At the substation Garuda Sakti there are four power transformer units that is 2 units of 60 MVA and 50 MVA 2 units that supply power to the entire territory of Pekanbaru. Needed a reliable protection system to overcome the problems, including short circuit and overload disorders. The amount of short circuit current that may occur on an electrical system needs to be known before the actual disturbance occurred. Therefore it is necessary to set the relay overcurrent (OCR) is good so that the relay can protect electrical equipment from current short circuit or overload.Keyword : OCR
                        
                        
                        
                        
                            
                                Copyrights © 2017