High voltage research: Breakdown strengths of gaseous and liquid insulators
Abstract
Research work to improve gaseous dielectrics continued. The breakdown strengths of C6F10 (perfluorocyclohexene) and C6F12 (mixture of 1,2- and 1,3- perfluorodimethylcyclobutane) have been found to be, respectively, 2.3 to 2.4 and 1.9 to 2.2 times higher than SF6 under identical experimental conditions. The breakdown strengths of mixtures of C4F6, SF6, c-C4F8, iso-C4F8, and C3F8 with N2 have been studied systematically in various combinations in an effort to understand the role of the basic properties and effectiveness of each component of a multicomponent gas on the breakdown strength. A number of such mixtures (e.g., 20 percent C4F6, 20 percent SF6, and 60 percent N2) are better and cheaper than SF6. Basic electron attachment data have been obtained for C3F8, and the overall effectiveness of inelastic processes has been assessed for a number of gases based on their electron transport coefficients.
- Publication:
-
Quarterly Report
- Pub Date:
- February 1977
- Bibcode:
- 1977ornl.reptR....C
- Keywords:
-
- Dielectric Properties;
- Dielectrics;
- High Voltages;
- Electrical Insulation;
- Fluorocarbons;
- Insulators;
- Silicon Compounds;
- Electronics and Electrical Engineering