Analysis of overcurrent relay for transmission line protection

Overcurrent relays are used for protection of lines, transformer, generators, and motors. Generators and load are connected together through transmission lines, which transport electric power from the place where it is generated to the place where it is used. By doing the analysis and testing, overcurrent relay may protect the power system and deal with any abnormality of a system which involves the electrical failure of the equipment. The role of protective relays in a power system is to detect systems abnormalities and to execute appropriate commands to isolate swiftly at the faulty component from healthy system. The analyze overcurrent relay protection was carried out at Pencawang Masuk Utama (PMU) SEGARI (SGRI) and SUNGAI SIPUT (SSPT).