![]() Nevertheless if it were a critical motor at our plant I would ask for reading to be investigated or repeated. Likelihood of a motor problem (vs test equipment problem) seems very low. I tend to feel good about the motor based on the satisfactory current unbalance. want accuracy a small number compared to resistance) or from remote location thru cables)Ģ - What type of measurement equipment was used? Was it a 4-wire measurement? What is the stated accuracy of the instruement? What is the winding resistance reading in milliohm (so we can compare accuracy to reading. What effects would I see with a resistive imbalance of say 5 to 10%? Should I push for more troubleshooting? I would suspect an error in winding resistance measurement associated with measurement conditions or equipmentġ - Where was resistance measured from? (directly at motor terminals. Mangegemnf decided to start the motor without further troubleshooting. I have a 480v 3 phase induction motor with 5 to 8% phase to phase resistive imbalance. ![]()
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