Which risk increases when rapidly switching a high-voltage inductive circuit with a mechanical circuit breaker?

A)Transient voltage spike across the breaker✓

B)Increased eddy current losses in the core

C)Harmonic distortion of the current waveform

D)Dielectric breakdown due to cable heating

💡 Explanation

When interrupting an inductive circuit rapidly, the decaying current causes a large back EMF because inductance resists changes in current, leading to a voltage spike. Therefore, a transient voltage spike appears across the breaker, rather than core losses, distortion, or cable breakdown which involve different time-dependent mechanisms.

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Which risk increases when rapidly switching a high-voltage inductive circuit with a mechanical circuit breaker?

💡 Explanation

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