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← TechnologyWhich risk increases, following switchgear maintenance, if a 3-phase circuit breaker reclosing sequence is misconfigured?
A)Sympathetic inrush current surges✓
B)Increased transmission line corona
C)Transformer core saturation
D)Elevated dielectric breakdown probability
💡 Explanation
Sympathetic inrush occurs because slightly offset reclosing during energization causes differential flux buildup, therefore creating severe overcurrent stress rather than intended synchronous reconnection, and rather than other dielectric or voltage concerns.
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