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It allows to perform with sufficient power, all the primary current injections to test the proper function and wiring of all the elements that compose the protection and measuring section in a substation.

The regulation system is based on a continuously variable autotransformer (Variac) that supplies to a power transformer that delivers the high current outputs and isolates the main supply from the load. A built-in ammeter and a timer gives the information about the current value and the operation time of the relay or breaker under test.

APPLICATIONS

Direct and motor overload relay test.

In general, primary tests include the complete loop, i.e., current transformer, leads, protective relay and circuit breaker.