Study of contact resistance in the design of a pyro-breaker applied in superconducting fusion facility

Jun HE (何鋆); Zhiquan SONG (宋执权); Cunwen TANG (汤存文); Peng FU (傅鹏); Jie ZHANG (张杰)

doi:10.1088/2058-6272/aaf590

Plasma Science and Technology > 2019 > 21(6): 65602-065602. > DOI: 10.1088/2058-6272/aaf590

Jun HE (何鋆), Zhiquan SONG (宋执权), Cunwen TANG (汤存文), Peng FU (傅鹏), Jie ZHANG (张杰). Study of contact resistance in the design of a pyro-breaker applied in superconducting fusion facility[J]. Plasma Science and Technology, 2019, 21(6): 65602-065602. DOI: 10.1088/2058-6272/aaf590

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Study of contact resistance in the design of a pyro-breaker applied in superconducting fusion facility

¹ Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
² University of Science and Technology of China, Hefei 230031, People’s Republic of China

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Received Date: August 30, 2018

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Abstract

Abstract

Pyro-breaker is a fast-responding and high-reliable explosive-driven circuit breaker, which has been applied in several quench protection systems, such as International Thermonuclear Experimental Reactor and Experimental Advanced Superconducting Tokamak. As an indispensable back-up switch, Pyro-breaker guarantees the reliability and safety of the system and avoids tremendous loss when quench happens. Electrical contact, a crucial part of an electrical device greatly determines the steady current capacity of a Pyro-breaker. However, due to the complexity of the model and the deficiency knowledge of the microstate of contact areas, an accurate calculation for contact resistance is difficult to acquire. A study of electrical contact in the design of a Pyro-breaker has been presented in this paper. An engineering calculation method is verified with experiments. Parameters are fitted for the presented model, which will be a significant theoretical basis for the future designing.
- quench protection system,
- pyro-breaker,
- contact resistance,
- four-point-method

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References

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Study of contact resistance in the design of a pyro-breaker applied in superconducting fusion facility