国产69精品9999XXXX_亚洲第一成人网站_亚洲国产精品99久久久久久_狠狠色噜噜狠狠狠狠97

所謂插接(jie)(jie)式密集型母線(xian)(xian)(xian)(xian)槽，就是(shi)它(ta)利用(yong)插接(jie)(jie)的(de)方式把(ba)主干(gan)線(xian)(xian)(xian)(xian)的(de)電(dian)源(yuan)分(fen)(fen)接(jie)(jie)到支(zhi)線(xian)(xian)(xian)(xian)中去，因(yin)此分(fen)(fen)接(jie)(jie)十分(fen)(fen)方便。電(dian)纜要分(fen)(fen)接(jie)(jie)十分(fen)(fen)麻煩，例(li)如高(gao)層(ceng)(ceng)建筑的(de)配電(dian)，過去把(ba)電(dian)纜每三層(ceng)(ceng)切斷一次，在(zai)層(ceng)(ceng)樓(lou)(lou)總開(kai)關上并頭(tou)分(fen)(fen)出電(dian)源(yuan)，此電(dian)源(yuan)供三個樓(lou)(lou)面用(yong)電(dian)。這種配電(dian)方式有很多缺(que)點：①層(ceng)(ceng)樓(lou)(lou)總開(kai)關的(de)端(duan)子(zi)無法聯結(jie)電(dian)纜干(gan)線(xian)(xian)(xian)(xian)的(de)接(jie)(jie)線(xian)(xian)(xian)(xian)端(duan)子(zi)，必須增加(jia)用(yong)銅排做(zuo)的(de)接(jie)(jie)線(xian)(xian)(xian)(xian)端(duan)子(zi)，供電(dian)纜主干(gan)線(xian)(xian)(xian)(xian)切斷后并頭(tou)，并和層(ceng)(ceng)樓(lou)(lou)總開(kai)關的(de)端(duan)子(zi)相連；②電(dian)纜并頭(tou)的(de)螺(luo)栓(shuan)一旦松動，就會(hui)造(zao)(zao)成其他樓(lou)(lou)面斷電(dian)；③主干(gan)線(xian)(xian)(xian)(xian)的(de)一個分(fen)(fen)支(zhi)線(xian)(xian)(xian)(xian)，要分(fen)(fen)接(jie)(jie)到三個樓(lou)(lou)面，因(yin)此電(dian)纜增加(jia)，造(zao)(zao)成線(xian)(xian)(xian)(xian)路壓降增加(jia)，故障點增加(jia)。

若任(ren)何一個樓面需要切斷(duan)(duan)電(dian)源(yuan)，母線槽(cao)無須斷(duan)(duan)電(dian)，只(zhi)要在(zai)空(kong)載的情(qing)況下(xia)(xia)，取下(xia)(xia)母線槽(cao)的插(cha)接(jie)箱即可。但要切斷(duan)(duan)電(dian)纜的分支電(dian)源(yuan)，在(zai)帶電(dian)的情(qing)況下(xia)(xia)操作是十分危險(xian)的。

插接(jie)式(shi)密集型母線槽(cao)(cao)的(de)過載能(neng)力(li)強，在(zai)于它用(yong)(yong)的(de)絕(jue)緣材(cai)(cai)(cai)料(liao)(liao)工(gong)(gong)作溫(wen)(wen)度(du)高。國外(wai)公司(si)的(de)母線槽(cao)(cao)，所采用(yong)(yong)的(de)絕(jue)緣材(cai)(cai)(cai)料(liao)(liao)工(gong)(gong)作溫(wen)(wen)度(du)為130℃，國產母線槽(cao)(cao)用(yong)(yong)的(de)絕(jue)緣材(cai)(cai)(cai)料(liao)(liao)過去采用(yong)(yong)工(gong)(gong)作溫(wen)(wen)度(du)為105℃的(de)材(cai)(cai)(cai)料(liao)(liao)，現在(zai)不少(shao)廠采用(yong)(yong)工(gong)(gong)作溫(wen)(wen)度(du)為130℃以上的(de)輻(fu)(fu)照交聯阻燃(ran)纏(chan)繞(rao)帶(dai)(PER)和輻(fu)(fu)照交聯聚(ju)烯烴熱收縮套管。而電纜(lan)所用(yong)(yong)的(de)絕(jue)緣材(cai)(cai)(cai)料(liao)(liao)長(chang)期工(gong)(gong)作溫(wen)(wen)度(du)一(yi)般為95℃和105℃，因此母線槽(cao)(cao)的(de)過載能(neng)力(li)遠(yuan)遠(yuan)大予電纜(lan)。