Overview

Lauritz Knudsen Air Circuit Breakers (ACBs) are engineered for superior power protection and advanced system management. Built with a modular and robust design, these ACBs deliver high breaking capacities and comply with global standards, including IS/IEC 60947-2. Offering a wide current range from 400A to 6300A and short-circuit breaking capacities up to 100kA at 415V, they ensure maximum safety and reliability. Key features include easy upgradability, flexible configurations (fixed and draw-out types), manual and electrical operation options, and compatibility with multiple busbar arrangements. Designed for seamless integration, Lauritz Knudsen ACBs support industry-standard communication protocols for remote monitoring, enabling smart connectivity. Their user-friendly design ensures quick installation and simplified maintenance, making them the ideal choice for modern power distribution systems.

Discover Our Range of LK ACBs

How LK ACB Stands Out Among Competitors

Applications of LK ACBs

Technical Specifications

  • Rated operational voltage (Ue)

    415 V AC to 1000 V AC

  • Rated insulation voltage (Ui)

    1000/1250 V AC

  • Rated impulse withstand voltage (Uimp)

    12 kV for Main Circuit and 4 kV for Auxiliary Circuit

  • Rated current (In) (A)

    400 - 6300 A

  • Rated frequency (f)

    50/60 Hz

  • Rated short-circuit breaking capacity (Icu)

    50/65/80/100 kA

  • Rated service short-circuit breaking capacity (Ics)

    100% of Icu

  • Rated short time withstand capacity (Icw)

    100% of Icu

  • Pollution Degree

    Pollution Degree 4

  • Mechanical Impact Strength

    IK 08 / IK 10

  • Break Time

    25 ms

  • Closing Time

    60 ms

  • Compliance Standard

    IS/IEC 60947-2

  • Utilization Category

    B

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