To find the short time rating (STR) of all equipment’s, (Transformers, cables, Transmission lines, generator, motor, circuit breaker, switchgear as part of our short circuit study, we aim to identify the maximum fault current possible.
To find out the Breaking, Making and DC breaking requirements of interrupting equipment’s.
To find voltage raise during the fault.Fault cannot prevented, we can attempt to mitigate to certain extend and contain their potential damaging effects.
STANDARDS FOR SHORT CIRCUIT STUDY:
IEC 60909 (2016) – Short circuit in Three phase AC system (Grid connected)
IEC 61363 (1998) – Short circuit calculation procedure for Three phase AC isolated system
IEEE 3002.3 (2018) – Recommended practice for Calculation of short circuit current for Industrial and commercial power system.