Masterpact NT - NW Navy

Circuit breakers to protect lines up to 4000 A, certified for Navy applications

Part of PacT Series

MasterPact NT and NW Navy is a range of air circuit breakers designed to protect electrical systems from damage caused by overloads, short circuits and equipment ground faults, complying with Navy requirements. MicroLogic control units are embedded contributing to safety and energy efficiency. The range covers ratings from 630 to 4000 A in two different sizes..

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Masterpact NTEal operated versions :-

  • 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- pole withdrawable version.

  • Masterpact NW.

  • Nominal current:800 to 4000 A.

  • Breaking performance:42 to 100 kA at 220/415 V AC.

  • Voltage rating:up to 690 V.

  • 2 physical sizes from 800 to 4000 A.

  • A single pole pitch of 115 mm.

  • 3-pole withdrawable version.

  • Switch-disconnector version.

  • Micrologic control units 2.0A, 5.0A, P, H enriched by measurement, energy management and network analysis functions.

  • Specific design with anti-shock and vibration systems to meet the severe requirements of naval applications:.

  • 18g - 11 ms ½ sine shock pulse.

  • Vibration:2g acceleration.

  • 5 to 60Hz -Insensibility to naval displacement..

  • Compliance with international standards IEC 60947-1-2-3, CEI60068-2-27 for high shock resistance - CEI60068-2-6 for vibration resistance.

  • Compliance with specifications of marine classification companies: Veritas, Lloyd's..


  • Maximum continuity of service The Masterpact NT NW Navy range benefits from the outstanding features developed for the industrial version:electrical switchboard standardisation, optimisation of volumes and ease of installation..

  • High shock and vibration resistance systems have been added to these circuit breakers to meet the severe requirements of optimum continuity of service of naval applications..


  • The Masterpact NT NW Navy range has been specifically designed for the electrical distribution architecture of international military ships and sub-marines.