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    Masterpact NW

    High current air circuit breakers from 800 A to 6,300 A

    Commonly used in UL891 switchboard applications, serving large industrial and large commercial facilities.

    Masterpact NW
    • Features

      Square D™ Masterpact circuit breakers continue to set the standard with innovations and technology to improve performance and uptime, speed of installation, while offering superior flexibility to help you meet greater needs for circuit protection reliability. The next-generation air circuit breakers provide higher interrupting ratings, smaller footprint, and more accessories than any other insulated case breaker. 
      Additional features include:

      • Rugged racking, clusters and cluster shield designs are more robust, reducing unscheduled downtime.
      • Reinforced insulation barriers separate the circuit breaker front from the current path for greater protection.
      • Fastest to change out with fewer tools required, reducing maintenance costs and improving uptime.  New shutters use snap-in installation with no hardware required.
      • New design for racking in/out is more intuitive, offering faster maintenance to maximize uptime.
      • Variety of field-installable accessories including trip units and sensor plugs for optimum flexibility.
      • Available Micrologic™ trip units provide electronic circuit protection with adjustable protection settings for maximum system coordination and flexibility.

      Ideally suited for use with:
      • QED-6 switchboards
      • PowerZone 4 switchgear
      • Motor Control Centers
      • Other switchboard constructions

      Explore Masterpact in PZ4 Switchgear in 3D animation

      How to Videos

      Masterpact NW Padlock Attachment