<![CDATA[The background of this research is an analysis of equipment disturbances that occur in the process of distributing electrical energy. Where the direct impact felt as a result of the disturbance is blackout. Power outages cause a decrease in continuity of service to customers and result in a lot of loss of electrical energy that is not distributed to customers. The research objectives are to find out the optimization technique of distibution network maintenance, how to reduce the value of energy not supplied (ENS), find out the losses due to ENS and find out the total electrical energy distributed after preventive maintenance is carried out. This research uses a preventive maintenance method, which is maintenance that can prevent unexpected damage to distribution system networks and equipment. This research resulted in the optimization of preventive maintenance actions in the form of a reduction in disturbances after preventive maintenance from 7 disturbances in February to 2 disturbances in March. Before preventive maintenance was carried out, the loss due to ENS amounted to Rp. 36,192,017.626 and the total electrical energy that was not distributed was 25,025.76 kWh. After preventive maintenance was carried out, there was a significant decrease in the total loss due to ENS of Rp. 953,516,447 and the amount of electrical energy that was not distributed was 659.28 kWh. This research can increase maintenance efficiency due to electrical energy losses by 97.36% at the time interval when this research data is managed when data collection is carried out in the field.]]>
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