Study Koordinasi Setting Relai OCR dan GFR pada Penyulang Kedung Baruk di Gardu Induk Surabaya Selatan

Abstract

relay is a protection device that can detect abnormal currents in an electrical energy distribution system. If there is an abnormal current and it is detected by the relay, the relay will give a command to Power Breaker or Circuit Breaker (CB) to cut off the current in abnormal conditions so that the components or electrical distribution equipment are not damaged. In the Main Substation feeder there is protection, namely OCR (over current relay) and GFR (ground error relay). OCR is used to detect 3-phase overcurrent faults, while GFR is used to detect 1-phase overcurrent faults to the ground. The results of this study obtained TMS for the incoming OCR relay and feeder of 0.185 and 0.145. While in the incoming GFR relay and feeder of 0.235 and 0.111