transmission cable of Koto Panjang to Garuda Sakti Pekanbaru in March 2014. This research was conducted with an experimental method and its aim was to analyze the power losses in the transmission cable. Conductors used in the highvoltage transmission line was ACSR (Aluminium Conductor Steel Reinforced) which consisted of a mixture of aluminum and steel with a diameter of 28.71 mm. Results …