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← TechnologyWhich outcome occurs when a large industrial motor overheats coincident with brief power interruption, leading to breaker trip?
A)Sequential tripping of upstream breakers✓
B)Harmonic resonance in grid capacitors
C)Over-compensation by automatic voltage regulator
D)Delayed reclosure due to anti-pumping
💡 Explanation
The heated motor draws locked-rotor current, exacerbated by simultaneous restarts after brief power loss; because inverse-time characteristics of breakers mean that the downstream breaker may fail to trip faster than its upstream cousin during sudden high-current inrush situations, therefore potentially leading to cascading failures, rather than local shutdowns.
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