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Which protective action occurs when a DC circuit experiences sustained overcurrent?

A)Circuit rapidly shuts down
B)Frequency modulation increases linearly
C)Voltage regulation instantly improves
D)Harmonic distortion becomes negligible

💡 Explanation

Sustained overcurrent triggers the short circuit protection mechanism, abruptly tripping the circuit. This is because the increased current heats the breaker's thermal element, therefore the device isolates rapidly, rather than sustain arcing.

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