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.
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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