Which outcome is most likely if inductive load switching causes exceeding voltage transients across a circuit breaker’s contacts?

A)Dielectric breakdown and arc restrike✓

B)Mechanical wear of the tripping mechanism

C)Increased eddy current losses in the core

D)Overheating of the conductor insulation

💡 Explanation

When switching inductive loads, exceeding voltage transients can cause dielectric breakdown as insulation is unable to withstand surges. Restrike occurs as the breaker attempts to interrupt. Therefore arc restrike is most likely, exceeding mechanical trip wear, core losses, or insulation heating, which have alternative causes.

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Which outcome is most likely if inductive load switching causes exceeding voltage transients across a circuit breaker’s contacts?

💡 Explanation

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