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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.
Posted: Sun Jul 03, 2022 12:11 pm
by answerhappygod
- A 110kv Line Of 40km Length Is Protected By Impedance Relay The First Stage Of Distance Relay Protects 85 Of The Line 1 (22.59 KiB) Viewed 23 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 Z₁-0.24+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 RX plane. Neglect the influence of arc resistance.