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跌落式熔断器RW4-10/100A




跌落式熔断器RW4-10/100A

一、概述


跌(die)落(luo)式熔(rong)断(duan)器(qi)(qi)及(ji)拉负荷跌(die)落(luo)式熔(rong)断(duan)器(qi)(qi)是户外高压(ya)保护电器(qi)(qi)。它(ta)装置在配(pei)电变(bian)压(ya)器(qi)(qi)高压(ya)侧或(huo)配(pei)电线(xian)支(zhi)干线(xian)路上、用作变(bian)压(ya)器(qi)(qi)和线(xian)路的短路、过(guo)载(zai)保护及(ji)分(fen)、合(he)负荷电流。跌(die)落(luo)式熔(rong)断(duan)器(qi)(qi)由绝(jue)缘支(zhi)架和熔(rong)丝管(guan)(guan)二部分(fen)组成,静触(chu)头安装在绝(jue)缘支(zhi)架两(liang)端,动触(chu)头安装在熔(rong)丝管(guan)(guan)两(liang)端,熔(rong)丝管(guan)(guan)由内层的消(xiao)弧(hu)管(guan)(guan)和外层的酚醛纸管(guan)(guan)或(huo)环氧(yang)玻璃布管(guan)(guan)组成。拉负荷跌(die)落(luo)式熔(rong)断(duan)器(qi)(qi)增强(qiang)弹性辅(fu)助触(chu)头及(ji)灭弧(hu)罩,用以分(fen),合(he)负荷电流。

跌落式(shi)熔(rong)(rong)断器在(zai)正常运行时(shi)(shi)(shi),熔(rong)(rong)丝(si)管(guan)(guan)借助熔(rong)(rong)丝(si)张紧后(hou)形(xing)成闭合(he)位置(zhi)。当系统发生故(gu)障(zhang)时(shi)(shi)(shi),故(gu)障(zhang)电流(liu)时(shi)(shi)(shi)熔(rong)(rong)丝(si)迅速熔(rong)(rong)断,并(bing)形(xing)成电弧(hu)(hu),消(xiao)弧(hu)(hu)管(guan)(guan)受电弧(hu)(hu)灼热,分(fen)解出大量的气(qi)体(ti),使馆内形(xing)成很(hen)高(gao)压力(li)(li),并(bing)沿管(guan)(guan)道形(xing)成纵吹,电弧(hu)(hu)被迅速拉(la)长而熄灭。熔(rong)(rong)丝(si)熔(rong)(rong)断后(hou),下(xia)部动(dong)(dong)(dong)触(chu)(chu)头(tou)(tou)失去(qu)张力(li)(li)二下(xia)翻(fan),锁紧机械,释放(fang)熔(rong)(rong)丝(si)管(guan)(guan),熔(rong)(rong)丝(si)管(guan)(guan)跌落,形(xing)成明显(xian)的开断位置(zhi)。当需要拉(la)负荷时(shi)(shi)(shi),用绝缘杆拉(la)开动(dong)(dong)(dong)触(chu)(chu)头(tou)(tou),此时(shi)(shi)(shi)主动(dong)(dong)(dong)、静动(dong)(dong)(dong)触(chu)(chu)头(tou)(tou)仍然(ran)接(jie)触(chu)(chu),继(ji)续用绝缘杆拉(la)动(dong)(dong)(dong)触(chu)(chu)头(tou)(tou),辅(fu)助触(chu)(chu)头(tou)(tou)也分(fen)离,在(zai)辅(fu)助触(chu)(chu)头(tou)(tou)之(zhi)间产生电弧(hu)(hu),电弧(hu)(hu)在(zai)灭罩狭缝中(zhong)被拉(la)长,同时(shi)(shi)(shi)灭弧(hu)(hu)罩产生气(qi)体(ti),在(zai)电流(liu)过零时(shi)(shi)(shi),将电弧(hu)(hu)熄灭。 


二、用途


户外跌落式熔(rong)断(duan)器(qi)适用(yong)于35kv及以(yi)下电(dian)压频率50Hz电(dian)力(li)系统(tong)中,作输电(dian)线路、电(dian)力(li)变压器(qi)过载(zai)和短路保护,分合额定负荷电(dian)流只用(yong),机(ji)械寿命≥2000次。 


三、使用条件


1.适用于环(huan)境温度(du)上限(xian)40℃,下限(xian)-30℃之内。

2.海拔不超过1000m,风速不大于35m/s

3.熔断(duan)器不适用于下述场所

3.1有燃料(liao)或爆炸危险的场所。

3.2有剧烈震动或(huo)冲(chong)击的场所。

3.3有异电化学(xue)气体作用及(ji)严重空(kong)气污(wu)秽,烟雾地区。 


四、结构简介


熔(rong)断器(qi)是由基座和消弧(hu)装(zhuang)置两(liang)大(da)(da)部分组成,灭弧(hu)管(guan)下端(duan)装(zhuang)有(you)可(ke)能转动(dong)的弹簧支架,始终(zhong)使熔(rong)丝处(chu)于(yu)紧张状态,以保证(zheng)灭弧(hu)管(guan)在合闸位置的自锁,线路与变压器(qi)过(guo)载(zai)或短路中(zhong),熔(rong)丝熔(rong)断,熔(rong)丝迅(xun)速从灭弧(hu)管(guan)中(zhong)抽出,灭弧(hu)管(guan)设计为逐级(ji)排气式解决(jue)在同一熔(rong)断器(qi)上开断大(da)(da)小电(dian)流(liu)的矛(mao)盾(dun)。 

 




 
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