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一、概述

    跌(die)落(luo)(luo)式(shi)熔(rong)(rong)斷(duan)器(qi)(qi)及拉負(fu)(fu)荷跌(die)落(luo)(luo)式(shi)熔(rong)(rong)斷(duan)器(qi)(qi)是戶外高壓(ya)(ya)保(bao)護電(dian)器(qi)(qi)。它裝(zhuang)置在配電(dian)變壓(ya)(ya)器(qi)(qi)高壓(ya)(ya)側(ce)或(huo)配電(dian)線(xian)支干線(xian)路(lu)(lu)上(shang)、用作變壓(ya)(ya)器(qi)(qi)和線(xian)路(lu)(lu)的短路(lu)(lu)、過載保(bao)護及分、合(he)負(fu)(fu)荷電(dian)流。跌(die)落(luo)(luo)式(shi)熔(rong)(rong)斷(duan)器(qi)(qi)由(you)絕緣支架(jia)和熔(rong)(rong)絲管(guan)(guan)二部分組(zu)成，靜觸頭(tou)(tou)安裝(zhuang)在絕緣支架(jia)兩端，動觸頭(tou)(tou)安裝(zhuang)在熔(rong)(rong)絲管(guan)(guan)兩端，熔(rong)(rong)絲管(guan)(guan)由(you)內層的消(xiao)弧(hu)管(guan)(guan)和外層的酚醛(quan)紙管(guan)(guan)或(huo)環(huan)氧玻璃(li)布管(guan)(guan)組(zu)成。拉負(fu)(fu)荷跌(die)落(luo)(luo)式(shi)熔(rong)(rong)斷(duan)器(qi)(qi)增強彈性輔助(zhu)觸頭(tou)(tou)及滅(mie)弧(hu)罩，用以分，合(he)負(fu)(fu)荷電(dian)流。

    跌落式熔(rong)(rong)斷器(qi)在正常運行時，熔(rong)(rong)絲管(guan)借助熔(rong)(rong)絲張(zhang)緊(jin)后(hou)形(xing)成(cheng)閉合位置。當系統發生(sheng)故(gu)障(zhang)時，故(gu)障(zhang)電(dian)(dian)(dian)流時熔(rong)(rong)絲迅(xun)速熔(rong)(rong)斷，并形(xing)成(cheng)電(dian)(dian)(dian)弧(hu)(hu)，消弧(hu)(hu)管(guan)受電(dian)(dian)(dian)弧(hu)(hu)灼(zhuo)熱，分解出大量的(de)氣體(ti)，使館內形(xing)成(cheng)很高壓(ya)力(li)，并沿管(guan)道形(xing)成(cheng)縱吹，電(dian)(dian)(dian)弧(hu)(hu)被(bei)迅(xun)速拉(la)(la)(la)長而(er)熄(xi)滅(mie)。熔(rong)(rong)絲熔(rong)(rong)斷后(hou)，下(xia)部動(dong)(dong)觸頭(tou)失去張(zhang)力(li)二(er)下(xia)翻，鎖緊(jin)機械，釋(shi)放熔(rong)(rong)絲管(guan)，熔(rong)(rong)絲管(guan)跌落，形(xing)成(cheng)明(ming)顯的(de)開斷位置。當需要拉(la)(la)(la)負荷時，用(yong)絕緣桿(gan)拉(la)(la)(la)開動(dong)(dong)觸頭(tou)，此時主動(dong)(dong)、靜(jing)動(dong)(dong)觸頭(tou)仍然接觸，繼續用(yong)絕緣桿(gan)拉(la)(la)(la)動(dong)(dong)觸頭(tou)，輔(fu)(fu)助觸頭(tou)也分離(li)，在輔(fu)(fu)助觸頭(tou)之(zhi)間產生(sheng)電(dian)(dian)(dian)弧(hu)(hu)，電(dian)(dian)(dian)弧(hu)(hu)在滅(mie)罩狹縫(feng)中被(bei)拉(la)(la)(la)長，同時滅(mie)弧(hu)(hu)罩產生(sheng)氣體(ti)，在電(dian)(dian)(dian)流過零時，將電(dian)(dian)(dian)弧(hu)(hu)熄(xi)滅(mie)。

二、用途

    戶外高壓(ya)熔斷(duan)器適(shi)用于35kv及以下電(dian)壓(ya)頻率50Hz電(dian)力系統(tong)中，作(zuo)輸電(dian)線路、電(dian)力變壓(ya)器過載和短路保護，分合額定負(fu)荷電(dian)流只(zhi)用，機械壽命≥2000次。

三、使用條件

1.適用于環境溫度上限40℃，下限-30℃之內。

2.海拔不超過1000m，風(feng)速不大于35m/s

3.熔斷器不適用于下述場所

3.1有(you)燃料(liao)或(huo)爆炸危險的(de)場(chang)所。

3.2有(you)劇烈震動或沖擊(ji)的場所。

3.3有(you)異電化學(xue)氣體作用及(ji)嚴重(zhong)空氣污穢，煙霧地區(qu)。

四、結構簡介

    熔(rong)(rong)斷器(qi)(qi)是由基座和(he)消弧(hu)(hu)裝置兩大部分(fen)組成，滅弧(hu)(hu)管(guan)下端裝有可(ke)能轉動的彈簧(huang)支架，始終使熔(rong)(rong)絲(si)處(chu)于緊張狀態，以(yi)保證滅弧(hu)(hu)管(guan)在合閘位置的自鎖，線路與(yu)變壓器(qi)(qi)過載(zai)或短路中，熔(rong)(rong)絲(si)熔(rong)(rong)斷，熔(rong)(rong)絲(si)迅速從滅弧(hu)(hu)管(guan)中抽出，滅弧(hu)(hu)管(guan)設計為(wei)逐級排氣式解決在同(tong)一熔(rong)(rong)斷器(qi)(qi)上開斷大小電(dian)流(liu)的矛盾。

五(wu)、型號說明

六、主要技術參數

七、外形及安裝尺寸