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Which consequence results when reclosing circuit breakers after a temporary fault on a long transmission line?

A)Increased dielectric stress on equipment
B)Harmonic resonance throughout connected loads
C)Reduced system inertia and stability
D)Transformer core saturation due to DC offset

💡 Explanation

High voltage can get trapped on the line. Because the trapped voltage with source behind makes a larger differential, the increased dielectric stress mechanism threatens transformer lifetime; therefore, electrical arcing surges occur, rather than harmonics which are a consequence of nonlinear loads.

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