A distance offset mho relay used amplitude comparator using current transformer (CT) with ratio of 5000/1 and voltage transformer (VT) with ratio 1200/1. The relay having circuit impedance of ZR = 20245° ohms and ratio of transformer turns of 0.4. Calculate the reach distance of the relay when line impedance is 0.5/80° ohms per phase per kilometer. a. An arching short circuit fault occurs at 10.2 km anywhere on the line, calculate the maximum portion of the line that can be protected. a.
A distance offset mho relay used amplitude comparator using current transformer (CT) with ratio of 5000/1 and voltage transformer (VT) with ratio 1200/1. The relay having circuit impedance of ZR = 20245° ohms and ratio of transformer turns of 0.4. Calculate the reach distance of the relay when line impedance is 0.5/80° ohms per phase per kilometer. a. An arching short circuit fault occurs at 10.2 km anywhere on the line, calculate the maximum portion of the line that can be protected. a.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Transcribed Image Text:A distance offset mho relay used amplitude comparator using current transformer (CT)
with ratio of 5000/1 and voltage transformer (VT) with ratio 1200/1. The relay having
circuit impedance of ZR = 20245° ohms and ratio of transformer turns of 0.4.
Calculate the reach distance of the relay when line impedance is 0.5/80° ohms per
phase per kilometer.
a.
An arching short circuit fault occurs at 10.2 km anywhere on the line, calculate the
maximum portion of the line that can be protected.
a.
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