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← TechnologyWhich failure is more probable when a high-voltage direct current (HVDC) transmission line accumulates ice?
A)Arcing and flashover events increase✓
B)Conductor sag reaches ground limits
C)Insulator string tensile strength failure
D)Transformer core saturation intensifies
💡 Explanation
Arcing rises with surface contamination of insulators because the reduced dielectric strength causes surface discharges during high-voltage operation due to ice bridging the insulation. Therefore, surface flashover increases rather than primary tensile failure, given reasonable design thresholds.
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