Short circuit fault as one of the characteristics of
transient disturbances in electric power systems that must be
addressed by the safety equipment. The increase at
occurrence of short circuit generates large electrical
currents and at a very low voltage. This research will address
the simulation of short circuit interruption in the 150 kV
transmission line system. The method is used to perform the
simulation with the help of PSCAD / EMTDC and PWS
(Power World Simulator) software’s to obtain the
characteristic of current and voltage on the 150 kV
transmission network system in South Sulawesi. This
discussion aims to examine the changes in current and
voltage during short circuit fault with or without fault
impedance and fault location distance. In this case, it will be taken case of short circuit between the air ducts with Bus PKEP to PPARE , For a distance fault of 22.5 km obtained
by the fault current from the bus PKEP biggest , while at a
distance of 66.5 km is acquired the fault current of the
largest from the bus PPARE, of four types of errors are
analyzed on the Z = 0 ohm is the largest short circuit
interruption occurs in three phase fault (LLL), while at Z =
10 ohm = 15 ohm Z of the biggest mistakes of the line short-
circuit line to ground faults (LLG