Field Grading in Capacitor Margins
Abstract
This paper includes some of the results of modeling electric fields in the margin of a bogey plastic film liquid impregnant capacitor in which effects of foil edge shape, different impregnants, and grading wires are examined. It will be concluded that placement tolerance and connection problems make grading wires impractical and that folded foil edges are still the best solution to field grading. High energy-density capacitors for pulse discharge are in general constructed of cylindrically wound plastic film, aluminum foil, and liquid impregnant. When quality control is exercised in manufacture, capacitor failures tend to occur from corona discharge at the foil edges in the capacitor margin. Figure 1 shows a cross section of several layers of a plastic film liquid impregnant capacitor.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1981
- Accession Number
- ADA637691
Entities
People
- Thomas E. Springer
- Walter J. Sarjeant
- William C. Nunnally
Organizations
- Los Alamos National Laboratory