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The motor insulation resistance tester is engineered to evaluate the insulation condition of electric motors, generators, and other rotating electrical machines. Insulation resistance measurement is a widely adopted practice throughout motor manufacturing, installation, commissioning, and preventive maintenance programs.
The instrument applies a selected DC test voltage to the motor winding insulation and measures the resulting resistance value, helping maintenance engineers identify potential insulation deterioration at an early stage. For more comprehensive insulation assessment, compatible models may also provide Polarization Index (PI) and Dielectric Absorption Ratio (DAR) measurements.
With digital measurement and convenient operation, the tester is well suited to industrial motor maintenance teams, motor manufacturers, power plants, and electrical testing laboratories.
It helps evaluate winding insulation condition and identify potential insulation deterioration before equipment is returned to service.
PI is the ratio of insulation resistance measured at 10 minutes to the resistance measured at 1 minute, following the applicable test procedure.
Yes. Suitable insulation resistance testers are commonly used for generator winding insulation testing.
No. The motor must be properly isolated and prepared for testing according to the manufacturer's instructions and applicable safety procedures.
Always isolate and discharge the equipment under test before connecting the tester. Follow the manufacturer's instructions and all applicable site safety procedures when performing insulation resistance measurements.
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