Air Circuit Breaker (ACB)


Air Circuit Breaker (ACB)

Air Circuit Breaker is used for low voltage system protection. It trips  if any short-circuit fault or  overcurrent fault will take place. The fire  extinguishing  medium is  used for ACB is  Air and it  depends  on  the  contact resistance of the breaker. If the  contact  resistance is higher,  then  it  might  cause fire.  Moreover,  the  trip mechanism failure can lead to damage of the equipment. So,  as  per  NFPA 70B ACB  should  be  tested and maintained for proper functioning. Edge Engineering can provide the below testing facilities.

Maintenance of an ACB according to NFPA 70B

  1. Visual Inspection
  2. Contact Resistance
  3. Insulation Test
  4. Tripping Testing


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