一(yi). 作(zuo)(zuo)用(yong)(yong)不同(tong)：動力母線(xian)的(de)主(zhu)要(yao)作(zuo)(zuo)用(yong)(yong)是分配(pei)電(dian)(dian)(dian)流，能夠接收大電(dian)(dian)(dian)流并(bing)將(jiang)其分配(pei)到各個支路上，通(tong)常(chang)由鋁材(cai)制成(cheng)(cheng)；而(er)(er)電(dian)(dian)(dian)力電(dian)(dian)(dian)纜的(de)主(zhu)要(yao)作(zuo)(zuo)用(yong)(yong)是傳(chuan)輸電(dian)(dian)(dian)力，通(tong)常(chang)應(ying)用(yong)(yong)于三(san)相電(dian)(dian)(dian)路中，由三(san)芯以上的(de)電(dian)(dian)(dian)線(xian)組合而(er)(er)成(cheng)(cheng)，用(yong)(yong)于將(jiang)電(dian)(dian)(dian)力或信(xin)號從一處傳(chuan)輸到另一處。

二. 電(dian)(dian)流(liu)承(cheng)載能力(li)(li)：電(dian)(dian)纜的承(cheng)載能力(li)(li)相對較小，而動力(li)(li)母(mu)線的承(cheng)載能力(li)(li)大很多，這是因(yin)為(wei)母(mu)線采用(yong)銅或鋁，具(ju)有較大的電(dian)(dian)流(liu)密(mi)度和較小的電(dian)(dian)阻(zu)，相比之下，電(dian)(dian)纜在相同電(dian)(dian)流(liu)等級下需要更(geng)大的面積，減(jian)少了電(dian)(dian)流(liu)額定(ding)值(zhi)，增加(jia)了電(dian)(dian)壓(ya)降，容易發熱和老化。

三. 使(shi)用特(te)點：母線是(shi)剛性的，不能(neng)彎曲(qu)，而電纜(lan)是(shi)柔性的，可以彎曲(qu)。這(zhe)使(shi)得電纜(lan)在安裝時較為麻煩(fan)，需要使(shi)用套管或(huo)線槽(cao)放線接(jie)線，而母線的安裝則相對靈(ling)活(huo)，不容易出現錯誤。
四. 應用(yong)場(chang)景(jing)：動力(li)母線(xian)作(zuo)為一種(zhong)新型配電(dian)(dian)(dian)導線(xian)，在大電(dian)(dian)(dian)流(liu)輸送時充分體現出其(qi)優越性，特(te)別是在工(gong)業廠房及動力(li)設(she)備處作(zuo)為供(gong)電(dian)(dian)(dian)主(zhu)干線(xian)使用(yong)；而電(dian)(dian)(dian)纜則廣泛應用(yong)于(yu)各種(zhong)電(dian)(dian)(dian)氣設(she)備和系(xi)統中，包括電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜、控制電(dian)(dian)(dian)纜、補償電(dian)(dian)(dian)纜等(deng)，它(ta)們都是由單(dan)股或多(duo)股導線(xian)和絕緣層組成，用(yong)來連(lian)接電(dian)(dian)(dian)路、電(dian)(dian)(dian)器等(deng)。

綜上所述(shu)，動力母線(xian)和電力電纜在作用(yong)(yong)、電流承載(zai)能力、使(shi)用(yong)(yong)特點(dian)和應用(yong)(yong)場景(jing)等方(fang)面存在明(ming)顯的(de)區(qu)別。