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The Megger MS-2 Circuit Breaker and Overload Relay Test Set is capable of testing the time-delay characteristics of motor overload relays and molded-case circuit breakers rated up to 125 amperes, when following the recommended test procedure of testing the time delay of these devices at three times their rating. Higher currents are available for the short durations required to test an instantaneous trip element.
For example, the test set will provide a maximum shortduration output of 600 amperes through a typical, 125 ampere, molded-case circuit breaker. Additional applications for the Megger MS-2 Circuit Breaker and Overload Relay Test Set include verifying the ratio of current transformers and testing panelboard ammeters and voltmeters.