The Megger MS-2A Circuit Breaker and Overcurrent Relay Test Set is used around the world by several thousand utility companies, industrial plants and electrical service organizations. Model MS-2A is a self-contained test set that incorporates a variable high-current output and appropriate control circuitry and instrumentation for testing thermal, magnetic or solid-state motor overload relays, molded-case circuit breakers, ground-fault trip devices and overcurrent relays. A variable DC voltage is needed to test a circuit breaker. Substation batteries should not be used since this entails considerable risk for testing personnel, testing equipment and also for the equipment being tested. The best way to ascertain whether or not solenoids and protective mechanisms are sluggish or set improperly is to perform a test at minimum tripping voltage. The minimum trip voltage test is described in a number of international and national standards such as IEC 62271-100, ANSI C37.09 etc.
- Light Weight, Portable Primary Injection Test Instrument
- Overcurrent Relay Testing
- Ground Fault Performance Testing for NEC 230.95
- Circuit Breaker Testing