Physics · Electrical Power Systems
If a single-phase preventer trips frequently in a three-phase motor, what is the most likely cause?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The single-phase prevention relay is completely de-energized
- 2Abnormal fluctuations or unbalance in phase voltage✓
- 3Slightly low nominal supply voltage
- 4Improper phase sequence
Correct answer
Abnormal fluctuations or unbalance in phase voltage
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