I need the answer quickly 12.8 The 60 mile, 115 kV line GH (Figure P12.8) is operating with thevoltages at each end 30° out of phase when a three-phase fault occursat 80% of the distance from bus G. This fault has 12 arc resist-ance. The currents flowing to the fault are as shown and are in perunit at 100 MVA, 115 kV.GZ = 0.365 ZB3°%3D80%Line to Hla= 1.96 Z-31.42°4-2.60 2-47.76°ZR%3Dz Load-4.51 L-40.68°ZxAll values in per unit on 100 MVA, 115 kV.FIGURE P12.8(b)FIGURE 6.13 Distance relay charactenstics on the R-X diagram: (a) impedance;(b) mho; (e) offset mhos; (d) lens; (e) simple blinders; () reactance.a. Determine the apparent impedance seen by the distance relays atG for this fault.b. Determine if the zone I mho unit at G set for 90% of the line GHcan operate on this fault. Assume that the angle of the mhocharacteristic Tigurc 6.12b) is 75°. +Fig. 6.13bc. Determine the apparent impedance seen by the distance relays atH for this fault.

Answered: Image /qna-images/answer/e5b11a67-53ac-4159-9c90-ca77f97988e9.jpg

12.8 The 60 mile, 115 kV line GH (Figure P12.8) is operating with the voltages at each end 30° out of phase when a three-phase fault occurs at 80% of the distance from bus G. This fault has 12 arc resist- ance. The currents flowing to the fault are as shown and are in per unit at 100 MVA, 115 kV. Z, = 0.365 Z83° - 80% Line to H a=1.96 L-31.42 4-2.60 2-47.76° ZA z Load 4- 4.51 L-40.68° All values in per unit on 100 MVA, 115 kV. FIGURE P12.8 (b) FIGURE 6.13 Distance relay characteristics on the R-X diagram: (a) impedance; (b) mho; (e) offset mhos; (d) lens; (e) simple blinders: () reactance. a. Determine the apparent impedance seen by the distance relays at G for this fault. b. Determine if the zone 1 mho unit at G set for 90% of the line GH can operate on this fault. Assume that the angle of the mho characteristic Tigure 6.12b) is 75°. + Fig. 6.13b c. Detemine the apparent impedance seen by the distance relays at H for this fault.

12.8 The 60 mile, 115 kV line GH (Figure P12.8) is operating with the voltages at each end 30° out of phase when a three-phase fault occurs at 80% of the distance from bus G. This fault has 12 arc resist- ance. The currents flowing to the fault are as shown and are in per unit at 100 MVA, 115 kV. Z, = 0.365 Z83° - 80% Line to H a=1.96 L-31.42 4-2.60 2-47.76° ZA z Load 4- 4.51 L-40.68° All values in per unit on 100 MVA, 115 kV. FIGURE P12.8 (b) FIGURE 6.13 Distance relay characteristics on the R-X diagram: (a) impedance; (b) mho; (e) offset mhos; (d) lens; (e) simple blinders: () reactance. a. Determine the apparent impedance seen by the distance relays at G for this fault. b. Determine if the zone 1 mho unit at G set for 90% of the line GH can operate on this fault. Assume that the angle of the mho characteristic Tigure 6.12b) is 75°. + Fig. 6.13b c. Detemine the apparent impedance seen by the distance relays at H for this fault.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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