Electrical Engineering · AC Motors
If an industrial 3-phase induction motor frequently trips on thermal overload due to excessive temperature rise, which maintenance action should be taken first?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Changing the grade of bearing grease
- 2Replacing external power terminal connectors
- 3Cleaning blocked cooling ducts and air ventilation passages✓
- 4Adjusting the incoming supply frequency
Correct answer
Cleaning blocked cooling ducts and air ventilation passages
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