The Air Circuit Breaker (ACB) is an electrical device used to provide overcurrent and short-circuit protection for electric circuits over 800 Amps to 10K Amps. These are usually used in low voltage applications below 450V. We usually see them in Main Distribution Boards (MDBs) as the incoming breaker. The ACB is designed to act as the primary point of isolation and as a protection in the event of a fault or over current occurring on the system, thereby safeguarding the system up-line. Failure to operate can lead to serious consequences.
An ACB is a circuit operation breaker that operates in the air as an arc extinguishing medium, at a given atmospheric pressure. The ACB can remain in an ‘On’ or ‘Closed’ position for months and years and without being activated and without regular maintenance it can fail to operate without warning and can lead to major consequences.
Cornerstone’s inspections are based on BS 6423 & IET standards and our experience involves different industry types – oil and gas, factories, hotels, healthcare, schools, residential and commercial real-estate across UAE, Qatar, Kuwait & Saudi Arabia.
The below is an overview of the different tasks involved in the testing of an ACB:
General Inspection & functional test:
Electronic trip by using test kit & ETU settings.
Cornerstone has vast experience working with all ACB brand types including ABB, Merlin Gerin, Schneider Electric, GEC, Mitsubishi, Moeller & Federal providing standalone testing to full maintenance services.
We bring value to our clients by designing custom maintenance programmes and inspections as per their need and priorities, maximizing productivity and profit.