A three-phase motor has seriously unbalanced currents. What should be checked before increasing overload settings?
- ARaise settings until tripping stops
- Voltage, load, and motor condition
- CRemove one phase
- DDisconnect equipment grounding
Why B is correct
Imbalance may indicate voltage imbalance, a high-resistance connection, mechanical load trouble, or winding damage. Raising protection masks the symptom and can permit destructive overheating.