B1 Q.48 A symmetrical 3-phase short-circuit-occurs on the 22 kV bus bars of the circuit shownas a one-line diagram in the above figure. Calculate the fault current and the faultapparent power.11 kV/132 kV132 kV/22 kVLoadslelll25 MVA100 MVAx' = 0.15 p.u.5 MVA30 MVA x =0.092 p.u.x = 0.09 p.u.x = 0.02 p.u.

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Engineering

Electrical Engineering

B1

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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Concept explainers

KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.

Question

Q.48 A symmetrical 3-phase short-circuit-occurs on the 22 kV bus bars of the circuit shown
as a one-line diagram in the above figure. Calculate the fault current and the fault
apparent power.
11 kV/132 kV
132 kV/22 kV
Loads
lelll
25 MVA
100 MVA
x' = 0.15 p.u.
5 MVA
30 MVA x =0.092 p.u.
x = 0.09 p.u.
x = 0.02 p.u.

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