LV ACB Testing
Air Circuit Breaker Testing for Low Voltage Systems
We provide expert testing for low voltage air circuit breakers (ACBs) across commercial and industrial systems. Our services confirm the safe operation of ACBs under normal and fault conditions, helping you prevent system failures and meet safety requirements.
Why ACB Testing Is Important
Air circuit breakers protect against overloads, short circuits and equipment failure. Regular testing ensures ACBs trip correctly, respond to settings, and operate mechanically as expected.
Our services include:
- Functional testing of all trip units
- Secondary injection testing
- Mechanical and contact inspection
- Insulation and continuity checks
- Settings verification and calibration
All testing is performed using calibrated equipment and in accordance with current UK safety and electrical standards.
When ACB Testing Is Required
We carry out ACB testing during new installations, planned maintenance, and after faults or operational issues.
This service is suitable for:
- Switchboards and LV panels
- Backup generator systems
- Commercial electrical installations
- Data centres and industrial sites
- Power distribution upgrades
Each service includes a full test report with clear pass/fail results and recommendations if required.
Frequently Asked Questions
What is ACB testing?
It is the process of verifying the operation of low voltage air circuit breakers, including trip settings, fault response and mechanical function.
How often should ACBs be tested?
Testing is recommended every 1 to 3 years depending on usage, environment and manufacturer guidelines.
Can testing be done with the power on?
Some tests (like secondary injection) can be done offline without full system shutdown. We’ll advise the safest method for your setup.
Will I get a test report?
Yes. You will receive a detailed report with measured values, settings, condition assessment and recommendations.