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← TechnologyWhich 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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