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.
Technical Specification
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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