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Question

 For a fully transposed transmission line________. 

A.

Negative and zero sequence impedances are equal. 

B.

Positive and zero sequence impedances are equal 

C.

Positive, negative and zero sequence impedances are equal. 

D.

Positive and negative sequence impedances are equal.

Answer ( Option D)

Positive and negative sequence impedances are equal.

Solution

For a fully transposed transmission line positive and negative sequence impedance are equal. 

Zero sequence impedance much larger than the positive (or negative) sequence impedance of transmission lines (It is approximately 2.5 times)

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