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air circuit breaker (ACB)

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Last Updated
21 Sep 2021
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Specification of air circuit breaker (ACB)

Masterpact NW - High current air circuit breakers from 800 to 6300 A




  • 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

  • Wide range of common auxiliaries and accessories interchangeable on site

  • Compliance with international standards IEC 60947-1 and 2, IEC 68230 for type 2 tropicalization, UL489 and ANSI/UL1066

  • CCC and GOST certifications

  • Compliance with specifications of marine classification bodies: Bureau Veritas, Lloyd’s Register of Shipping, Det Norske Veritas, etc.

     



Benefits



The worldwide benchmark for high-current circuit-breakers

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 from 4000 to 6300 A.

At a time when installations are becoming increasingly complex, Masterpact NW enables standardisation of electrical switchboards by providing unrivalled simplicity in terms of both choice and installation.



Applications



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)


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