Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Effect of Nickel addition in DC arc test of Cu-W electrode

Cu-W 전극의 DC Arc 시험에 있어서 Nickel 첨가 영향

  • Kim, Bong-Seo (Advanced Electrical Materials Group, Korea Electrotechnology Research Institute) ;
  • Chung, Hyeon-Wook (Advanced Electrical Materials Group, Korea Electrotechnology Research Institute) ;
  • Lee, Hee-Woong (Advanced Electrical Materials Group, Korea Electrotechnology Research Institute)
  • 김봉서 (한국전기연구원 신소재응용그룹) ;
  • 정현욱 (한국전기연구원 신소재응용그룹) ;
  • 이희웅 (한국전기연구원 신소재응용그룹)
  • Published : 2003.05.30
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Abstract

Sintered Cu-W has been used for the electrode of GIS for interrupting the abnormal current. In this study the effect of Ni addition in Cu-W electrode was investigated. Cu-W electrodes used contains 0.1~0.2wt% Ni and were conducted the experiments which was attacked by DC arc test (70V-70A) for 300 times periodically. As the contents of Ni in Cu-W electrode increase, the hardness and electrical conductivity were decreased. The weight change ($\Delta$mg) of electrode after DC arc test increased with increasing Ni contents and test times. The hardness and electrical conductivity of electrode after DC arc test were decreased compared with non-arc affected electrode, which was owing to the defects near surface of electrode and degradation by arc heat. It was considered that Cu in the Cu-W electrode was scattered to all directions by arc heat, therefore, the electrodes were damaged and deformed in the surface and cross-section of electrode. It is difficult to estimate directly the characteristics of Cu-W electrode for GIS related with high voltage and current from the results of DC arc test conducted in this study. However, the results of the effect of Ni addition in Cu-W electrode could be applied for the research of electrode for GIS.

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