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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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