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Air Circuit Breaker (ACB)
Masterpact NT
Masterpact NT is the world's smallest true power circuit-breaker with ratings from 630 A to 1600 A, extremely innovative in that it delivers the high performance of a power circuit-breaker despite its very small dimensions. The various connection pads make it possible to optimise the different configurations and solutions. It's concentrated all the performances of a sophisticated power circuit breaker in compact dimensions. Masterpact NT optimises the installation and guarantees its operation in complete peace of mind.
  • Optimised volumes.
  • Ease of installation.
  • Maximum security.
  • Compliant with international standards.
  • Compliance with environmental requirements.
  • Nominal current: 630 to 1600 A.
  • Breaking performance: 42 to 150 kA at 220/415 V AC.
  • Voltage rating: up to 690 V.
  • 1 single physical size from 630 to 1600 A.
  • A single pole pitch of 70 mm.
  • 3 and 4-pole versions.
  • 5 Micrologic control units enriched by measurement, energy management and network analysis functions.
  • Earth leakage protection built into electronic protection.
  • Compliance with international standards.
Masterpact NW
The Masterpact NW circuit-breaker range features optimised dimensions: not only is it more compact, but even better two sizes are sufficient to cover requirements, one from 800 A to 3000 A and the other for 4000 A to 5000 A.
The Masterpact NW enables standardisation of electrical switchboards by providing unrivalled simplicity in terms of both choice and installation.
  • Nominal current: 800 to 6300 A.
  • Breaking performance: 42 to 150 kA at 220/415 V AC.
  • Voltage rating: up to 1000 V.
  • 2 physical sizes from 800 to 6300 A.
  • 2 pole pitches of 115 and 230 mm.
  • 3- and 4-pole versions.
  • 5 types of Micrologic control units with added measurement, energy-management and network-analysis functions.
  • Earth leakage protection built into the control unit.
General applications:
  • Protection, measurement and communication of LV electrical networks.
  • Generator protection.
  • Motor protection.
Special applications:
  • DC networks.
  • Protection of installations in highly corrosive industrial environments.
  • Mines (special 1000V version of NW).
  • Navy.
  • Earthing switch.
  • High short-circuit current limiting (ultra-rapid Masterpact UR).