Application problems of SF_6/N_2 mixtures to gas insulated bus

摘要

Gas insulated bus (GIB) using SF_6 gas has widely been applied in the world, because it has the advantages in reliability and in minimizing installation space. However SF_6 is identified as a potent greenhouse gas and thus the efforts in preventing the release of SF_6 in the environment, the study on recycling SF_6 and the research for alternative gas are now being performed~1. In designing a GIB using alternative gas, there are many application problems such as a selection of alternative gas and its rated pressure to maintain the required dielecdtrtic and heat transfer performance. The problems on recycling SF_6 are also essential in applying alternative gas using SF_6 such as SF_6/N_2 mixtures.