Abstract  The Kenten substation is part of the unitary distribution of electricity transmission where there are equipment such as switchgear, transformers, protection equipment, and control equipment. The Kenten substation functions as a receiver for supply from high voltage to the distribution medium voltage system to be distributed to consumers. An electric power system can experience disturbances from inside or outside the substation, including damage to the generator, broken conductors, short circuit disturbances due to lightning strikes. Therefore, the electric power system has safety equipment to secure the equipment from interference and avoid damage. With the protection system does not hinder the distribution of electric power to the load. Based on the data received, there have been several disturbances to the feeder, including in March 2021 there has been a short-circuit fault in the volvo feeder in the electrical system of PT. PLN (Persero) substation Kenten UPT Palembang Short-circuit faults of these phases can result in a transformer that results in blackouts throughout the feeder connected to the transformer. Disturbances that occur in the electrical system of the Kenten Substation, especially in this feeder, make the OCR protection system on the feeder work to protect the equipment at the substation from damage.

The first battery is DMA 60B24R, the second battery is NS60 / 46B24R 370CCA and the third battery is 46B24R / NS 60. When emptying the battery for 6 hours, the current and voltage values of the battery quickly run during 6 hours of discharge, the first battery voltage, current 0, the second battery 6 hours there is no residual voltage, current. While what remains emptying with time for 6 hours is a third batteries with a voltage value of 2 Volts, 10 A current. When charging a battery with a time varies of 2 hours, 4 hours and 6 hours, the first battery for 6 hours voltage 14 Volts and current of 46 A. The second battery with a time of 6 hours voltage of 13 Volts, current 45 A. The fast charging battery is the third takes 4 hours of charging 13 Volts of voltage, current 45 A. The third battery is very good to use for electric cars because when emptying for 6 hours there is still voltage and residual current in the battery, when charging only takes 4 hours it will affect the travel time and mileage in accordance with the purpose when driving electric car.