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Development of A 1 kA Class Alternating Current Lead System for a Fault Current Limiter

  • M. Takahashi
  • T. Kuriyama
  • H. Nakagome
  • K. Yamamoto
  • Y. Yamada
  • M. Nakade
  • T. Okuma
  • T. Hara
Part of the A Cryogenic Engineering Conference Publication book series (ACRE, volume 41)

Abstract

A thermal design of a 1 kA/6.6 kV class superconducting fault current limiter was discussed, and specifications for a current lead system were obtained. According to these specifications, a 1 kA rms current lead system has been designed and tested. The current lead system was composed of (Bi,Pb)2Sr2Ca2Cu3O10+x tube leads (used in 77–4 K range), Cu leads (used in 300–77 K), a liquid helium vessel and a 77 K refrigerator, which cools the thermal anchor of the current leads and a radiation shield. The current lead system was placed in a vacuum vessel and cooled by thermal conduction. This lead system successfully transported 1 kA rms alternating current for 3 hours under steady-state temperature distribution. The total heat load to 4 K for 1 kA rms current was 3.5 W. We have a prospect of developing a small cooling system for a 1 kA class fault current limiter.

Keywords

Heat Load Current Lead Vacuum Vessel Radiation Shield Superconducting Fault Current Limiter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • M. Takahashi
    • 1
  • T. Kuriyama
    • 1
  • H. Nakagome
    • 1
  • K. Yamamoto
    • 1
  • Y. Yamada
    • 1
  • M. Nakade
    • 2
  • T. Okuma
    • 2
  • T. Hara
    • 2
  1. 1.Toshiba, R & D CenterKawasaki-ku, Kawasaki, 210Japan
  2. 2.Power Engineering R & D CenterTokyo Electric Power CompanyTsurumi, Yokohama, 230Japan

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