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Westinghouse NBY3900 - Non-Auto 900A 3P 240V Breaker

Westinghouse
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Westinghouse NBY3900 is a 3-pole, bolt-on molded case circuit breaker designed for use as a non-automatic switch providing no overcurrent protection in industrial power distribution systems. It is rated for 900A continuous current at 240V AC and delivers a high interrupting capacity of 100kA at 240V AC for three-phase applications. The unit weighs 61 lb and is constructed for bolt-on mounting within the NBY Series frame. This breaker is intended for use as a disconnect or switching device where separate overcurrent protection is provided elsewhere in the circuit. It is commonly applied in commercial and industrial settings requiring a robust, high-amperage disconnect switch.

Key Features & Specifications
  • Type: Non-Automatic (No Overcurrent Protection)
  • Current Rating: 900A
  • Voltage Rating: 240V AC
  • Number of Poles: 3
  • Phase: 3
  • AIC Rating: 100kA@240V
  • Connection: Bolt-On
  • Weight: 61 lb
  • Family: NBY Series
  • Subcategory: Molded Case