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

• Published in: Electrical engineering in Japan Vol. 214; no. 2
• Main Authors: Fukuda, Hideaki, Yamamura, Kenta, Fujita, Issei, Kusa, Ryutaro, Yamano, Yasushi
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc 01-06-2021
• Subjects: Charging; charging potential; Electrodes; Electron emission; floating electrode; Induced voltage; Interrupters; surface flashover; vacuum interrupter
• ISSN: 0424-7760; 1520-6416
• DOI: 10.1002/eej.23328

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.