Megger

AVO/Multi-Amp/Megger CB-845 Circuit Breaker Test Set

The AVO / Megger / Multi-Amp CB-845 circuit breaker test set consists of a control unit that incorporates the latest in solid-state metering, control technology and a high-current output unit. The lightweight, two-section design of the CB-845 enables the user 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.

The AVO / Megger / Multi-Amp CB-845 Circuit Breaker Test Set 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 time-delay characteristics of motor overload relays and molded-case circuit breakers rated up to 500 amperes can be tested with the CB-845, when following the recommended test procedure of testing the time delay of thermal devices at three times their rating. Instantaneous trip elements can 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.