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Utilizing Quadcopter were still many obstacles such as; plane easy to fall; the battery was not durable; vulnerable to weather conditions and others. The research and development have grown to improve aircraft facilities and capabilities. Many parameters related to aircraft lift capability factors; fly long; flying high; type of motor; the type of propeller: including the sensors and control systems used. This study was to find the relationship between changes in the BLDC motor voltage source to the rotor angle velocity (ω); rotor speed of the rotor lift (Ft); wind speed to rotor lift; push the following rotor (Ct). Empirical testing was conducted in the laboratory to find the relationship of these parameters. The results data show that; the lift power generated with rotational speed was not proportional, non-linearity occurs when the rotor was released from the self and starts pulling the strain gauge when the rotation speed reaches around 65 rps. Once the rotation speed of the rotor is able to reach up to 1.5 Newton lift, then the thrust rising trend sharply increasing in increasing of the rotor speed. A motorist had 1200 KV and blade with a radius of 0.12 m, then obtained thrust (Ct) of 1. 732.

Transformer has an important role in the world of electricity, especially high voltage. The selection of transformer isolation and routine maintenance should be in the same direction to maintain the reliability of transformer performance and work safety. Partial discharge is caused by many factors, both from the transformer itself, breakdown voltage and the use of an old transformer. The external factor is the temperature around the transformer which results in a decrease in the reliability of the insulator. Both must be based on a standard. As technology advances, in the field of electrical, electronics, computerization has a standard called IEEE Std C57.104 ™ -2008 which is a revision of IEEE Std C57.104-1991. It is designed for science and technology guidance concerning all provisions concerning the security of the worker itself. Which later, by applying the standard is expected transformer service users can suppress loss of production and work accidents. Indication of occurrence of Partial discharge (PD) occurs in transformer at MCC CLO2 (transformer 1) where TDCG 25975 ppm and transformer EN-2M also occur Partial Discharge (transformer 2) with TDCG 5920.6 ppm, while at transformer VE-12 (transformer 3) is still in normal condition where the TDCG value is only 630 ppm. If the Partial Discharge is fatal and damaging the transformer, replacement of the transformer should be done immediately. But the condition of the field not be done directly because of many stages to be done, which directly affect the production process and costs.