A 110kV line of 40km length is protected by impedance relay. The first stage of distance relay protects 85% of the line.

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A 110kV line of 40km length is protected by impedance relay. The first stage of distance relay protects 85% of the line.

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A 110kv Line Of 40km Length Is Protected By Impedance Relay The First Stage Of Distance Relay Protects 85 Of The Line 1
A 110kv Line Of 40km Length Is Protected By Impedance Relay The First Stage Of Distance Relay Protects 85 Of The Line 1 (51.41 KiB) Viewed 17 times
A 110kV line of 40km length is protected by impedance relay. The first stage of distance relay protects 85% of the line. The line has the impedance of ZL=0.24+J0.45 ohm/km, CT ratio 300/1A, PT ratio 100kV/100V Calculate the setting of impedance relay and hence draw the characteristic of the relay on R - X plane. Neglect the influence of arc resistance. 11:21
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