These tests are essential in determining the health of a motor.” If the problem is electrical, testing usually consists of insulation resistance tests and a low-resistance test. “Then proceed step by step in the indicated direction to eliminate potential failures until the correct one is found.
“First, distinguish whether the problem is electrical using an insulation tester or mechanical ,” Jowett said. Jeff Jowett, Megger senior applications engineer, said a basic electric motor test kit includes an insulation resistance meter with a thermocouple or infrared thermometer for temperature, voltmeter with supply phase direction of rotation, low-resistance meter, motor direction of rotation meter, inductance and capacitance meter, and a complete set of test leads to perform each test. To keep electric motors running efficiently, they require tests to analyze and troubleshoot operation. Fire and safety issues, wasted energy, unexpected breakdowns, unnecessary wear on equipment, early replacement-these are some of the serious and costly problems that can result from improperly operating electric motors.
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