Title :
GIS disconnector model performance with SF6/N2 mixtures
Author_Institution :
Schneider Electr., France
Abstract :
The lightning impulse breakdown voltage of a model, 145 kV GIS disconnector was studied using SF6/N2 mixtures. Mixtures with between 0% and 15% SF6 were used. Sphere-sphere, point-plane and sphere-rod geometries were studied. In most cases, breakdown strength increased with both SF6 content and pressure. In the case of surface flashover, a pressure of about 8 bar with 15% SF6, gave roughly equivalent results to that of 4 bar pure SF6
Keywords :
gas insulated switchgear; 145 kV; 4 bar; 8 bar; GIS disconnector model performance; SF6-N2; SF6/N2 mixtures; breakdown strength; gas-insulated switchgear; lightning impulse breakdown voltage; point-plane geometries; sphere-rod geometries; sphere-sphere geometries; surface flashover;
Conference_Titel :
High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)
Conference_Location :
London
Print_ISBN :
0-85296-719-5
DOI :
10.1049/cp:19990710
