Air circuit breaker service and repair

An 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. It is vital they are serviced to keep them in good repair. 

Why do I need to service my air circuit breakers?

We find many common faults with air circuit breakers including them not turning on or off, not charging up or resetting or not tripping off as required. Other problems include the breaker not staying closed when turned on and erratic or nuisance tripping off of the breaker.

Many of these issues can be avoided by devising an appropriate service schedule that suits your needs.

How can Equiptest help me?

To ensure your equipment operates reliably we recommend an appropriate maintenance plan.  Each site and ACB is different. Therefore after a discussion with you we will create a service schedule that suits you and your site. The schedule depends on the environment your ACBs operate in, and how often they operate in. Too little use causes as much need for maintenance as excessive use.

An Equiptest service plan enables us to service your Air Circuit Breaker in situ if fixed, or if with-drawable to remove and work on it at our premises. During the service we disassemble certain elements of the ACB to allow inspection, lubrication, repair and testing. We have a range of specialised secondary injection equipment to enable us to test the operation of the ACBs electronic trip units and their parameters.

Do you also service distribution and control panels?

We also offer a complimentary service for your distribution and control panels. We recommend that the panels are cleaned inside and out to remove dirt and dust periodically. At the same time the switchgear connections can be checked and tightened and the supply and distribution busbar connections can be re-torqued.

We have seen many instances where dirt on busbars and loose connections can cause noise, excessive heat and ultimately system failure due to lack of maintenance.

Do your Air circuit breakers need servicing or repair?

It is important that your air circuit breakers function correctly.  Contact us to find out how we can help you.  Based in Bristol we cover the whole of the UK.