Apda Eriansyah, Parlin Siagian, & Rahmaniar, R. (2026). Performance Study of OCR (Over Current Relay) and GFR (Ground Fault Relay) Relays as Protection In 20 Kv Cubicles in Selayang GH PT. PLN UP2D North Sumatra. Jurnal Info Sains : Informatika Dan Sains, 16(02), 250–257. Retrieved from https://ejournal.seaninstitute.or.id/index.php/InfoSains/article/view/8413