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(luo)式熔(rong)(rong)(rong)斷(duan)(duan)器在(zai)(zai)正(zheng)常運行(xing)時(shi)(shi)，熔(rong)(rong)(rong)絲管借助熔(rong)(rong)(rong)絲張(zhang)緊后(hou)形成(cheng)閉合位(wei)置。當(dang)系統發生故障(zhang)時(shi)(shi)，故障(zhang)電(dian)(dian)流時(shi)(shi)熔(rong)(rong)(rong)絲迅速熔(rong)(rong)(rong)斷(duan)(duan)，并(bing)形成(cheng)電(dian)(dian)弧(hu)，消弧(hu)管受電(dian)(dian)弧(hu)灼熱，分解出大量的氣體(ti)，使館內形成(cheng)很高壓力(li)，并(bing)沿管道(dao)形成(cheng)縱吹，電(dian)(dian)弧(hu)被迅速拉(la)長(chang)而熄(xi)滅(mie)。熔(rong)(rong)(rong)絲熔(rong)(rong)(rong)斷(duan)(duan)后(hou)，下(xia)部動(dong)觸(chu)(chu)頭失去張(zhang)力(li)二下(xia)翻，鎖緊機械，釋放熔(rong)(rong)(rong)絲管，熔(rong)(rong)(rong)絲管跌落(luo)，形成(cheng)明顯的開(kai)斷(duan)(duan)位(wei)置。當(dang)需(xu)要拉(la)負(fu)荷時(shi)(shi)，用絕緣桿拉(la)開(kai)動(dong)觸(chu)(chu)頭，此時(shi)(shi)主動(dong)、靜動(dong)觸(chu)(chu)頭仍然接(jie)觸(chu)(chu)，繼續用絕緣桿拉(la)動(dong)觸(chu)(chu)頭，輔助觸(chu)(chu)頭也(ye)分離，在(zai)(zai)輔助觸(chu)(chu)頭之間(jian)產生電(dian)(dian)弧(hu)，電(dian)(dian)弧(hu)在(zai)(zai)滅(mie)罩(zhao)狹縫(feng)中被拉(la)長(chang)，同時(shi)(shi)滅(mie)弧(hu)罩(zhao)產生氣體(ti)，在(zai)(zai)電(dian)(dian)流過零時(shi)(shi)，將電(dian)(dian)弧(hu)熄(xi)滅(mie)。

二、參數