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【令克】HRW12-10KV/100A 羿振電氣有限公司

其(qi)選擇是(shi)按照額(e)(e)定電(dian)壓(ya)和額(e)(e)定電(dian)流(liu)兩(liang)項(xiang)參數進(jin)行(xing)，也就是(shi)熔(rong)(rong)(rong)(rong)斷(duan)(duan)器的(de)(de)(de)額(e)(e)定電(dian)壓(ya)必(bi)(bi)須(xu)與被保(bao)護(hu)設(she)備(線路(lu))的(de)(de)(de)額(e)(e)定電(dian)壓(ya)相(xiang)匹配。熔(rong)(rong)(rong)(rong)斷(duan)(duan)器具的(de)(de)(de)額(e)(e)定電(dian)流(liu)應大于(yu)或等于(yu)熔(rong)(rong)(rong)(rong)體(ti)的(de)(de)(de)額(e)(e)定電(dian)流(liu)。而熔(rong)(rong)(rong)(rong)體(ti)的(de)(de)(de)額(e)(e)定電(dian)流(liu)可選為額(e)(e)定負荷電(dian)流(liu)的(de)(de)(de)1.5～2倍。 　　此外，應按被保(bao)護(hu)系統三相(xiang)短路(lu)容量(liang)(liang)(liang)(liang)，對(dui)所選定的(de)(de)(de)熔(rong)(rong)(rong)(rong)斷(duan)(duan)器進(jin)行(xing)校核。保(bao)證被保(bao)護(hu)系統三相(xiang)短路(lu)容量(liang)(liang)(liang)(liang)小(xiao)于(yu)熔(rong)(rong)(rong)(rong)斷(duan)(duan)器額(e)(e)定斷(duan)(duan)開(kai)容量(liang)(liang)(liang)(liang)的(de)(de)(de)上(shang)限(xian)，但(dan)必(bi)(bi)須(xu)大于(yu)額(e)(e)定斷(duan)(duan)開(kai)容量(liang)(liang)(liang)(liang)的(de)(de)(de)下限(xian)。若熔(rong)(rong)(rong)(rong)斷(duan)(duan)器的(de)(de)(de)額(e)(e)定斷(duan)(duan)開(kai)容量(liang)(liang)(liang)(liang)(一(yi)般是(shi)指其(qi)上(shang)限(xian))過大，很可能(neng)使被保(bao)護(hu)系統三相(xiang)短路(lu)容量(liang)(liang)(liang)(liang)小(xiao)于(yu)熔(rong)(rong)(rong)(rong)斷(duan)(duan)器額(e)(e)定斷(duan)(duan)開(kai)容量(liang)(liang)(liang)(liang)的(de)(de)(de)下限(xian)，造成在熔(rong)(rong)(rong)(rong)體(ti)熔(rong)(rong)(rong)(rong)斷(duan)(duan)時難以(yi)滅弧，終(zhong)引起熔(rong)(rong)(rong)(rong)管燒毀，等事故。

對上述項目檢(jian)查(cha)出的(de)缺(que)陷一定要認真檢(jian)修處(chu)理。跌(die)落(luo)式(shi)熔(rong)(rong)(rong)斷(duan)器及(ji)拉負荷(he)跌(die)落(luo)式(shi)熔(rong)(rong)(rong)斷(duan)器是戶外高(gao)壓(ya)(ya)保護電器。它裝置在配電變(bian)壓(ya)(ya)器高(gao)壓(ya)(ya)側或配電線(xian)支(zhi)(zhi)干線(xian)路上，用(yong)作變(bian)壓(ya)(ya)器和(he)線(xian)路的(de)短路、過(guo)載保護及(ji)分(fen)、合(he)負荷(he)電流。跌(die)落(luo)式(shi)熔(rong)(rong)(rong)斷(duan)器由絕緣(yuan)(yuan)支(zhi)(zhi)架和(he)熔(rong)(rong)(rong)絲(si)管(guan)二部分(fen)組成，靜觸頭安裝在絕緣(yuan)(yuan)支(zhi)(zhi)架兩(liang)端，動觸頭安裝在熔(rong)(rong)(rong)絲(si)管(guan)兩(liang)端絲(si)管(guan)由層(ceng)的(de)消弧(hu)管(guan)和(he)外層(ceng)的(de)環氧(yang)玻璃管(guan)組成。 拉負荷(he)跌(die)落(luo)式(shi)熔(rong)(rong)(rong)斷(duan)器增加彈(dan)性輔助觸頭及(ji)滅弧(hu)罩，用(yong)以分(fen)、合(he)負荷(he)電流。跌(die)落(luo)式(shi)熔(rong)(rong)(rong)斷(duan)器在正(zheng)常運(yun)行時，熔(rong)(rong)(rong)絲(si)管(guan)借助熔(rong)(rong)(rong)絲(si)張緊后形(xing)成閉合(he)位置。