Sulfur hexafluoride (SF6) gas is widely used in electric power equipment because of its good insulation and arc extinguishing properties. However, SF6 is a strong greenhouse gas. Therefore, it is very necessary and urgent to search for environmentally-friendly alternatives to SF6. In recent years, various new environmental-friendly gases and the mixed gases has gained attention as potential alternative SF6 gases. Particularly, this paper puts forward the HFO-1336mzz(E) gas as an insulating medium for application in electric power equipment. First, in view of the problem of easy liquefaction of such gas, combined with experimentally measured saturated vapor pressure data, the Antoine equation and the gas-liquid equilibrium law are used to analyse the saturated vapor pressure characteristics of HFO-1336mzz(E)/N2 mixed gas. Secondly, gap breakdown experiments under dc voltage are carried out under different pressures to evaluate the insulation performance of HFO-1336mzz(E)/N2 mixed gas. The experimental results show that the breakdown voltage increases almost linearly with the increase of gas pressure. The research results provide a theoretical basis and technical guidance for its application in power equipment.
 

Breakdown,Insulation,Enviromental-friendly,HFO-1336mzz(E)