MasterPact NW



MasterPact NW Air Circuit Breaker
  • Rated current: 800 to 6300 A
  • Breaking capacity: 42 to 150 kA at 220/415 V AC
  • Voltage rating: up to 1150 V AC
  • 2 physical sizes: 800 to 4000 A, and 4000 A to 6300 A
  • Draw out and fixed mount
  • 3-pole and 4-pole construction
  • Electronic MicroLogic control units, integrating current, voltage, power and energy metering enabling energy management, earth leakage protection, etc.
  • Switch disconnectors version available
  • Optimized range of field-installable auxiliaries and accessories
More info
MasterPact NW Product Selector  


Masterpact NT and NW Catalog (Version 4.3) (
Maintenance Guide:
MasterPact NT and NW Maintenance Guide (

Micrologic Trip Units Instructions:
MicroLogic 2.0A, 3.0A, 5.0A, and 6.0A Electronic Trip Units Instruction Bulletin (Version 03) (


Micrologic trip setting videos