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RW3跌落式开关

更新:2013-9-26 13:19:49      点击:
  • 产品品牌   
  • 产品型号   RW3
  • 产品描述

    RW3跌落式开关,是上海人民电气有限公司 http://www.shamandq.com 为您提供的关于RW3跌落式开关型号,RW3跌落式开关价格,有关RW3跌落式开关的相关资料,上海人民电气有限公司...

产品介绍

跌落式熔断器及拉负荷跌落式熔断器是户外高压保护电器。它装置在配电变压器高压侧或配电线支干线路上、用作变压器和线路的短路、过载保护及分、合负荷电流。跌落式熔断器由绝缘支架和熔丝管二部分组成,静触头安装在绝缘支架两端,动触头安装在熔丝管两端,熔丝管由内层的消弧管和外层的酚醛纸管或环氧玻璃布管组成。拉负荷跌落式熔断器增强弹性辅助触头及灭弧罩,用以分,合负荷电流。
跌落式熔断器在正常运行时,熔丝管借助熔丝张紧后形成闭合位置。当系统发生故障时,故障电流时熔丝迅速熔断,并形成电弧,消弧管受电弧灼热,分解出大量的气体,使馆内形成很高压力,并沿管道形成纵吹,电弧被迅速拉长而熄灭。熔丝熔断后,下部动触头失去张力二下翻,锁紧机械,释放熔丝管,熔丝管跌落,形成明显的开断位置。当需要拉负荷时,用绝缘杆拉开动触头,此时主动、静动触头仍然接触,继续用绝缘杆拉动触头,辅助触头也分离,在辅助触头之间产生电弧,电弧在灭罩狭缝中被拉长,同时灭弧罩产生气体,在电流过零时,将电弧熄灭。

压器过载和短路保护,分合额定负荷电流只用,机械寿命≥2000次。
1.适用于环境温度上限40℃,下限-30℃之内。
2.海拔不超过1000m,风速不大于35m/s
3.熔断器不适用于下述场所
3.1有燃料或爆炸危险的场所。
3.2有剧烈震动或冲击的场所。
3.3有异电化学气体作用及严重空气污秽,烟雾地区。

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