Which risk increases when rapidly cycling a large industrial motor's feeder circuit breaker?

A)Premature contact wear outgassing✓

B)Increased core saturation thermal runaway

C)Elevated eddy current harmonics oscillations

D)Augmented skin effect leakage inductance

💡 Explanation

Rapid breaker cycling accelerates contact wear via increased arcing during interrupting currents, because the mechanism of contact erosion dominates. Therefore, contact wear increases, rather than core saturation or skin effect, stemming from magnetic field changes in the motor itself.

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Which risk increases when rapidly cycling a large industrial motor's feeder circuit breaker?

💡 Explanation

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