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← TechnologyWhich risk increases when reclosing a circuit breaker onto a faulted three-phase power distribution line?
A)Transient voltage amplification occurs
B)Arc flash intensity increases✓
C)Relay miscoordination chance rises
D)Insulation degradation accelerates sharply
💡 Explanation
Arc flash intensity increases because reclosing feeds fault current into an established arc; the increased energy release drives escalation, therefore higher risk of equipment damage and injury, rather than gradual insulation wear or voltage amplification.
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