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灭电弧
相关语句
  arc suppressing
     metal-oxides have the good arc suppressing property;
     金属氧化物具有良好的灭电弧能力;
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  相似匹配句对
     metal-oxides have the good arc suppressing property;
     金属氧化物具有良好的电弧能力;
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     Test Study on Self-Extinction Behavior of Secondary Arc on Power System
     电力系统潜供电弧特性的模拟研究
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     ELECTRIC ARC Zn SPRAYING TECHNOLOGY
     电弧喷锌技术
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     High Speed Rotating Arc Sensor
     高速旋转电弧传感器
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     Birth and Death Q-Matrices
     生Q-矩阵
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At present,silver and its alloys are used as matrix material of low-medium loadelectric corltacts in abroad and home。As silver is very exl1ensive,it is of great economicsignificance to develop the non- silver electric contact materials.The copper-base electric contactcomposites have been successfully developed with powder metallurgy methed。The main propertiesof contact consisted of Cu-graphite(3)-ZnO(2)-W were systematically investigated as comparedwith those of silver contact. The results showed that the electric...

At present,silver and its alloys are used as matrix material of low-medium loadelectric corltacts in abroad and home。As silver is very exl1ensive,it is of great economicsignificance to develop the non- silver electric contact materials.The copper-base electric contactcomposites have been successfully developed with powder metallurgy methed。The main propertiesof contact consisted of Cu-graphite(3)-ZnO(2)-W were systematically investigated as comparedwith those of silver contact. The results showed that the electric and tribological properties ofcopper-base contact material are equal to or better than those of silver contact due to the addition ofgraphite,metal-oxides and high-melting point metal etc。 Graphite has been well-distributed in thecopper-base material.Not only it is of the protection effect to material but also it has the lubrieationand antiwelding effects;metal-oxides have the good arc suppressing property;as the hard phase thehigh-melting point metal can increase the antiwear property of the material. It is can be seen fromabove-mentioned,this copper-base electric contact compooite has the advantages of good antiwear,decrcasing friction,antiwelding and arc suppressing etc,and the copper matrix material is notexpensive,so the copper-base electric contact composite is a good engineering material which can bepopularized in further use.

目前,国内外主要用银及其合金作为低压电器中的低、中负荷触头的基体材料。由于银的价格昂贵,研制无银电触头材料显然具有重大的经济意义。因此,利用粉末冶金法研制成功了几种铜基电接触复合材料,并且着重就其中的Cu-石墨(3)-Zno(2)-W这种四组元材料触头与银触头的主要性能作了系统的对比试验研究。结果表明,由于石墨、金属氧化物和高熔点金属等的加入,铜基触头材料的电性能和摩擦学特性都达到或超过了银触头的水平。石墨在铜基材料中的分布均匀,不仅对材料具有保护作用,而且还能够起润滑和抗熔焊作用;金属氧化物具有良好的灭电弧能力;高熔点金属作为硬质相可以增强材料的耐磨性。由此可见,这种四组元铜基电接触复合材料具有良好的耐磨、减摩、抗熔焊和耐电弧侵蚀性能等优点,而且所用基材铜的价格比较便宜,故其是一种具有良好推广应用前景的工程材料。

The article made introductions to each stage situations of the arc-extinguishing chamber design development for SF,, High-voltage circuit breaker,starting from relying on mechanism compressed jet-let blowing arc extinguishing to having being improved as compressed gas arc extinguishing and hot compressed-gas(chamber) arc extinguishing etc means.

文章介绍SF6高压断路器灭弧室设计发展的各阶段情况,从依靠机构压缩喷口吹灭电弧,改进 至压气式灭弧,以及热压气(室)灭弧等方式。

 
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