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Reply to "What motor tests are predictive?"

Let me declare a blatant self-interest up-front as a PD test equipment vendor before adding another test. On-line partial discharge testing of MV & higher motors (> 3 kV) is a good 'condition-based' maintenance test. 'Condition-based' is more appropriate than 'predictive' maintenance as one cannot predict from PD tests when the motor insulation will fail. It does enable you, however, to base your maintenance & off-line testing decisions on the insulation condition rather than on time, operating hrs, # of starts, etc.

Vince Green, p.Eng.
ADWEL International
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