Electrical Engineering · Induction Motors Troubleshooting
A 3-phase induction motor starts normally when connected to the supply, but runs at a speed lower than normal under load. What is the most probable cause of this fault?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Blockage in ventilation ducts
- 2Incorrect fuse rating
- 3The rotor shaft is completely locked
- 4The supply frequency is lower than the rated supply frequency✓
Correct answer
The supply frequency is lower than the rated supply frequency
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