Charge Distribution and Charging Characteristics of Cylindrical Alumina Insulator with Shield Rings in Vacuum

Fukuda, Hideaki; Fujita, Issei; Yamano, Yasushi; Yamamura, Kenta; Yamamoto, Osamu

doi:10.1109/deiv.2018.8537164

Cited by 2 publications

(1 citation statement)

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“…Usually, surface flashover phenomena in vacuum are initiated by field emission from the cathode triple junction (CTJ); repeated collisions of the emitted electrons with insulators generate secondary electron emission avalanche, and thus produced positive charging triggers flashover 3,4 . Positive charging can be suppressed by arranging shield rings to relax electric field near CTJ; 5 we previously examined relationship between shield ring shape and charge distribution on insulator surface 6,7 …”

Section: Introductionmentioning

confidence: 99%

Charging potential measurement of floating electrode modeled on the arc shield of vacuum interrupter under AC voltage application

Fukuda

Yamamura

Fujita

et al. 2021

Electrical Engineering Japan

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A charging potential of a floating electrode modeled on vacuum interrupter was measured under unipolar AC voltage application using a surface potential meter. As a result, when a lower voltage was applied to the samples, only an induced potential depending on the electrostatic capacities of the sample and surrounding objects around the sample was measured from the floating electrode. However, in the case of high voltage application, not only induced voltage but also a positive charging potential was observed from the floating electrode which was enough to change the potential of the floating electrode. This is due to the field electron emission from the floating electrode itself.

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Section: Introductionmentioning

confidence: 99%