Design and Implementation of Overcurrent Relay to Protect the Transmission Line

Power system is prone to faults, because of disoperation of the system or by the natural disasters. This may be caused with damage the components of power system leading to great tasked for their subrogation and cutting the power supply to customers. In this period, much power is exhausted and this stipulation is increasingly transmitted by using transmission line, from one side or place to another side. Different kinds fault may occur in these transmission lines. The major purpose of this article is to analysis and studies the different faults and also declares the impact on transmission line. This work is approach to MATLAB/SIMULINK package. In this work we connect a 100Km terco type and the various cases of fault types are studied where over current relays (OCRs) are used in this work.