Air Circuit Breakers

Air Circuit Breakers (ACB) are most commonly found in large industrial facilities. They are typically controlled electronically. An important characteristic of air circuit breakers is that they are almost always set up to facilitate easy maintenance. Air circuit breakers may use compressed air to blow out the arc, or alternatively, the contacts are rapidly swung into a small sealed chamber, the escaping of the displaced air thus blowing out the arc. Circuit breakers are usually able to terminate all current very quickly: typically the arc is extinguished between 30 ms and 150 ms after the mechanism has been tripped, depending upon age and construction of the device. ACB can be used both as circuit-breakers for general protection (of plants, of user complexes, of electric lines) and as protection circuit-breakers of electrical machines (generators, motors, transformers, capacitors). They are used in all types of plants (civil, industrial, and in the service sector) as well as in the equipment on-board ships, in mines, in prefabricated substations, and for primary and secondary distribution in general.

Specification:

Reference Standards: Conforms to IS 13947 (Part2), IEC 60947-2.

Amps. Range: 400 Amps to 3200 Amps.

No. of Poles: 3 & 4 Pole.

Voltage: 240 Volts, 415 Volts.

Breaking Capacities: Upto 100 KA.

Operation Method: Manual or Electrical Operation.

Version Type: Fixed, Draw-out.

Protection Unit: Thermal Magnetic, Microprocessor based.

Brands Available: L&T, SIEMENS, HAVELL’S, SCHNIDER, BCH, etc.

Secondary links

Air Circuit Breakers