A 3-phase induction motor delta connected is carrying too heavy load and one of its fuses blows out. Then the motor______________?
Correct answer: C. will stop and carry heavy current causing permanent damage to its winding
- A. will continue running burning its one phase
- B. will continue running burning its two phase
- C. will stop and carry heavy current causing permanent damage to its winding
- D. will continue running without any harm to the winding
Explanation
Opening one fuse in a heavily loaded delta motor causes single-phasing and an unbalanced current distribution. The motor may stall while drawing excessive current, which can permanently damage its windings.
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