Breakdown Characteristics of SF<sub>6</sub>in Different State and Bubble Movements under AC High-Voltage

Choi, Eun-Hyeok; Lim, Chang-Ho; Yoon, Dae-Hee; Park, Kwang-Seo; Kim, Lee-Kook; Lee, Kwang-Sik

doi:10.5370/jeet.2007.2.2.257

Cited by 1 publication

(1 citation statement)

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“…It implies that the generated bubbles would be stagnant between electrodes, and it caused the reduction of breakdown voltage in . It was known that the breakdown voltage of point-to-plane electrode was higher than that of plane-to-plane electrode due to the higher bubble stagnation between the uniform electrode that that of non-uniform electrode in [6]. And the increasing area and volume of electrode causes the reduction of breakdown voltage in [7].…”

Section: A Ac Overvoltage Testsmentioning

confidence: 95%

Evaluation of Uniform and Non-uniform Breakdown Characteristics of Liquid Nitrogen With Different Electrode Materials

Shin

Seong

Hwang

et al. 2012

IEEE Trans. Appl. Supercond.

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High temperature superconducting devices utilize liquid nitrogen both for cryogenic liquids and insulating media. Regarding the insulating performance of , it shows excellent characteristics comparable to insulating oil which is widely used for conventional electric equipment. But, detailed complex insulating structure in composed of cryogenic liquids, solid insulating material and conductor material has not been fully considered yet. In order to commercialize superconducting devices, insulating characteristics of should be analysed and confirmed to the level of insulating oil. In this work, we focused on the breakdown characteristics of especially for different electrode materials. Aluminum, Stainless steel, and Copper electrode systems were fabricated and tested in to verify uniform and non-uniform characteristics of according to the electrode materials. AC withstand voltage test and lightning impulse test has been performed. From the test results, it was revealed that the breakdown voltages were significantly changed according to the electrode materials. Especially for Stainless steel, it shows prominent enhancement of breakdown voltage compared to copper and aluminum electrode in . Consequently, it was deduced that optimum choice of conductor materials in is another critical factor to determine complex insulating performance of superconducting devices.

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Section: A Ac Overvoltage Testsmentioning

confidence: 95%

Evaluation of Uniform and Non-uniform Breakdown Characteristics of Liquid Nitrogen With Different Electrode Materials

Shin

Seong

Hwang

et al. 2012

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

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Breakdown Characteristics of SF₆in Different State and Bubble Movements under AC High-Voltage

Cited by 1 publication

References 5 publications

Evaluation of Uniform and Non-uniform Breakdown Characteristics of Liquid Nitrogen With Different Electrode Materials

Evaluation of Uniform and Non-uniform Breakdown Characteristics of Liquid Nitrogen With Different Electrode Materials

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Breakdown Characteristics of SF6in Different State and Bubble Movements under AC High-Voltage

Cited by 1 publication

References 5 publications

Evaluation of Uniform and Non-uniform Breakdown Characteristics of Liquid Nitrogen With Different Electrode Materials

Evaluation of Uniform and Non-uniform Breakdown Characteristics of Liquid Nitrogen With Different Electrode Materials

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Breakdown Characteristics of SF₆in Different State and Bubble Movements under AC High-Voltage