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← TechnologyWhich outcome occurs when ice storm loading surpasses the capacity of a three-phase distribution transformer’s pole-mounted circuit breaker?
A)Cascading breaker trip-out occurs✓
B)Transformer windings short-circuit immediately
C)Line frequency spontaneously doubles
D)Arc flash events are eliminated
💡 Explanation
Cascading breaker trip-out follows overload because the circuit OVERCURRENT PROTECTION trips upstream breakers progressively, therefore isolating sustained faults, rather than immediate winding failure, and affecting adjacent regions rather than localized issues.
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