電(dian)(dian)(dian)(dian)力(li)(li)電(dian)(dian)(dian)(dian)纜的基本結構由(you)線芯（導體(ti)）、絕(jue)緣層(ceng)、屏蔽層(ceng)和保護(hu)層(ceng)四(si)部分(fen)組成。電(dian)(dian)(dian)(dian)力(li)(li)電(dian)(dian)(dian)(dian)纜是用于傳輸和分(fen)配電(dian)(dian)(dian)(dian)能的電(dian)(dian)(dian)(dian)纜，電(dian)(dian)(dian)(dian)力(li)(li)電(dian)(dian)(dian)(dian)纜常(chang)用于城市地(di)下電(dian)(dian)(dian)(dian)網(wang)、發(fa)電(dian)(dian)(dian)(dian)站引出線路(lu)、工礦企(qi)業內部供電(dian)(dian)(dian)(dian)及過江(jiang)海(hai)水下輸電(dian)(dian)(dian)(dian)線。

  在(zai)電(dian)(dian)力(li)線路中(zhong)，電(dian)(dian)纜(lan)(lan)(lan)所占比(bi)重正逐漸增(zeng)加。電(dian)(dian)力(li)電(dian)(dian)纜(lan)(lan)(lan)是在(zai)電(dian)(dian)力(li)系統的(de)主干(gan)線路中(zhong)用以傳(chuan)輸(shu)和(he)分配大(da)功率(lv)電(dian)(dian)能的(de)電(dian)(dian)纜(lan)(lan)(lan)產品，包括1-500KV以及(ji)以上各種電(dian)(dian)壓等級，各種絕緣(yuan)的(de)電(dian)(dian)力(li)電(dian)(dian)纜(lan)(lan)(lan)。

按(an)電壓等級(ji)分

1、低(di)壓電(dian)纜：適用于固定(ding)敷設在交流50Hz，額(e)定(ding)電(dian)壓3kv及以下的輸配電(dian)線路(lu)上作輸送電(dian)能用。

2、中(zhong)低壓電(dian)纜(lan)：（一般指35KV及以下）：聚氯乙烯(xi)絕緣(yuan)電(dian)纜(lan)，聚乙烯(xi)絕緣(yuan)電(dian)纜(lan)，交聯聚乙烯(xi)絕緣(yuan)電(dian)纜(lan)等。

3、高壓(ya)電纜(lan)(lan)：（一般為(wei)110KV及以上）：聚乙(yi)烯(xi)電纜(lan)(lan)和交聯聚乙(yi)烯(xi)絕緣電纜(lan)(lan)等。

4、超高壓(ya)電纜：（275～800千伏）。

5、特高壓電纜(lan)：（1000千(qian)伏(fu)及以上）。