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一、概述

    跌落(luo)式(shi)(shi)(shi)熔(rong)(rong)(rong)斷器(qi)(qi)(qi)及拉負(fu)荷(he)跌落(luo)式(shi)(shi)(shi)熔(rong)(rong)(rong)斷器(qi)(qi)(qi)是戶外高壓保護電(dian)器(qi)(qi)(qi)。它(ta)裝(zhuang)置在配(pei)電(dian)變壓器(qi)(qi)(qi)高壓側或配(pei)電(dian)線支(zhi)干線路上、用(yong)作變壓器(qi)(qi)(qi)和線路的(de)(de)短路、過(guo)載保護及分(fen)、合(he)負(fu)荷(he)電(dian)流。跌落(luo)式(shi)(shi)(shi)熔(rong)(rong)(rong)斷器(qi)(qi)(qi)由(you)絕(jue)緣(yuan)支(zhi)架(jia)和熔(rong)(rong)(rong)絲管(guan)(guan)二(er)部分(fen)組成，靜觸(chu)(chu)頭(tou)安裝(zhuang)在絕(jue)緣(yuan)支(zhi)架(jia)兩端，動觸(chu)(chu)頭(tou)安裝(zhuang)在熔(rong)(rong)(rong)絲管(guan)(guan)兩端，熔(rong)(rong)(rong)絲管(guan)(guan)由(you)內層(ceng)(ceng)的(de)(de)消弧管(guan)(guan)和外層(ceng)(ceng)的(de)(de)酚醛紙管(guan)(guan)或環氧玻璃布管(guan)(guan)組成。拉負(fu)荷(he)跌落(luo)式(shi)(shi)(shi)熔(rong)(rong)(rong)斷器(qi)(qi)(qi)增強彈性輔助觸(chu)(chu)頭(tou)及滅(mie)弧罩，用(yong)以分(fen)，合(he)負(fu)荷(he)電(dian)流。

    跌(die)落(luo)式熔(rong)斷(duan)器(qi)在(zai)正常運行(xing)時(shi)(shi)(shi)，熔(rong)絲管(guan)(guan)借助(zhu)熔(rong)絲張緊后形(xing)成(cheng)閉合位置(zhi)。當系統(tong)發生(sheng)故障時(shi)(shi)(shi)，故障電(dian)流(liu)時(shi)(shi)(shi)熔(rong)絲迅速熔(rong)斷(duan)，并(bing)形(xing)成(cheng)電(dian)弧(hu)(hu)，消(xiao)弧(hu)(hu)管(guan)(guan)受(shou)電(dian)弧(hu)(hu)灼(zhuo)熱，分解出大量的氣體(ti)，使館內形(xing)成(cheng)很高壓力，并(bing)沿管(guan)(guan)道形(xing)成(cheng)縱吹，電(dian)弧(hu)(hu)被迅速拉長(chang)而熄滅(mie)。熔(rong)絲熔(rong)斷(duan)后，下部動(dong)觸(chu)(chu)(chu)頭(tou)失去張力二下翻，鎖緊機械，釋(shi)放熔(rong)絲管(guan)(guan)，熔(rong)絲管(guan)(guan)跌(die)落(luo)，形(xing)成(cheng)明顯的開斷(duan)位置(zhi)。當需要拉負荷時(shi)(shi)(shi)，用絕(jue)緣(yuan)桿(gan)拉開動(dong)觸(chu)(chu)(chu)頭(tou)，此時(shi)(shi)(shi)主動(dong)、靜動(dong)觸(chu)(chu)(chu)頭(tou)仍(reng)然(ran)接觸(chu)(chu)(chu)，繼續(xu)用絕(jue)緣(yuan)桿(gan)拉動(dong)觸(chu)(chu)(chu)頭(tou)，輔助(zhu)觸(chu)(chu)(chu)頭(tou)也分離，在(zai)輔助(zhu)觸(chu)(chu)(chu)頭(tou)之間產(chan)生(sheng)電(dian)弧(hu)(hu)，電(dian)弧(hu)(hu)在(zai)滅(mie)罩(zhao)狹縫中被拉長(chang)，同時(shi)(shi)(shi)滅(mie)弧(hu)(hu)罩(zhao)產(chan)生(sheng)氣體(ti)，在(zai)電(dian)流(liu)過零時(shi)(shi)(shi)，將電(dian)弧(hu)(hu)熄滅(mie)。

二、用途

    戶外高(gao)壓(ya)熔斷器(qi)適用于35kv及(ji)以下電壓(ya)頻率50Hz電力系統(tong)中，作(zuo)輸電線路(lu)、電力變壓(ya)器(qi)過載和(he)短路(lu)保護(hu)，分合額(e)定負(fu)荷電流只用，機械壽(shou)命≥2000次。

三、使用條件

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

2.海拔不超過1000m，風速不大于(yu)35m/s

3.熔斷(duan)器不適用于下述場所(suo)

3.1有燃料或爆炸危險的(de)場所。

3.2有(you)劇烈(lie)震動或沖擊(ji)的場所(suo)。

3.3有異(yi)電化學(xue)氣(qi)體作用及嚴重空氣(qi)污穢，煙霧地區(qu)。

四、結構簡介

    熔(rong)(rong)斷器(qi)是(shi)由(you)基座(zuo)和消弧(hu)裝置(zhi)兩大(da)部分組成，滅弧(hu)管下端裝有可能轉動的(de)彈簧(huang)支架，始(shi)終使(shi)熔(rong)(rong)絲(si)處于緊(jin)張狀態(tai)，以保證滅弧(hu)管在合閘(zha)位置(zhi)的(de)自鎖，線路與(yu)變壓器(qi)過(guo)載或短(duan)路中(zhong)，熔(rong)(rong)絲(si)熔(rong)(rong)斷，熔(rong)(rong)絲(si)迅速從滅弧(hu)管中(zhong)抽出，滅弧(hu)管設計為逐級排氣式解決在同一熔(rong)(rong)斷器(qi)上開斷大(da)小電流的(de)矛盾。

五、型號(hao)說(shuo)明

六、主(zhu)要技術(shu)參數

七、外形及安裝尺寸(cun)