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Why Can't High-voltage Wires be Buried Underground?

Jul. 12, 2019

High Voltage Power Cable Supplier tells you that although it is a reinforced iron, the high-voltage wire is not as strong as you think. A super typhoon can make the grid scarred.

Then why can't the high-voltage wires be buried underground like underground cables in the city? This way, you can't do it once and for all. How many typhoons are not afraid?

At present, ultra-high voltage transmission cannot find an effective insulation material to make the outer insulation layer of the wire. Therefore, the ultra-high voltage electric wires are bare and cannot be buried underground.

There is a distributed capacitance around the wire, through which current can leak out, which increases the consumption on the one hand; on the other hand, if any animal is close, there is a danger of electric shock.

Air is an insulator, but the earth is a conductor. In the air, as long as the wire is directly placed there, but in the underground, you need to add a layer of insulating shell outside the wire, otherwise the power in the wire does not go far, the leakage will leak little.

Insulated Power Cable

Underground cables are more complex than overhead lines, have high technical requirements, are difficult to manufacture and construct, and are buried in the ground. It is not easy to find faults, and it is difficult to repair and maintain.

In general, the cost of underground cables of the same voltage level will be several times or even tens of times higher than that of the high-voltage lines in the air.

To sum up, the high-voltage line is buried underground, which has both security and economic problems.

For more information on Insulated Power Cable, please follow our website, https://www.hy-cables.com/



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