Y S Engineering Solution offers a rigorous Air Circuit Breaker (ACB) Testing and Service program to guarantee the safety and reliability of critical Electrical protection devices. This systematic service involves a thorough mechanical inspection, cleaning, and lubrication of the operating mechanism and arc chutes, which is crucial for smooth function. A core component of their offering is comprehensive Electrical Testing, including Contact Resistance Measurement (CRM) to check for contact wear, and most notably, Secondary Injection Testing. This specialized testing procedure utilizes sophisticated equipment to simulate various fault conditions—such as overload and short-circuit—directly into the electronic trip unit. By verifying and calibrating the trip unit's response time and accuracy under these simulated faults, Y S Engineering Solution ensures the ACB will reliably interrupt current when a real fault occurs, preventing catastrophic failures and minimizing costly system downtime.