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Westinghouse NB3900 - Molded Case 900A 3-Pole Breaker

Westinghouse
Price
Save $-2,772.94
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Condition
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Westinghouse NB3900 is a 3-pole molded case circuit breaker from the NB Series, designed to provide reliable overcurrent protection in industrial and commercial power distribution systems. It is rated for 900A continuous current at 600V AC, with an interrupting capacity of 30kA at 480V, and utilizes thermal magnetic protection with LI (Long-Time and Instantaneous) trip functions. The breaker features a bolt-on connection for secure installation, weighs 61 lb, and is built on a robust NB frame for durability in demanding environments. It complies with industry standards for molded case circuit breakers, ensuring safe and consistent performance. Typical applications include main switchboards, feeder circuits, and heavy-load distribution panels in manufacturing plants and commercial facilities.

Key Features & Specifications
  • Type: Molded Case
  • Family: NB Series
  • Poles: 3
  • Current Rating: 900A
  • Voltage Rating: 600V
  • Interrupt Rating: 30kA @ 480V
  • Protection: Thermal Magnetic
  • Functions: LI - Long-Time and Instantaneous
  • Connection: Bolt-On
  • Weight: 61 lb
  • Phase: 3