Developing norm for SF6 quality of tropical GIS

The climate of Indonesia is almost entirely tropical. The uniformly warm waters that make up 81 % of Indonesia's area ensure that temperatures on land remain fairly constant, with the coastal plains averaging 28°C, the inland and mountain areas averaging 26 °C, and the higher mountain regions, 23 °C. It is huge difference between tropical weather compared to subtropical weather conditions. To identify the level of SF6 quality we use SF6 gas norm of the restriction of range value CIGRE. Data obtained from the test results over five years by using 30 samples. The method used used to obtain norm is a statistical method.