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一、概述

    跌(die)落式熔斷器(qi)及(ji)拉(la)負(fu)荷跌(die)落式熔斷器(qi)是戶外高(gao)壓(ya)保護(hu)電(dian)器(qi)。它裝置在(zai)配(pei)電(dian)變壓(ya)器(qi)高(gao)壓(ya)側(ce)或配(pei)電(dian)線(xian)支干線(xian)路(lu)上、用作變壓(ya)器(qi)和線(xian)路(lu)的短(duan)路(lu)、過(guo)載保護(hu)及(ji)分、合(he)負(fu)荷電(dian)流。跌(die)落式熔斷器(qi)由絕緣支架(jia)和熔絲(si)管(guan)(guan)二部分組(zu)成(cheng)，靜觸頭安(an)裝在(zai)絕緣支架(jia)兩端，動觸頭安(an)裝在(zai)熔絲(si)管(guan)(guan)兩端，熔絲(si)管(guan)(guan)由內(nei)層的消弧管(guan)(guan)和外層的酚(fen)醛紙管(guan)(guan)或環(huan)氧玻璃布管(guan)(guan)組(zu)成(cheng)。拉(la)負(fu)荷跌(die)落式熔斷器(qi)增強(qiang)彈性輔助觸頭及(ji)滅弧罩，用以(yi)分，合(he)負(fu)荷電(dian)流。

    跌落(luo)式熔(rong)斷器在(zai)正常運行時(shi)(shi)，熔(rong)絲(si)(si)管借助(zhu)熔(rong)絲(si)(si)張(zhang)緊(jin)后(hou)形成(cheng)閉合位(wei)置(zhi)。當(dang)(dang)系(xi)統發生(sheng)故障時(shi)(shi)，故障電(dian)(dian)(dian)(dian)流(liu)時(shi)(shi)熔(rong)絲(si)(si)迅速熔(rong)斷，并形成(cheng)電(dian)(dian)(dian)(dian)弧(hu)(hu)，消弧(hu)(hu)管受(shou)電(dian)(dian)(dian)(dian)弧(hu)(hu)灼(zhuo)熱，分解出(chu)大(da)量的氣體，使館內形成(cheng)很(hen)高壓力，并沿管道形成(cheng)縱吹，電(dian)(dian)(dian)(dian)弧(hu)(hu)被(bei)迅速拉(la)長而熄(xi)滅(mie)。熔(rong)絲(si)(si)熔(rong)斷后(hou)，下部(bu)動(dong)觸頭失(shi)去張(zhang)力二下翻，鎖緊(jin)機械(xie)，釋放(fang)熔(rong)絲(si)(si)管，熔(rong)絲(si)(si)管跌落(luo)，形成(cheng)明(ming)顯(xian)的開斷位(wei)置(zhi)。當(dang)(dang)需要拉(la)負荷時(shi)(shi)，用絕(jue)緣(yuan)桿拉(la)開動(dong)觸頭，此時(shi)(shi)主動(dong)、靜(jing)動(dong)觸頭仍然(ran)接觸，繼續用絕(jue)緣(yuan)桿拉(la)動(dong)觸頭，輔助(zhu)觸頭也(ye)分離，在(zai)輔助(zhu)觸頭之間產(chan)生(sheng)電(dian)(dian)(dian)(dian)弧(hu)(hu)，電(dian)(dian)(dian)(dian)弧(hu)(hu)在(zai)滅(mie)罩狹縫中被(bei)拉(la)長，同時(shi)(shi)滅(mie)弧(hu)(hu)罩產(chan)生(sheng)氣體，在(zai)電(dian)(dian)(dian)(dian)流(liu)過零時(shi)(shi)，將電(dian)(dian)(dian)(dian)弧(hu)(hu)熄(xi)滅(mie)。

二、用途

    戶外高壓(ya)熔斷(duan)器適用(yong)于35kv及以下(xia)電(dian)(dian)壓(ya)頻率50Hz電(dian)(dian)力(li)系統中，作(zuo)輸(shu)電(dian)(dian)線路、電(dian)(dian)力(li)變(bian)壓(ya)器過載和短路保護(hu)，分合額定負荷(he)電(dian)(dian)流只用(yong)，機(ji)械壽(shou)命(ming)≥2000次(ci)。

三、使用條件

1.適用于(yu)環境溫度上限(xian)(xian)40℃，下限(xian)(xian)-30℃之(zhi)內(nei)。

2.海拔不超過1000m，風(feng)速(su)不大于35m/s

3.熔斷器不適用于下述場所

3.1有燃(ran)料或爆炸危(wei)險(xian)的場所。

3.2有劇烈震動或(huo)沖擊的場所(suo)。

3.3有(you)異電化(hua)學(xue)氣體作(zuo)用及嚴重(zhong)空氣污穢，煙霧地區。

四、結構簡介

    熔(rong)(rong)斷(duan)(duan)器是(shi)由(you)基座和(he)消弧(hu)裝(zhuang)置兩大部(bu)分組成，滅弧(hu)管下端(duan)裝(zhuang)有(you)可能轉動的(de)彈(dan)簧支架，始終使熔(rong)(rong)絲(si)處(chu)于緊張狀(zhuang)態(tai)，以保(bao)證滅弧(hu)管在合閘(zha)位置的(de)自鎖(suo)，線路(lu)與變(bian)壓(ya)器過(guo)載或短(duan)路(lu)中(zhong)(zhong)，熔(rong)(rong)絲(si)熔(rong)(rong)斷(duan)(duan)，熔(rong)(rong)絲(si)迅速(su)從(cong)滅弧(hu)管中(zhong)(zhong)抽出，滅弧(hu)管設計為(wei)逐級排(pai)氣式解決在同一熔(rong)(rong)斷(duan)(duan)器上開斷(duan)(duan)大小電流的(de)矛盾。

五、型號說明

六、主要技(ji)術(shu)參(can)數

七、外(wai)形及(ji)安裝尺寸(cun)