ANSI Certified Masterpact Circuit Breakers

Available in NT series up to 800A and in NW series up to 6000A.

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 5000A (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

Read about Masterpact NW Circuit Breaker Customer Announcements and Updates.

Related Documents and Downloads
Related Products

 

Square D logo

Applications

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

For a complete listing of documentation for this product, please consult the Technical Library.

Brochures
Commercial and Industrial Circuit Breakers for OEM Applications 0106BR9806
Catalogs
Masterpact NT/NW Universal Power Circuit Breakers 0613CT0001
Data Bulletins
Four-pole UL Listed Circuit Breakers and Switches Class 615 0615DB0301
Ground-fault Systems for Circuit Breakers Equipped with Micrologic Trip Units 0613DB9905
Low-voltage Power Circuit Breakers: Specification Recommendation 0613DB9904
Masterpact NW UL/ANSI Terminations 0613DB0201
Handouts
Masterpact NT ANSI-Certified/UL1066-Listed Power Circuit Breakers 0613HO0201
MASTERPACT NW ANSI-Rated Low Voltage Power Circuit Breakers 0613HO9901
Instruction Bulletins
Bus Connectors (UL/ANSI) for Masterpact NT and Drawout P-frame Circuit Breakers 48049-327-01
Connectors for UL Listed and ANSI Certified Masterpact NW Circuit Breakers 48049-219-03
Dielectric Testing Masterpact and Powerpact Circuit Breakers with Micrologic P and H Trip Systems 48049-550-01
Field Testing and Maintenance Guide for Thermal-Magnetic and Micrologic Electronic Trip Circuit Breakers 0600IB1201
Field Testing and Maintenance Guide for Thermal-Magnetic and Micrologic Electronic Trip Molded Case Circuit Breakers 48049-900-02
Masterpact NT Low-voltage Power/ Insulated Case Circuit Breaker 48049-225-04
Masterpact NW Low-voltage Power / Insulated Case Circuit Breaker 48049-106-10
Metering Current Transformers for Masterpact® NW Circuit Breakers 48049-157-02
Neutral Current Transformers for Masterpact NT, P-frame and NS630b-NS1600 Circuit Breakers 48049-273-04
Neutral Current Transformers for Masterpact NW, R-frame and NS1600b-NS3200 Circuit Breakers 48049-222-04
Primary Injection Test Kit for Masterpact NW Circuit Breakers 48049-898-01
Primary Injection Test Kit ULW10027 for Masterpact NT Circuit Breakers 48049-899-01
Push-in and Ring Terminal Connectors for Masterpact NW Drawout Circuit Breakers 48049-161-01
Push-in or Ring Terminal Cradle Position Switch for Masterpact NW Drawout Circuit Breakers 48049-154-01
Shutter Kit for UL Listed and ANSI Certified Masterpact NT and P-frame Drawout Circuit Breaker 48049-294-02
Shutter, Shutter Padlock Provision and Shutter Indicator for Ul/ANSI Masterpact NW Circuit Breakers 48049-152-01
Price Lists
Masterpact NT/NW Universal Power Circuit Breakers 0613PL0001
trip curves
613-15 Masterpact NW Low Arc Flash Circuit Breaker (L1F AND LF) 800-2000 A, 60 Hz 613-15
613-16 Masterpact NT Low Arc Flash Circuit Breaker (L1F AND LF) 800-1200 A, 60 Hz 613-16