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Westinghouse NB31200 - Molded Case Circuit Breaker 1200A 3P (30kA AIC)

Westinghouse
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Westinghouse NB31200 is a molded case circuit breaker designed for providing reliable overcurrent protection in demanding three-phase industrial power systems. It features a 1200A continuous current rating and a 600V voltage rating, with a robust thermal-magnetic trip unit offering both long-time and instantaneous (LI) protection functions. The breaker is constructed as a three-pole, bolt-on unit with a 30kA interrupting capacity at 480V, housed in a durable molded case that meets industry standards for safety and performance. This device is engineered for compliance with relevant electrical codes and is typically applied in industrial distribution panels, switchgear, and as a main circuit protector in commercial and manufacturing facilities.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker, NB Series, Thermal-Magnetic Protection
  • Voltage Rating: 600V AC
  • Current Rating: 1200A
  • Poles: 3
  • Connection: Bolt-On
  • Protection Functions: Long-Time and Instantaneous (LI)
  • AIC Rating: 30kA @ 480V
  • Phase: 3
  • Frame: NB
  • Weight: 61 lb