Circuit Breaker and Over Current Relay Implementation using MATLB Simulink

The over-current protection relay is that the most extensively used part to safeguard power systems from the prejudicious effects of faults. Wrong settings in overcurrent relay parameters will cause false tripping or maybe bypassing fault conditions which might cause a catastrophe. Thus it's vital to validate the settings of power protection instrumentality and to verify its performance once subject to completely different fault conditions. Circuit breaker and relays square measure being utilized for secure, reliable and convenient operation of installation. The over current protection relay is wide employed in the facility system for cover of tangency or wrong setting of system to the pre-specified price. Inaccurate setting of over current relay within the installation it's tough to send the trip signal. Therefore it's connected fastidiously within the installation. Thus it's vital to accredit the setting of power protection instrumentality. The strategy represents the modeling of over current relay in MATLAB/SIMULINK. The over current relay has the categories of fast, definite time, inverse time and inverse definite minimum time (IDMT) in keeping with the time characteristics. This technique most vital feature is that the comparison of times between ideal & calculated results of over current relay. To form the protection system of line by the electrical circuit breaker and over current relay in MATLAB/SIMULINK. To correct transmit the electrical power from causing finish to receiving finish while not full of any issue and dangerous condition. Implementation of over current relay and testing of electrical fuse & over current relay square measure mistreatment in MATLAB package. And show the results of in operation & fault current and additionally trip signal time of the over current relay.