單芯電纜線與多芯電纜線的差別
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來源：金環宇電纜發布日期(qi)：2020-07-29 09:57
單芯(xin)(xin)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)線(xian)：路線(xian)較(jiao)長，工作中電(dian)(dian)(dian)(dian)流量很大(da)的(de)控制(zhi)回(hui)路或水中鋪(pu)設(she)時(shi)，為防止(zhi)或降(jiang)低正中間(jian)連(lian)接頭，或單芯(xin)(xin)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)線(xian)比(bi)多芯(xin)(xin)式電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)線(xian)有不錯的(de)綜(zong)合性安全工程時(shi)，可采(cai)用(yong)單芯(xin)(xin)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)線(xian)。可用(yong)底(di)壓直(zhi)流電(dian)(dian)(dian)(dian)供(gong)電(dian)(dian)(dian)(dian)系統控制(zhi)回(hui)路，當必須時(shi)可選(xuan)用(yong)單芯(xin)(xin)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)線(xian)。
2芯電(dian)纜(lan)(lan)線(xian)：1kV及下列開關電(dian)源(yuan)中(zhong)性(xing)線(xian)立即(ji)接(jie)地裝(zhuang)置時(shi)，單(dan)相電(dian)控制(zhi)回(hui)路(lu)的(de)電(dian)纜(lan)(lan)線(xian)芯數(shu)，當維(wei)護線(xian)和中(zhong)性(xing)點共用(yong)同一電(dian)導體時(shi)，應選用(yong)2芯電(dian)纜(lan)(lan)線(xian)。可用(yong)直流電(dian)供電(dian)系統控制(zhi)回(hui)路(lu)，宜(yi)選用(yong)2芯電(dian)纜(lan)(lan)線(xian)。
3芯(xin)(xin)電纜(lan)線：1kV以(yi)及下列(lie)開(kai)關(guan)電源中性(xing)線立(li)即接地(di)裝置時，單相電控制(zhi)回路的電纜(lan)線芯(xin)(xin)數為：當維護線和(he)中性(xing)點各(ge)有單獨時，宜選(xuan)用3芯(xin)(xin)電纜(lan)線。
4芯電(dian)(dian)纜線(xian)：1kV及下列的(de)4芯電(dian)(dian)纜線(xian)(3+1電(dian)(dian)纜線(xian))，在其中的(de)第(di)四芯除(chu)做為接(jie)地保護外，也要運輸(shu)供(gong)電(dian)(dian)系統(tong)不在均衡電(dian)(dian)流量及短路容量。它(ta)的(de)尺(chi)寸由不平衡電(dian)(dian)流量及短路容量來明確，但一般不可低(di)于相線(xian)的(de)1/2。
5芯電(dian)(dian)纜線(xian)：1kV以及下列(lie)的三相四線(xian)制配電(dian)(dian)房(fang)(fang)系統(tong)軟(ruan)件，一(yi)些安全系數規(gui)定(ding)較高的電(dian)(dian)氣裝置(zhi)配電(dian)(dian)設備路線(xian)，及其一(yi)些既(ji)要確保(bao)用電(dian)(dian)安全，又(you)要抗干擾(rao)性接地(di)裝置(zhi)的通訊管理中心和自(zi)動化機械，宜選用5銅芯電(dian)(dian)纜的TN-C配電(dian)(dian)房(fang)(fang)系統(tong)軟(ruan)件，使維(wei)護(hu)線(xian)(PE線(xian))和中性點(PN線(xian))各有單獨，纜芯截面一(yi)般(ban)為3大2小或4大1小或5大。
4芯電纜線與3+1芯電纜線的差別：1kV以及下列三相四線制配電房系統軟件，當維護線和中性點共用同一電導體時，應選用4芯電纜線，而不可選用3芯電纜線加單芯電纜線組成一回路的方法，乃至立即運用3芯電纜線的金屬材料護線套或鎧裝電纜層等(deng)作中性點的(de)方(fang)法。不然，當3相電流不平衡時，等(deng)同于單芯電纜線的(de)運作情況，非常容易(yi)造成直流影響。
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