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跌落式熔断器RW11-35/100




跌落式熔断器RW11-35/100


一、概述


跌(die)落(luo)式(shi)熔(rong)断(duan)器(qi)及(ji)拉(la)(la)负(fu)荷跌(die)落(luo)式(shi)熔(rong)断(duan)器(qi)是(shi)户(hu)外高压保护(hu)电器(qi)。它装(zhuang)置(zhi)在(zai)配(pei)电变压器(qi)高压侧或(huo)配(pei)电线支干线路上、用(yong)作变压器(qi)和(he)线路的(de)短路、过载保护(hu)及(ji)分、合负(fu)荷电流。跌(die)落(luo)式(shi)熔(rong)断(duan)器(qi)由绝(jue)缘支架和(he)熔(rong)丝(si)(si)管(guan)二部分组(zu)成,静触头(tou)安装(zhuang)在(zai)绝(jue)缘支架两(liang)端,动触头(tou)安装(zhuang)在(zai)熔(rong)丝(si)(si)管(guan)两(liang)端,熔(rong)丝(si)(si)管(guan)由内层(ceng)的(de)消弧(hu)管(guan)和(he)外层(ceng)的(de)酚醛纸管(guan)或(huo)环(huan)氧玻璃布管(guan)组(zu)成。拉(la)(la)负(fu)荷跌(die)落(luo)式(shi)熔(rong)断(duan)器(qi)增强弹性辅(fu)助(zhu)触头(tou)及(ji)灭(mie)弧(hu)罩,用(yong)以分,合负(fu)荷电流。

跌落式熔(rong)断(duan)器在(zai)正常运行时(shi),熔(rong)丝(si)管(guan)(guan)借(jie)助熔(rong)丝(si)张(zhang)紧后(hou)形成闭合位置(zhi)。当系统发生(sheng)故障时(shi),故障电(dian)(dian)(dian)(dian)(dian)流时(shi)熔(rong)丝(si)迅(xun)速熔(rong)断(duan),并形成电(dian)(dian)(dian)(dian)(dian)弧(hu)(hu),消弧(hu)(hu)管(guan)(guan)受电(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)灼(zhuo)热,分解出大量(liang)的气(qi)体,使(shi)馆内形成很高压(ya)力,并沿管(guan)(guan)道形成纵吹,电(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)被(bei)(bei)迅(xun)速拉长而(er)熄灭(mie)。熔(rong)丝(si)熔(rong)断(duan)后(hou),下部(bu)动(dong)(dong)触(chu)头(tou)(tou)失去张(zhang)力二下翻,锁(suo)紧机械,释放(fang)熔(rong)丝(si)管(guan)(guan),熔(rong)丝(si)管(guan)(guan)跌落,形成明显的开断(duan)位置(zhi)。当需要拉负(fu)荷时(shi),用绝缘(yuan)杆拉开动(dong)(dong)触(chu)头(tou)(tou),此时(shi)主动(dong)(dong)、静动(dong)(dong)触(chu)头(tou)(tou)仍然接触(chu),继续用绝缘(yuan)杆拉动(dong)(dong)触(chu)头(tou)(tou),辅助触(chu)头(tou)(tou)也分离,在(zai)辅助触(chu)头(tou)(tou)之间产(chan)生(sheng)电(dian)(dian)(dian)(dian)(dian)弧(hu)(hu),电(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)在(zai)灭(mie)罩狭缝(feng)中被(bei)(bei)拉长,同时(shi)灭(mie)弧(hu)(hu)罩产(chan)生(sheng)气(qi)体,在(zai)电(dian)(dian)(dian)(dian)(dian)流过(guo)零时(shi),将(jiang)电(dian)(dian)(dian)(dian)(dian)弧(hu)(hu)熄灭(mie)。 


二、用途


户外(wai)跌(die)落式熔(rong)断器适用(yong)(yong)于35kv及以(yi)下电压(ya)频率50Hz电力系统(tong)中,作输电线路、电力变压(ya)器过载(zai)和短路保护(hu),分合额定负(fu)荷电流只用(yong)(yong),机械寿命≥2000次(ci)。 


三、使用条件


1.适(shi)用于环境温度(du)上(shang)限(xian)40℃,下限(xian)-30℃之内。

2.海拔不超过(guo)1000m,风速(su)不大于35m/s

3.熔断器(qi)不适用于下述场所

3.1有(you)燃料或爆炸危(wei)险的场(chang)所(suo)。

3.2有剧烈震动或冲击的场所。

3.3有(you)异电(dian)化(hua)学气体作用及严重空气污(wu)秽,烟雾地区(qu)。 


四、结构简介


熔(rong)(rong)断(duan)器(qi)是由基座(zuo)和消弧(hu)装置(zhi)两大(da)部分组成(cheng),灭(mie)(mie)(mie)弧(hu)管(guan)(guan)下端装有可能转动的弹(dan)簧支架,始(shi)终使熔(rong)(rong)丝(si)处(chu)于紧张状态,以保(bao)证灭(mie)(mie)(mie)弧(hu)管(guan)(guan)在(zai)合闸位(wei)置(zhi)的自锁,线(xian)路与变压器(qi)过(guo)载或(huo)短路中(zhong),熔(rong)(rong)丝(si)熔(rong)(rong)断(duan),熔(rong)(rong)丝(si)迅速从灭(mie)(mie)(mie)弧(hu)管(guan)(guan)中(zhong)抽出,灭(mie)(mie)(mie)弧(hu)管(guan)(guan)设计为逐级(ji)排气(qi)式解决在(zai)同一(yi)熔(rong)(rong)断(duan)器(qi)上开断(duan)大(da)小(xiao)电流(liu)的矛盾。 

 




 
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