| Summary: | High voltage testing aims to investigate the electrical properties of dielectric insulation system on the quality of power equipment, the quality checking equipment installed before or after operation, to avoid any harm to the user and reduce losses during equipment maintenance. It required a variety of testing tools that should be able to withstand high voltages during the test, one of which is an insulator made from purified water. This study aims to determine how the effect of the distance between the electrodes and different types of electrodes on the insulating ability of pure water, pure water insulator character when worn and the impulse voltage capability of pure water in the hold insulator leakage current DC and AC leakage current. The study begins by measuring the resistance of the insulator pure water with the distance between the electrodes and the effect of different types of electrodes to know how much voltage that can be worn during the test . Testing is done by impulse test voltage of 66.88 kV with a variable distance between the electrodes until an arc. Further testing of leakage current with DC and AC voltage applied is equal to 1 kV, 2 kV, 3 kV and 5 kV and each test performed 3 times with a duration of 5 seconds. Based on the test results are known insulator pure water is able to withstand the impulse voltage to 66.88 kV voltage is affected by the shape of the tip electrode surface and the distance between the electrodes. In testing the DC leakage current, electrolysis reactions that cause deterioration of insulation quality pure water and is also affected by the cross-sectional area electrodes. Where the greater cross-sectional area, the greater the electrode DC leakage current can flow. While in testing AC leakage current, the type of the electrode affects the current flow due to the large precipitate formed.
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