25-08-2017, 09:32 PM
Abstracts: A MICRO CONTROLLER BASED OVER CURRENT CONTROL RELAY will be designed and developed as a project work. An "Over Current Relay" is a type of protective relay which operates when the load current exceeds a pre-set value. In a typical application the over current relay is used for over current protection, connected to a current transformer and calibrated to operate at or above a specific current level. This project will attempt to design and fabricate over current protection Relay using PIC micro controller. The PIC micro controller will cause the circuit breaker to trip when the current from load current reaches the setting value in the PIC micro controller. In order to design it, first the load current need to measure in order to monitor it using current sensor including testing the fault (over current) and when such condition arise, it will isolate in the shortest time possible without harming the any other electrical devices. It will also including in developing the algorithm for instantaneous over current relay for the circuit breaker to trip. In this project, PIC micro controller will be used to control and operate the tripping coil in circuit breaker.