3 Comments to “Overhead system can be designed for operation up to____________?”

1. The answer provided is wrong here , The actual answer of this question is 400 KV because logically if both underground and overhead Transmission lines can handle the same voltage than why not make all the transmission lines underground instead of making them overhead (Which includes of danger of lightening etc too).So as overhead transmission lines can handle more voltage so they are usually preferred.

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   1. Thanks for correction. answer updated

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      1. you are right. The underground system can not be
         operated above 66 kV because of insulation difficulties
         but overhead system can be designed for operation up to
         400kV.

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