The Motor and Phase Rotation Tester
permits the electrical contractor or industrial maintenance electrician to
permanently connect and tape the terminals of the motor being installed, without
having to first energize the motor by a temporary hookup from a power source, if
available, to determine motor rotation. Therefore, the test set eliminates the
need for temporary connections that can be time consuming, costly and quite
hazardous, particularly where many large, high-voltage motors are involved.
Also, certain types of drives should never be rotated in the wrong direction. In
such cases, the temporary hookup or trial method, having a fifty-fifty chance of
being wrong, can do serious harm.
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