Dielectric characteristics of a model transmission line in the presence of fire

Author

Robledo-Martinez, A. ; Guzman, E. ; Hernandez, J.L.

Author_Institution

Dept. of Energia, Univ. Autonoma Metropolitana, Mexico City, Mexico

Volume

26

Issue

4

fYear

1991

fDate

8/1/1991 12:00:00 AM

Firstpage

776

Lastpage

782

Abstract

The results of experimental investigation into the dielectric properties of air insulation in the presence of fire are reported. The experiments were performed on a 70-kV model transmission line. It is demonstrated that fire can reduce by half the breakdown voltage of a line. This reduction is explained in terms of the contributions of temperature, ionization, and flow of solid particles (ashes). The results add criteria for the design of transmission lines. The results are relevant to agricultural fires (e.g., the intentional burning of sugarcane fields under HV transmission lines)

Keywords

dielectric properties of gases; electric breakdown of gases; fires; gaseous insulation; power overhead lines; 70 kV; HV transmission lines; agricultural fires; air insulation; breakdown voltage; burning; design; dielectric properties; fire; flow of solid particles; ionization; model transmission line; sugarcane fields; Combustion; Conductors; Dielectrics and electrical insulation; Fires; Ionization; Law; Power transformer insulation; Solids; Temperature measurement; Transmission lines;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.83702

Filename

83702