The Cutler Hammer 70C1056G54 Circuit Breaker Test Set is a handheld battery powered tester capable of testing trip elements for Digitrip family of Magnum power circuit breaker trip units. The Digitrip 520 family includes the Digitrip 220+, 520, 520i, 520M, 520Mi, 520MC and 520MCi. In addition it can test the Digitrip1150 family consisting of the Digitrip 1150, 1150i and Digitrip 1150V and 1150Vi by overlaying a nameplate on the tester. An Auxiliary Power Module is included to provide trip unit power to illuminate the trip units having display LEDs. The molded case Digitrip 310+ and 210+ circuit breakers can also be tested with the addition of the respective overlay and test cable assembly supplied in the kit. The type of tests that can be performed are trip unit Power Up, Long Time Trip, Instantaneous Trip, Short Delay Trip, and Ground (Earth) Fault Trip.