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熔断器 HRW12-10/100A




熔断器 HRW12-10/100A

HRW12-10/100A,交流(liu)熔断器静触(chu)头安装在绝缘(yuan)支架两端(duan)HRW12-10/100A,交流(liu)熔断器


  概述:


  跌落(luo)式熔断(duan)器是配电(dian)线(xian)(xian)路(lu)分(fen)支线(xian)(xian)和(he)配电(dian)变压器常(chang)见(jian)的(de)(de)一种(zhong)短路(lu)保护(hu)开(kai)关。它(ta)具有(you)经济、操作(zuo)(zuo)方便、适应户外环(huan)境性(xing)强等特点,被(bei)广泛应用于配电(dian)线(xian)(xian)路(lu)和(he)配电(dian)变压器一次侧(ce)作(zuo)(zuo)为(wei)保护(hu)和(he)进行设(she)备投、切操作(zuo)(zuo)之用。安(an)装在(zai)配电(dian)线(xian)(xian)路(lu)分(fen)支上,可(ke)缩小停电(dian)范(fan)围。因(yin)其有(you)一个(ge)明(ming)显的(de)(de)断(duan)开(kai)点,具有(you)了隔(ge)离开(kai)关的(de)(de)功能(neng),给检修(xiu)(xiu)线(xian)(xian)路(lu)和(he)设(she)备创(chuang)造(zao)了一个(ge)安(an)全作(zuo)(zuo)业环(huan)境,增加了检修(xiu)(xiu)人员的(de)(de)安(an)全性(xing)。带拉负荷(he)的(de)(de)跌落(luo)式熔断(duan)器,还配有(you)弹性(xing)辅助触头和(he)灭弧罩,用以分(fen)合(he)额(e)定负荷(he)电(dian)流。


  一、用途


  HRW12-10/100A,交流(liu)熔断(duan)器(qi)(qi)(qi)保证具有较强防腐性能HRW12-10/100A,交流(liu)熔断(duan)器(qi)(qi)(qi)跌落(luo)式熔断(duan)器(qi)(qi)(qi)及(ji)拉(la)负荷跌落(luo)式熔断(duan)器(qi)(qi)(qi)是户外高(gao)压保护(hu)电器(qi)(qi)(qi),它(ta)装配(pei)在配(pei)电变(bian)压器(qi)(qi)(qi)高(gao)压侧或配(pei)电线(xian)支干线(xian)路上,作输电线(xian)路、电力变(bian)压器(qi)(qi)(qi)过载和短(duan)路保护(hu)及(ji)分(fen)合额(e)定(ding)负荷电流(liu)之用。


  跌落式熔断器是配(pei)(pei)电(dian)(dian)(dian)(dian)线路(lu)分支线和配(pei)(pei)电(dian)(dian)(dian)(dian)变(bian)(bian)(bian)压(ya)(ya)(ya)器常用(yong)的一(yi)种短路(lu)保护(hu)(hu)开关,它具(ju)有经济、操作方便、适(shi)应(ying)户外环境(jing)性(xing)强等特点,被广(guang)泛应(ying)用(yong)于35kV配(pei)(pei)电(dian)(dian)(dian)(dian)线路(lu)和配(pei)(pei)电(dian)(dian)(dian)(dian)变(bian)(bian)(bian)压(ya)(ya)(ya)器一(yi)次(ci)侧作为(wei)保护(hu)(hu)和进行设(she)备投、切操作之(zhi)用(yong)。它安装(zhuang)在35kV配(pei)(pei)电(dian)(dian)(dian)(dian)线路(lu)分支线上,可(ke)缩小(xiao)停电(dian)(dian)(dian)(dian)范围,因(yin)其(qi)有一(yi)个(ge)明显的断开点,具(ju)备了(le)(le)隔(ge)离开关的功能,给检修(xiu)段线路(lu)和设(she)备创造了(le)(le)一(yi)个(ge)安全作业环境(jing),增(zeng)加了(le)(le)检修(xiu)人员(yuan)的安全感。安装(zhuang)在配(pei)(pei)电(dian)(dian)(dian)(dian)变(bian)(bian)(bian)压(ya)(ya)(ya)器上,可(ke)以作为(wei)配(pei)(pei)电(dian)(dian)(dian)(dian)变(bian)(bian)(bian)压(ya)(ya)(ya)器的主(zhu)保护(hu)(hu),所以,在35kV配(pei)(pei)电(dian)(dian)(dian)(dian)线路(lu)和配(pei)(pei)电(dian)(dian)(dian)(dian)变(bian)(bian)(bian)压(ya)(ya)(ya)器中得(de)到了(le)(le)普及。


  二、结构简介


  跌(die)落式熔断(duan)器由绝(jue)缘(yuan)支(zhi)(zhi)架(jia)和熔丝管(guan)两大部分组(zu)成,静触(chu)头安装(zhuang)在绝(jue)缘(yuan)支(zhi)(zhi)架(jia)的两端,动触(chu)头安装(zhuang)在熔丝管(guan)的两端,熔丝管(guan)由内层的消弧管(guan)和外层环氧玻璃管(guan)组(zu)成。拉负(fu)荷跌(die)落式熔断(duan)


  器增加(jia)弹性辅助头及(ji)灭弧罩,用以(yi)分(fen)、合(he)(he)负(fu)荷电(dian)流(liu)。跌落(luo)式熔(rong)(rong)断器在(zai)正常运(yun)行(xing)时,熔(rong)(rong)丝(si)管(guan)借助熔(rong)(rong)丝(si)张(zhang)紧(jin)后(hou)形(xing)(xing)成(cheng)闭合(he)(he)位置。当系统发生(sheng)故(gu)障时,故(gu)障电(dian)流(liu)使熔(rong)(rong)丝(si)迅(xun)速熔(rong)(rong)断,并(bing)形(xing)(xing)成(cheng)电(dian)弧,消(xiao)弧管(guan)受电(dian)弧灼热,分(fen)解出大量的(de)气体(ti),使管(guan)内形(xing)(xing)成(cheng)很(hen)高(gao)压力,并(bing)沿管(guan)道形(xing)(xing)成(cheng)纵吹,电(dian)弧被(bei)迅(xun)速拉(la)(la)(la)长而熄灭。熔(rong)(rong)丝(si)熔(rong)(rong)断后(hou),下部(bu)动(dong)触(chu)头失去张(zhang)力而下翻,锁紧(jin)机构释放熔(rong)(rong)丝(si)管(guan),熔(rong)(rong)丝(si)管(guan)跌落(luo),形(xing)(xing)成(cheng)明显的(de)开(kai)断位置。当需(xu)要(yao)要(yao)拉(la)(la)(la)负(fu)荷时,用绝(jue)缘杆(gan)拉(la)(la)(la)开(kai)动(dong)触(chu)头,此时主动(dong)、静助触(chu)头仍然(ran)接触(chu),继续(xu)用绝(jue)缘杆(gan)拉(la)(la)(la)动(dong)触(chu)头,辅助触(chu)头也(ye)分(fen)离,在(zai)辅助触(chu)头之(zhi)间产生(sheng)


  电(dian)弧(hu),电(dian)弧(hu)在灭(mie)弧(hu)罩狭缝中被拉长,同(tong)时灭(mie)弧(hu)罩产生(sheng)气体,在电(dian)流(liu)过零时,将电(dian)弧(hu)熄灭(mie)。


  三、熔丝的选择


  熔(rong)(rong)(rong)(rong)丝(si)的(de)(de)选择(ze)(ze)应(ying)能保(bao)证配电(dian)变(bian)压(ya)(ya)器(qi)内部(bu)或高(gao)、低压(ya)(ya)出线套管发(fa)生短(duan)路时能迅速熔(rong)(rong)(rong)(rong)断(duan)。实(shi)践中常按以下原(yuan)则选择(ze)(ze):配电(dian)变(bian)压(ya)(ya)器(qi)容量(liang)为160kVA以下的(de)(de),熔(rong)(rong)(rong)(rong)丝(si)按变(bian)压(ya)(ya)器(qi)额定电(dian)流的(de)(de)2~3倍(bei)来选;配电(dian)变(bian)压(ya)(ya)器(qi)容量(liang)为160kVA及以上的(de)(de),按1.5~2倍(bei)选择(ze)(ze)。熔(rong)(rong)(rong)(rong)丝(si)的(de)(de)选择(ze)(ze)还(hai)必需考虑(lv)熔(rong)(rong)(rong)(rong)丝(si)的(de)(de)熔(rong)(rong)(rong)(rong)断(duan)特(te)性能否与(yu)(yu)上级保(bao)护时间相配合,这是决定采用熔(rong)(rong)(rong)(rong)丝(si)保(bao)护能否生效的(de)(de)关键问题。配电(dian)线路的(de)(de)速断(duan)保(bao)护动作时间很短(duan),约为0.1s左(zuo)右。根据熔(rong)(rong)(rong)(rong)丝(si)的(de)(de)特(te)性曲线,在0.1s内使熔(rong)(rong)(rong)(rong)丝(si)熔(rong)(rong)(rong)(rong)断(duan)的(de)(de)电(dian)流应(ying)不(bu)小于额定电(dian)流的(de)(de)20倍(bei)。这一数据是保(bao)证熔(rong)(rong)(rong)(rong)丝(si)与(yu)(yu)首端断(duan)路器(qi)配合的(de)(de)必要(yao)条件。


  四、使用条件


  1、适用于户外


  2、环境温(wen)度:-40℃~40℃;


  3、海拔不超过1200m;


  4、风速不大(da)于35m/s;

 




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