Circuit Breaker Testing

We can accurately test the performance of switching mechanisms which are key to the successful operation of circuit breakers. Trip timing can be expanded to the whole tripping system by incorporating secondary injection of protection relays.

1. Circuit Breaker Trip Test

TECHNIQUES

• Trip coil current profiling indicates the performance of the various elements of the tripping cycle
• Identify stiction, which indicates inadequate lubrication or the need for maintenance

BENEFITS

• Simple test eliminates potential performance problems

2. Secondary Injection of Overcurrent Relays

TECHNIQUES

• Injects overcurrent relays on or off load, to obtain overall protection performance timing

BENEFITS

• Documented test of protection performance at applied relay settings