Which risk notably increases when a single fuse blows in a three-phase induction motor circuit?

A)Increased motor vibration and bearing wear✓

B)Complete failure and catastrophic winding damage

C)Reduced power factor due to unbalanced load

D)Overvoltage stress on the remaining fuses

💡 Explanation

When one fuse blows (single-phasing), the motor continues operating on the remaining two phases, generating an elliptical rotating magnetic field because of imbalanced currents which leads to vibration. Therefore, increased motor vibration and bearing wear results, rather than complete failure, power factor reduction, or overvoltage depending on load and protection schemes.

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Which risk notably increases when a single fuse blows in a three-phase induction motor circuit?

💡 Explanation

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