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Westinghouse NB21200F - Molded Case Circuit Breaker Frame 1200A

Westinghouse
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The Westinghouse NB21200F is a 2-pole molded case circuit breaker frame designed for overcurrent protection in industrial power distribution systems. This frame-only unit, weighing 39 lb, is rated for 1200A at 600VAC and provides a 30kA interrupting capacity at 480VAC, utilizing thermal magnetic protection with LI (Long-Time and Instantaneous) trip functions. The breaker features a bolt-on connection, single-phase configuration, and is part of the NB Series, built for robust performance in demanding environments. It complies with industry standards for molded case circuit breakers, making it suitable for protecting feeders and large branch circuits in manufacturing plants, commercial buildings, and heavy machinery applications.

Key Features & Specifications
  • Type: Molded Case Circuit Breaker Frame
  • Voltage Rating: 600V
  • Current Rating: 1200A
  • Poles: 2
  • Connection: Bolt-On
  • Protection: Thermal Magnetic
  • AIC rating: 30kA@480V
  • Phase: 1
  • Functions: LI - Long-Time and Instantaneous
  • Weight: 39 lb
  • Family: NB Series
  • Additional Info: This item is Frame only as defined by the part number. That means it is only the circuit breaker frame, and no lugs or trip unit is included with the frame.


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