母(mu)線(xian)(xian)槽封閉母(mu)線(xian)(xian)槽（以下簡稱母(mu)線(xian)(xian)槽）是(shi)由金屬板（鋼(gang)板或鋁(lv)板）作為檢修外殼、導電(dian)條、絕緣(yuan)材(cai)料及相關附件組成的母(mu)線(xian)(xian)系統。實用新型可制(zhi)成間(jian)(jian)隔有插入式(shi)接線(xian)(xian)盒(he)的插入式(shi)封閉母(mu)線(xian)(xian)，或中間(jian)(jian)無接線(xian)(xian)盒(he)的饋電(dian)封閉式(shi)母(mu)線(xian)(xian)。

在(zai)高層(ceng)建筑(zhu)的供電系(xi)統中，電源(yuan)線(xian)(xian)和(he)照明線(xian)(xian)往往分(fen)開設(she)置。母(mu)(mu)(mu)(mu)線(xian)(xian)槽(cao)作為主供電線(xian)(xian)路，在(zai)電氣豎井內沿墻(qiang)壁直(zhi)線(xian)(xian)安裝一次(ci)或(huo)多次(ci)。根據用途，一趟母(mu)(mu)(mu)(mu)線(xian)(xian)槽(cao)一般由(you)啟動母(mu)(mu)(mu)(mu)線(xian)(xian)槽(cao)、直(zhi)型(xing)(xing)母(mu)(mu)(mu)(mu)線(xian)(xian)槽(cao)（帶(dai)插孔和(he)不帶(dai)插孔）、L型(xing)(xing)直(zhi)（橫）彎母(mu)(mu)(mu)(mu)線(xian)(xian)、Z型(xing)(xing)直(zhi)（橫）偏(pian)置母(mu)(mu)(mu)(mu)線(xian)(xian)、T型(xing)(xing)直(zhi)（橫）三通母(mu)(mu)(mu)(mu)線(xian)(xian)、X型(xing)(xing)直(zhi)（橫）四通母(mu)(mu)(mu)(mu)線(xian)(xian)、變容母(mu)(mu)(mu)(mu)線(xian)(xian)槽(cao)、擴展(zhan)母(mu)(mu)(mu)(mu)線(xian)(xian)槽(cao)、接(jie)(jie)線(xian)(xian)頭、端子接(jie)(jie)線(xian)(xian)盒、插接(jie)(jie)盒母(mu)(mu)(mu)(mu)線(xian)(xian)槽(cao)由(you)相關附件和(he)緊固(gu)裝置組成(cheng).

母(mu)(mu)線(xian)(xian)槽(cao)(cao)按絕緣(yuan)(yuan)(yuan)方式可分為(wei)(wei)空(kong)氣插入(ru)式母(mu)(mu)線(xian)(xian)槽(cao)(cao)、密(mi)絕緣(yuan)(yuan)(yuan)插入(ru)式母(mu)(mu)線(xian)(xian)槽(cao)(cao)和(he)(he)高強度插入(ru)式母(mu)(mu)線(xian)(xian)槽(cao)(cao)。按其結構和(he)(he)用(yong)途分為(wei)(wei)致密(mi)絕緣(yuan)(yuan)(yuan)、空(kong)氣絕緣(yuan)(yuan)(yuan)、空(kong)氣附加絕緣(yuan)(yuan)(yuan)、耐火、樹脂絕緣(yuan)(yuan)(yuan)和(he)(he)滑動接觸母(mu)(mu)線(xian)(xian)槽(cao)(cao)；按外殼(ke)材(cai)料(liao)分為(wei)(wei)鋼殼(ke)、鋁合(he)金(jin)殼(ke)和(he)(he)鋼鋁混合(he)殼(ke)母(mu)(mu)線(xian)(xian)槽(cao)(cao)。