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← TechnologyWhich electrical breakdown outcome occurs when high voltage transformer oil contains excessive moisture?
A)Increased dielectric constant, reducing stress
B)Arcing between windings, causing short circuit✓
C)Reduced transformer hum due to dampening
D)Accelerated core saturation limiting current
💡 Explanation
When transformer oil contains excessive moisture, its dielectric strength decreases because water is a polar molecule interfering with insulation properties, leading to easier electrical breakdown and arcing. Therefore, arcing between windings & short circuits results, rather than reduced stress, noise reduction, or core saturation, which require different conditions.
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