Title :
Dielectric characteristics of SF6 under the steep-fronted impulses
Author :
Zhang, Qiaogen ; Qiu, Yuchang ; Wang, Pei ; Gu, Wenguo
Author_Institution :
Sch. of Electr. Eng., Xi´´an Jiaotong Univ., China
Abstract :
The influence of the wavefront duration on impulse breakdown voltage of the nonuniform field gap in compressed SF6 gas has been studied using a point-plane electrode arrangement. Voltage-time curves are also given in this paper. For comparison purposes, dielectric characteristics of SF6 in a sphere-plane gap have been measured. The wavefronts used in this work are 0.05, 0.3, 0.6, 0.9, 1.2 and 1.5 μs. The experimental results show that the wavefront duration has significant influence on the dielectric behaviour of SF6 in the nonuniform field. It is found that the breakdown voltage-wavefront relationships and voltage-time curves of nonuniform field tend to be U-shaped
Keywords :
SF6 insulation; electric breakdown; impulse testing; insulation testing; 0.05 mus; 0.3 mus; 0.5 mus; 0.9 mus; 1.2 mus; 1.5 mus; SF6; U-shaped curves; breakdown voltage-wavefront relationships; dielectric behaviour; dielectric characteristics; impulse breakdown voltage; nonuniform field gap; point-plane electrode arrangement; sphere-plane gap; steep-fronted impulses; voltage-time curves; wavefront duration; Breakdown voltage; Dielectric breakdown; Dielectric measurements; Electrical resistance measurement; Electrodes; Geographic Information Systems; Nonuniform electric fields; Pollution measurement; Sulfur hexafluoride; Voltage control;
Conference_Titel :
Electrical Insulation, 1996., Conference Record of the 1996 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3531-7
DOI :
10.1109/ELINSL.1996.549458
