The 20 kV distribution system at the Keramasan Substation, especially at the Bali feeder, often experiences short circuit disturbances due to external factors, which can cause blackouts and reduce the reliability of the feeder. Therefore, the author discusses the coordination of the overcurrent relay (OCR) and recloser on the Bali feeder connected to the 70/20 kV Transformer II of the Keramasan…