Studi Pengaruh Pembebanan sebagai Dasar Scheduling Maintenance untuk Meminimalisir Susut Umur Transformator 1 GI Blimbing

Abstract

Transformer 1’s load in Blimbing Substation has increased significantly each year. In 2016 until 2018 the load onTransformer 1 was 33.81%, 43.53%, and 71.75%. The amount of this transformer’s load will affect the hot spot temparature. Hot spottemperature is also affected by environmental temperature. In this study, load curve method was used then followed by calculate theloss life of transformer. From the calculation, known that the higher of hot spot temperature, the higher impact to loss life of transformertoo. In 2018, the highest loading data was on November and it was obtained loss life of transformers by 0.649% per month, so it isestimated that this Transformer 1 at Blimbing Substation has a lifespan of 30 years 9 months. According to IEC 60076-7 normal life oftransformers with loading under nominal is 20.55 years or 180000 hours. To minimize loss life of transformer or in other words extendthe life time of transformer can be done by scheduling maintenance. Scheduling maintenance is the activity which monitoring the maintransmission material on scheduled and provided a treatment based on the monitoring results. It can be concluded that the lifespan ofTransformer 1 at Blimbing Substation can exceed the specified standard. The one of factors that affect this, is scheduling maintenance.