The design of a protection scheme is of paramount
importance. This is to ensure that the system should operate
under all required fault conditions, and refrain from operating
when so required. The major requirements on the protection
relays are selectivity, stability, speed, sensitivity and
reliability. Fault current is an important parameter which is
influence of earthing system and shall have an impact on
protection parameterization and performance in order to
minimise and/or prevent the damage of the power system
equipment under fault conditions. The magnitude of the fault
current depends on system earthing such as operation and
protective earthing and type of faults that occurs in terms of
short circuit, open circuit or both