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    Masterpact NT and NW Circuit Breakers - UL/ANSI

    LV power circuit breakers from 800 A to 6000 A

    Masterpact NT/NW offers a comprehensive range of circuit breakers designed and tested for applications in accordance to ANSI C37/UL1066 or UL 489 standards.

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    Masterpact NT and NW Circuit Breakers - UL/ANSI
    • Features


      Masterpact™ NT and NW circuit breakers protect electrical systems from damage caused by overcurrent events. In addition to the traditional features of power circuit breaker, Masterpact NT and NW ranges offer built- in communications and metering functions.

      The range of Masterpact NT/NW includes 2 families and 3 frame sizes

      • Masterpact NT, the world’s smallest true power circuit breaker, with ratings from 600 to 1600 A
      • Masterpact NW, in two frame sizes, one from 800 to 4000 A and the other from 4000 to 6000 A
      • Drawout or Fixed Mount, 3-Pole (3P) or 4-Pole (4P) Construction
      • Enhanced coordination by their adjustability, LI, LSI and LSIG with integral ground-fault protection
      • High interrupting ratings and withstand ratings
      • Communications and monitoring capability
      • Field-Installable trip units, sensor plugs and accessories


      Masterpact NT and NW incorporate the latest technology to enhance bothperformance and safety. Easy to install, with user-friendly, intuitiveoperation and environment-friendly design, Masterpact NT and NW are,quite simply, circuit breakers of their time.
      • Performance: interrupting ratings for standard distribution to high-performance and critical applications, high resistance to environmental stress and demanding operations
      • Safety: Advanced Micrologic trip unit adjustabilty offer precision selectivity, monitoring capability, advance protection functions
      • Easy to install and operate: range of field installable Micrologic trip units, sensor plugs and accessories, wide range of productiviy tools and support to help support productivity at all project stages


      • Commercial Buildings 
      • Industrial Buildings 
      • Water Wastewater 
      • Healthcare Facilities 
      • Wind Farm 
      • Data Centers