99久久久国产精品免费无码专区_一级毛片AAAAAA国产精品_精品亚洲AV无码一区二区蜜桃_亚洲五月综合缴情综合久久_亚洲国产欧美目韩成人综合

   電(dian)纜(lan)線(xian)路兩末端的(de)(de)接(jie)(jie)頭(tou)(tou)稱為(wei)(wei)電(dian)纜(lan)終端頭(tou)(tou)，中間(jian)的(de)(de)接(jie)(jie)頭(tou)(tou)稱為(wei)(wei)中間(jian)接(jie)(jie)頭(tou)(tou)，終端頭(tou)(tou)和中間(jian)接(jie)(jie)頭(tou)(tou)又統稱為(wei)(wei)電(dian)纜(lan)頭(tou)(tou)。電(dian)纜(lan)頭(tou)(tou)一般(ban)是在電(dian)纜(lan)敷設就位后在現場進(jin)行制作。它的(de)(de)主(zhu)要作用是使(shi)電(dian)纜(lan)保持密封，使(shi)線(xian)路暢通，電(dian)纜(lan)接(jie)(jie)頭(tou)(tou)處的(de)(de)絕緣等級，使(shi)其能夠(gou)安全的(de)(de)運行。電(dian)纜(lan)頭(tou)(tou)制作的(de)(de)方法很多，但目前大多使(shi)用的(de)(de)是熱(re)縮式和冷縮式兩種方法。

   冷縮式(shi)(shi)電(dian)(dian)(dian)纜(lan)(lan)(lan)頭與熱縮式(shi)(shi)電(dian)(dian)(dian)纜(lan)(lan)(lan)頭比較，具(ju)有(you)制作(zuo)簡便；受人為影(ying)響因素小(xiao)，冷縮電(dian)(dian)(dian)纜(lan)(lan)(lan)附件會隨著(zhu)電(dian)(dian)(dian)纜(lan)(lan)(lan)的熱脹冷縮而和電(dian)(dian)(dian)纜(lan)(lan)(lan)保持同步呼吸作(zuo)用，使電(dian)(dian)(dian)纜(lan)(lan)(lan)和附件始終保持良(liang)好(hao)的結合狀態等優(you)點(dian)，但成(cheng)本高。而熱縮式(shi)(shi)電(dian)(dian)(dian)纜(lan)(lan)(lan)頭與冷縮式(shi)(shi)電(dian)(dian)(dian)纜(lan)(lan)(lan)頭相比主要優(you)點(dian)只是成(cheng)本低(di)，所以，目(mu)前(qian)在10KV以上領域，廣泛使用冷縮式(shi)(shi)電(dian)(dian)(dian)纜(lan)(lan)(lan)頭。