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MasterPact UR

Ultra Rapid Circuit breakers 5000 and 6000A

End of Commercialisation

Part of Pact Series

MasterPact UR is designed to protect electrical systems with outstanding performance in terms of short circuit current limitation and fault detection speed. It contributes to safety and performance wherever high short-circuit current is involved.

Micrologic electronic control unit embedded in Masterpact UR
  • Features

    • Rated current: 5000 and 6000A
    • 2 Icu performances: 150kA at 440V – 100kA at 690V
    • Rated operational voltage: 690V
    • 1 frame 5000/6000A
    • 3 pole and drawout version
    • 1 "UR control module"
    • 1« UR power module »
    • 1 thruster mechanism: Thomson effect Coil
    • Micrologic control units A,P,H
    • Auxiliaries and accessories identical to standard Masterpact range
    • Compliance with IEC 60947-2 international standards
    • Compliance with the specifications of Marine classification companies: Lloyd’s Register , Bureau Veritas


    Wherever high short-circuit current is involved Masterpact UR takes control

    As installed power increases, electrical distribution has to shift from LV design to a MV design.
    Built from the highly reliable standard air circuit-breaker, Masterpact UR has been developed to allow much higher installed power with LV design.

    Best advantages:

    • Cost effective solution
    • No MV needed, easier maintenance
    • Simpler solution, reduced time to market.


    Specific applications:
    • Busbar coupling onboard merchant vessels, off-shore platform
    • Loop networks in industry, cement plant - petrochemical industry

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