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← TechnologyWhich risk increases when cascading circuit breakers in an industrial power distribution system experience a fault condition beyond the instantaneous trip threshold?
A)Selective coordination failure✓
B)Transformer core saturation
C)Increased eddy current losses
D)Harmonic resonance amplification
💡 Explanation
Because cascading breakers are intended to trip closest to the fault, coordination failure occurs when downstream breakers cannot clear the fault before the upstream breakers trip due to the fault exceeding instantaneous trip, therefore causing a larger outage rather than a localized one.
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