Experimental study on surface flashover of a coaxial cable under nanosecond impulse voltage

Author

Min, Han ; Shengju, Lee ; Jinji, Yang

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

fYear

1988

fDate

12-16 Sep 1988

Firstpage

98

Abstract

The flashover along the polythene surface of a coaxial cable has been studied under the condition of nanosecond impulse voltage. The average impulse flashover voltage for unit length E₁ along the insulation length (D) of 5-15 cm was measured and found to be 6-3.5 kV/cm. The delay time of the flashover is in the range of 500-700 ns. The velocity of the propagation of discharge was measured and found to be 2±0.5×10⁷ cm/s at D=12 cm. In order to compare with the DC values, the DC average flashover voltage for unit length was measured and found to be 7.8-5.8 kV/cm for D=5-15 cm. The authors measured the voltage-time curves of the flashover along the polythene surface and a pressurized spark gap

Keywords

coaxial cables; flashover; impulse testing; surface discharges; 5 to 15 cm; 500 to 700 ns; DC average flashover voltage; coaxial cable; delay time; impulse flashover voltage; nanosecond impulse voltage; polythene surface; pressurized spark gap; propagation; surface flashover; velocity; voltage-time curves; Cable shielding; Circuits; Coaxial cables; Delay effects; Flashover; Optical propagation; Propagation delay; Rectifiers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of

Conference_Location

Beijing

Type

conf

DOI

10.1109/ICPADM.1988.38341

Filename

38341