HPRWG1-12F跌落式熔斷器

一、概述

    跌落式熔斷器及拉負荷跌落式熔斷器是戶外高壓保護電器。它裝置在配電變壓器高壓側或配電線支干線路上、用作變壓器和線路的短路、過載保護及分、合負荷電流。跌落式熔斷器由絕緣支架和熔絲管二部分組成，靜觸頭安裝在絕緣支架兩端，動觸頭安裝在熔絲管兩端，熔絲管由內層的消弧管和外層的酚醛紙管或環氧玻璃布管組成。拉負荷跌落式熔斷器增強彈性輔助觸頭及滅弧罩，用以分，合負荷電流。
    跌落式熔(rong)(rong)斷(duan)(duan)器在(zai)正常運行時(shi)，熔(rong)(rong)絲(si)管(guan)借(jie)助熔(rong)(rong)絲(si)張緊(jin)后(hou)形(xing)(xing)成(cheng)閉合位置(zhi)(zhi)。當系統(tong)發生故障時(shi)，故障電(dian)(dian)(dian)(dian)(dian)流時(shi)熔(rong)(rong)絲(si)迅(xun)速熔(rong)(rong)斷(duan)(duan)，并形(xing)(xing)成(cheng)電(dian)(dian)(dian)(dian)(dian)弧，消弧管(guan)受電(dian)(dian)(dian)(dian)(dian)弧灼熱(re)，分(fen)解出大量的(de)氣體，使(shi)館內形(xing)(xing)成(cheng)很高壓力，并沿管(guan)道(dao)形(xing)(xing)成(cheng)縱吹，電(dian)(dian)(dian)(dian)(dian)弧被(bei)迅(xun)速拉長(chang)而熄滅。熔(rong)(rong)絲(si)熔(rong)(rong)斷(duan)(duan)后(hou)，下部動(dong)(dong)觸(chu)頭(tou)失去(qu)張力二下翻，鎖(suo)緊(jin)機械，釋放熔(rong)(rong)絲(si)管(guan)，熔(rong)(rong)絲(si)管(guan)跌落，形(xing)(xing)成(cheng)明顯(xian)的(de)開斷(duan)(duan)位置(zhi)(zhi)。當需(xu)要(yao)拉負荷時(shi)，用絕(jue)緣(yuan)桿拉開動(dong)(dong)觸(chu)頭(tou)，此時(shi)主動(dong)(dong)、靜(jing)動(dong)(dong)觸(chu)頭(tou)仍然接(jie)觸(chu)，繼續用絕(jue)緣(yuan)桿拉動(dong)(dong)觸(chu)頭(tou)，輔助觸(chu)頭(tou)也(ye)分(fen)離，在(zai)輔助觸(chu)頭(tou)之間產生電(dian)(dian)(dian)(dian)(dian)弧，電(dian)(dian)(dian)(dian)(dian)弧在(zai)滅罩狹(xia)縫(feng)中被(bei)拉長(chang)，同(tong)時(shi)滅弧罩產生氣體，在(zai)電(dian)(dian)(dian)(dian)(dian)流過零時(shi)，將電(dian)(dian)(dian)(dian)(dian)弧熄滅。

二、參數