產品說明及使用方法:
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)(rong)斷器在正(zheng)常運(yun)行時,熔(rong)(rong)(rong)絲管(guan)借助(zhu)熔(rong)(rong)(rong)絲張緊后形(xing)成閉合位置。當(dang)系(xi)統發生(sheng)故(gu)(gu)障時,故(gu)(gu)障電(dian)(dian)流(liu)時熔(rong)(rong)(rong)絲迅速熔(rong)(rong)(rong)斷,并(bing)形(xing)成電(dian)(dian)弧,消(xiao)弧管(guan)受電(dian)(dian)弧灼熱,分(fen)解出(chu)大量的氣(qi)體(ti)(ti),使館內形(xing)成很高壓力,并(bing)沿管(guan)道形(xing)成縱(zong)吹,電(dian)(dian)弧被迅速拉(la)長(chang)而熄滅(mie)(mie)。熔(rong)(rong)(rong)絲熔(rong)(rong)(rong)斷后,下(xia)部動(dong)觸頭失去張力二下(xia)翻,鎖緊機械,釋放(fang)熔(rong)(rong)(rong)絲管(guan),熔(rong)(rong)(rong)絲管(guan)跌落,形(xing)成明顯的開斷位置。當(dang)需要(yao)拉(la)負(fu)荷時,用絕緣(yuan)桿(gan)拉(la)開動(dong)觸頭,此時主動(dong)、靜動(dong)觸頭仍然接觸,繼(ji)續用絕緣(yuan)桿(gan)拉(la)動(dong)觸頭,輔助(zhu)觸頭也分(fen)離,在輔助(zhu)觸頭之間(jian)產生(sheng)電(dian)(dian)弧,電(dian)(dian)弧在滅(mie)(mie)罩狹縫中被拉(la)長(chang),同時滅(mie)(mie)弧罩產生(sheng)氣(qi)體(ti)(ti),在電(dian)(dian)流(liu)過(guo)零時,將電(dian)(dian)弧熄滅(mie)(mie)。