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Zero Sequence Imp (ZSI) of Transmission Line
2

Zero Sequence Imp (ZSI) of Transmission Line

Zero Sequence Imp (ZSI) of Transmission Line

(OP)
Test setup for measuring zero sequence impedance of a line is to short all three phases and then measure the loop impedance between shorted conductors and earth return.Question I have is that ,do we we need to multiply measured ohmic value by three to get actual zero sequence impedance?

RE: Zero Sequence Imp (ZSI) of Transmission Line

2
That is correct.  The measurement gives Zo/3, so you multiply the value by 3 to get the actual Zo value of the line.

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