Insulated Case Circuit Breakers

The Masterpact® NW/NT series leads the industry with higher interrupting ratings, smaller footprint, and more accessories, including our exclusive "P" trip unit, which provides built-in PowerLogic® power monitoring capabilities. These circuit breakers are commonly used in UL891 switchboard applications, serving large industrial and large commercial facilities.

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Masterpact NT Accessories
Masterpact NT UL489 Circuit Breakers
A fully tested, full-featured power circuit breaker in the smallest footprint available on the market today - 70% smaller than the Masterpact NW circuit breaker. The Masterpact NT Circuit Breaker (800 to 1600 A) is designed to protect electrical systems from damage caused by overloads, short circuits and equipment ground faults. It incorporates the latest advances in circuit breaker technology.
Masterpact NW Accessories
Masterpact NW UL489 Circuit Breakers
The latest generation of MASTERPACT NW breakers provides more options and flexibility to help you meet greater needs for circuit protection reliability. Using the latest in technology to provide higher interrupting ratings, smaller footprint and more acce
Test Equipment
Test kit bulletins and manuals for the Full Function Test Kit (FFTK), Hand Held Test Kit (HHTK), Universal Test Set, and report generator software used for uploading FFTK test files to a PC.

Obsolete Products