The Dewantara Feeder of the Prabumulih Substation is a 20 kV distribution network of PT. PLN (Persero) UP3 Ogan Ilir with a medium-voltage overhead line (SUTM) extending 152.37 km, which experiences voltage drops and power losses exceeding the standard limits when delivering energy to customers. This study aims to analyze the reduction of power losses and voltage drops under existing conditions…