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MegohmmeterModels6501/6503
Figure4-9showsthewindingsofathree-phasemotorseparated.
Sometimesthiscanbedoneattheleadterminalswhileothertimes
theendbellsmustberemovedtogetattheleadwiresofthecoils.
By connecting the megohmmeter as shown, the phase insulation
resistancevaluecannowbedetermined.Readbetweenphases“A”
and“B”,then“B”and“C”,then“C”and“A”.