Evolution of Elements on Electrode Surfaces in Gas-Insulated Systems under Electrical Heating

Accidents always occur in gas-insulated switchgears (GIS) and lines (GIL) since filmed joint electrodes are produced when internal gases react with the electrode’s surface there is a discharge or electricals overheat. To solve problem, this paper analyzed evolution of elements on contact electrode. The reaction SF6 under breakdown currents overheating conditions was obtained, time current effects upon transfer element were proposed. It found that mobility F typically increases after electrical heating. number interruptions short-circuit important factors affecting to flashover essential factor accelerates insulating materials. Frequent switching main contact. also Al has little correlations breaking process, metal fluorides become components research provides theoretical basis data support for GIS/GIL optimization treatments improvement fault detection methods.