Protection Engineering Basics and Schemes Protection Engineering | Page 95

Chapter 4 Symmetrical and Unsymmetrical Faults
4.1 Short Circuit Faults:
The magnitude of short circuit current either maximum
or minimum value in three phase AC system is depend
upon the configuration of network,
Short circuit faults categorize in 4 types




Symmetrical three phase
Phase to ground
Phase to phase
Phase to phase to ground
4.2 Symmetrical three phase Fault:
Please see below figure
Where,
pg. 95