APDA ERIANSYAH; PARLIN SIAGIAN; RAHMANIAR, R. 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, [S. l.], v. 16, n. 02, p. 250–257, 2026. Disponível em: https://ejournal.seaninstitute.or.id/index.php/InfoSains/article/view/8413. Acesso em: 25 aug. 2026.