The CB-845 circuit breaker test set is a high current circuit breaker test set consisting of a control unit that incorporates the latest in solid-state metering, control technology, and a high current output unit.
The CB-845 is suitable for a wide variety of testing requirements, including molded-case circuit breakers; thermal, magnetic, or solid-state motor overload relays and other overcurrent protective devices. Additional applications include verifying the ratio of current transformers and testing ground-fault trip devices.
The instrument can also test the time-delay characteristics of motor overload relays and molded-case circuit breakers rated up to 500 amperes when following the recommended test procedure of testing the time-delay of thermal devices at three times their rating. Instantaneous trip elements can also be tested with the higher currents required for these tests. For example, the test set will provide short-duration output of 5000 amperes through a typical 500 ampere, molded-case circuit breaker.
The lightweight, two-section design of Model CB-845 enables you to easily transport the unit into areas previously inaccessible to high current test equipment, such as elevated or subsurface load centers, shipboard power panels, elevator machinery rooms, and other isolated locations.