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Title: Discharge Phenomena of the Insulator Assembly and Occurrence of Critical Cascading Flashover Phenomena
Authors: KOUNO, Toshihiko
UENOSONO, Chikasa
HAYASHI, Muneaki
YAMAMOTO, Osamu
Issue Date: 30-Nov-1983
Publisher: Faculty of Engineering, Kyoto University
Journal title: Memoirs of the Faculty of Engineering, Kyoto University
Volume: 45
Issue: 3
Start page: 69
End page: 78
Abstract: This paper describes conditions for an occurrence of cascading flashover phenomena on the insulator assembly with the use of a high voltage transmission line by experiments in a laboratory room. The 154 kV suspension insulator assembly is employed as testing apparatus which consists of a chain of 9 standard suspension insulators equipped with an arcing horn. In the experiments, the apparatus is separated into two parts consisting of a bare insulator chain and a pair of arcing horns. The lightning impulse with positive polarity or negative are applied to the test pieces, and the over-voltage is used in those tests. Thus, the creeping flashover occurred with short lag time. The V-t curves and the 50% cascading flashover voltage were obtained and the prebreakdown phenomena were observed from the tests, then, it is concluded that the critical cascading flashovers occur with short time lag (T₀=1.8 μ sec. or less) and a high steepness (1833 kV/μ sec. or more), and corona on the insulator surface starts from negative side electrode.
URI: http://hdl.handle.net/2433/281249
Appears in Collections:Vol.45 Part 3

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