcategory: Trip Units & Programmers


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