The paper presents a PROTEUS model of Micro controller based Over current and Differential Relay. The relay can be used to sense faults in transmission line based on analog to digital conversion of the 3-phase current and simultaneously issuing a trip signal if the actual line current is greater than set reference value. The proposed model can also be implemented as Differential relay, which often find their application in transformers protection. The model uses various analog devices for conversion purposes and displays the current values as sensed by the micro controller.
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Author Name: HARSH DHIMAN
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Keywords: ADC, Differential Relay, Embedded C Programming, I to V converter, PIC Microcontroller.