廣(guang)州電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜是用于傳輸和分配電(dian)(dian)(dian)能的電(dian)(dian)(dian)纜，電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜常用于城市地下電(dian)(dian)(dian)網(wang)、發電(dian)(dian)(dian)站引出線(xian)路、工礦企業(ye)內部供電(dian)(dian)(dian)及(ji)過江海水下輸電(dian)(dian)(dian)線(xian)。在(zai)電(dian)(dian)(dian)力(li)線(xian)路中(zhong)，電(dian)(dian)(dian)纜所占比重正(zheng)逐(zhu)漸(jian)增加。在(zai)電(dian)(dian)(dian)力(li)系(xi)統的主干線(xian)路中(zhong)用以傳輸和分配大功率電(dian)(dian)(dian)能的電(dian)(dian)(dian)纜產品，包括1-500KV以及(ji)以上各(ge)種電(dian)(dian)(dian)壓等(deng)級，各(ge)種絕緣的電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)纜。

    通過一(yi)定負載電(dian)(dian)流時，電(dian)(dian)力電(dian)(dian)纜一(yi)定會發(fa)熱，隨著負載電(dian)(dian)流的增大，電(dian)(dian)纜表面溫度就越高，如(ru)果(guo)不及(ji)時處(chu)理，后果(guo)可想而知。

如：聚氯(lv)乙(yi)烯(PVC)電纜，是(shi)以(yi)線(xian)芯(xin)溫(wen)度(du)70度(du)為上限考慮的，表(biao)面溫(wen)度(du)會(hui)低5～10度(du)。所(suo)以(yi)電纜表(biao)面溫(wen)度(du)在(zai)60度(du)以(yi)下基本是(shi)安全(quan)的，從電源維護考慮，當然是(shi)在(zai)高于(yu)環境溫(wen)度(du)的情況(kuang)下溫(wen)度(du)越低越好(hao)。

選擇廣州電力電纜應考慮以下(xia)十一個因素：

1、電(dian)纜的額定電(dian)壓要大于(yu)或等于(yu)安裝點供電(dian)系統(tong)的額定電(dian)壓；

2、電(dian)纜持(chi)續(xu)容許電(dian)流應等于(yu)或大于(yu)供電(dian)負(fu)載的較大持(chi)續(xu)電(dian)流；

3、線(xian)芯截面要(yao)滿足供電(dian)系(xi)統(tong)短路時的(de)穩定性的(de)要(yao)求(qiu)；

4、根據電纜(lan)長度驗算電壓降是否符合(he)要求(qiu)；

5、線路末端(duan)的(de)較小短(duan)路電(dian)流應能使保護裝置可靠的(de)動作(zuo)。

6、高的擊穿強度；

7、低的介質損耗；

8、相(xiang)當高的絕緣電阻；

9、優良的耐放電(dian)性能(neng)；

10、具有一定的柔軟性和機械強度；

11、絕緣(yuan)性能長期穩(wen)定。