The ANSI Certified Masterpact® NT/NW Circuit Breakers are designed to meet the requirements of UL 1066 and ANSI C37. These are designed to protect electrical systems from damage caused by overloads, short circuits and equipment ground faults. All Masterpact circuit breakers are designed to open and close a circuit manually, and to open the circuit automatically at a predetermined overcurrent setting.

ANSI Certified Masterpact NT series features

Available in frame ampere rating up to 800A
Interrupting Rating 42kA at 254Vac, 42kA at 508Vac
Available in fixed and drawout constructions
Rotated rear terminals (rotatable from horizontal to vertical and vice versa) and front-connected terminals are available

ANSI Certified Masterpact NW series features

Available in frame ampere ratings up to 4000A (W-frame) and 6000A (Y-frame, wide-construction)
Interrupting Rating 200kA at 254Vac, 200kA at 508Vac, 130kA at 635Vac
Available in fixed and drawout constructions (Drawout in W-frame available only up to 3200A)
Rotated rear terminals (rotatable from horizontal to vertical and vice versa) and front-connected terminals are available

Common features

Rated for AC voltage systems through 635V
Cradle position indicator: connected, test and disconnected
Simple, visual contact wear indicators available
Full complement of field-installable accessories common to all standards available for flexibility and helps in reducing inventory holding cost
Four interchangeable and upgradeable Micrologic trip unit models to choose from
Available PowerLogic® based power metering and monitoring capabilities
Meets UL 1066 and ANSI C37 standards

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