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What causes power black-outs in rainy days in electrical engineering perspective?
Wiki User
∙ 14y ago
Many things cause faults, which are the cause of blackouts. A fault occurs when the dielectric isolation of a high voltage power line to ground, or to other phases is compromised, allowing current to flow between phases or to ground.
In rainy conditions, this most likely occurs due to either high winds blowing conductors into each other (phase to phase faults, this would be known as galloping), or lightning, which causes molecules in air to line up, which reduces the dielectric strength of air and usually results in phase to ground faults.
On lower voltage linesit is likely trees may make contact with a line (due to wind), which could cause faults requiring fuses to operate. Fuses are one time use devices, thus these sort of outages often require more time.
Wiki User
∙ 14y ago
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