ACB (Air Circuit Breaker) Testing and service is a critical, proactive process essential for the safety and reliability of any large-scale electrical system. As a crucial protective device, ACBs can fail over time due to dust, wear, corrosion, or lack of use. Regular servicing is a comprehensive procedure that involves a thorough visual inspection, followed by cleaning and lubrication of all mechanical components. Technicians perform crucial electrical tests, such as contact resistance and insulation resistance, and secondary injection testing to verify that the trip unit operates within its specified parameters. This preventative service is vital for identifying potential issues before they cause a catastrophic failure, which could lead to a costly power outage, equipment damage, or a fire. Ultimately, routine ACB maintenance extends the life of the breaker and ensures continuous, safe operation.