Application Of Circuit Breaker Tester

The circuit breaker tester is suitable for various types of circuit breaker overload protection tests and relay overcurrent tests. It can test plastic circuit breakers, thermal, magnetic or solid CB generator overload relays and other overcurrent protection devices. In addition, it can also verify the ratio ratio of current transformers, and can test the equipment for ground fault.
The time-delay characteristics of generator overload relays and molded circuit breakers can be tested with CB-845 at rated currents up to 500A. When using the recommended test procedure to test the time-delay characteristics of thermally coupled devices, the current should be three times. A high current is necessary to test the instantaneous trip time of the equipment. For example, the tester will deliver up to 5000A of output current for a short period through a typical 500A molded circuit breaker.