Draw the per-unit impedance diagram of the network shown in Fig. 1, calculated to a common base of 50 MVA. Determine: (i) (ii) The rms fault current (in kA) and the fault level (in MVA) for a three-phase symmetrical short- circuit fault at bus no. 4. The rms fault current (in kA) and the fault level (in MVA) for a three-phase symmetrical short- circuit fault at bus no. 5. T₁ 132kV/33kV 50 MVA X=0.15 pu bus 1 1600 MVA Fault Level bus 2 40 km OHL X=0.4 2/km T3 T₂ 132kV/33kV 50 MVA X=0.15 pu 30 km OHL X=0.42/km bus 3 Cable j2.20 bus 4 33kV/11KV 15 MVA X=0.1 pu bus 5 Cable j2.5 Ω Figure 1 T4 33kV/11KV 12 MVA X=0.12 pu bus 6

Draw the per-unit impedance diagram of the network shown in Fig. 1, calculated to a common base of 50 MVA. Determine: (i) (ii) The rms fault current (in kA) and the fault level (in MVA) for a three-phase symmetrical short- circuit fault at bus no. 4. The rms fault current (in kA) and the fault level (in MVA) for a three-phase symmetrical short- circuit fault at bus no. 5. T₁ 132kV/33kV 50 MVA X=0.15 pu bus 1 1600 MVA Fault Level bus 2 40 km OHL X=0.4 2/km T3 T₂ 132kV/33kV 50 MVA X=0.15 pu 30 km OHL X=0.42/km bus 3 Cable j2.20 bus 4 33kV/11KV 15 MVA X=0.1 pu bus 5 Cable j2.5 Ω Figure 1 T4 33kV/11KV 12 MVA X=0.12 pu bus 6

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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