電纜里面有水的危害

一般而言，電(dian)纜(lan)進水后，船用(yong)電(dian)纜(lan)，在電(dian)磁場的(de)作用(yong)下會發生“水樹(shu)老化”現(xian)象，電(dian)纜(lan)損壞只會是時間問(wen)題(ti)，zui終會導(dao)致電(dian)纜(lan)擊穿。

電纜里面有水的原因

1、電纜(lan)(lan)敷(fu)設保(bao)存時，重慶電纜(lan)(lan)，兩端電纜(lan)(lan)頭并沒有進行密封處理或者密封性不(bu)好(hao)，水汽滲入電纜(lan)(lan)內部。

2、電纜(lan)(lan)敷設過程(cheng)中，電纜(lan)(lan)頭密封(feng)不好(hao)且浸泡在(zai)水中，或者在(zai)穿(chuan)管敷設時，電纜(lan)(lan)外絕緣皮破1裂，船用電纜(lan)(lan)銷售，水滲入電纜(lan)(lan)。

3、電(dian)纜敷設完成后，兩(liang)端的電(dian)纜頭沒有及時制作，長期暴露(lu)在空氣中或者潮濕環境(jing)中。

4、電(dian)纜(lan)(lan)供電(dian)運行(xing)過程中發生過局部(bu)電(dian)纜(lan)(lan)擊穿，水滲入電(dian)纜(lan)(lan)。

首(shou)尾(wei)(wei)(wei)端(duan)預留(liu)的好(hao)處：電(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)纜接到饋線(xian)回路(lu)或設備時(shi)，需要(yao)(yao)(yao)壓接銅鼻子并(bing)且電(dian)(dian)(dian)(dian)纜的外保護層也(ye)需要(yao)(yao)(yao)撥開，一般在(zai)電(dian)(dian)(dian)(dian)纜的首(shou)尾(wei)(wei)(wei)端(duan)裸1露帶電(dian)(dian)(dian)(dian)部分比(bi)較容(rong)(rong)易出問題；而且配(pei)電(dian)(dian)(dian)(dian)柜(ju)、控制(zhi)柜(ju)等本(ben)身出問題時(shi)也(ye)比(bi)較容(rong)(rong)易波及電(dian)(dian)(dian)(dian)纜，所以(yi)在(zai)電(dian)(dian)(dian)(dian)纜首(shou)尾(wei)(wei)(wei)端(duan)都需要(yao)(yao)(yao)預留(liu)一定長度(du)，來應對后續維修。

檢修井預留的好處：電力電暗敷時需要在一定距離設置一個檢修井，主要用來應對電纜中間段故障的檢查和檢修。如果某段受外力破壞或者出問題時，檢修井里面預留的量可以就近利用，使維修方便省時。

常用的電纜(lan)分類分為(wei)五大類：

(1) 電線(xian)與裸內(nei)導體制品：指僅(jin)有(you)導體，而無絕緣層和其它結(jie)構。如：銅、鋁(lv)及各(ge)(ge)種(zhong)復合金屬單(dan)線(xian);各(ge)(ge)種(zhong)結(jie)構的架空傳輸用絞線(xian)、軟接線(xian)、型(xing)線(xian)和型(xing)材等等。

(2) 電磁(ci)(ci)線(xian)：以(yi)繞組的(de)形(xing)式在磁(ci)(ci)場中切割磁(ci)(ci)力(li)線(xian)感應產生(sheng)電流，光(guang)伏電纜銷(xiao)售，或通過以(yi)電流1產生(sheng)磁(ci)(ci)場作(zuo)用的(de)電線(xian)稱為電磁(ci)(ci)線(xian)。如(ru)漆包線(xian)、纖(xian)維繞包線(xian)、無機絕緣線(xian)等等。

(3) 電力(li)電纜(lan)：在電力(li)系統(tong)的主干線路中用以(yi)傳輸和分(fen)配大(da)功率電能的電線產品，稱為電力(li)電纜(lan)。如：各(ge)種電壓等級的塑力(li)纜(lan)、油浸(jin)紙電纜(lan)和不滴(di)流等等。

(4) 通(tong)信(xin)電(dian)(dian)纜：傳輸音(yin)頻(pin)和(he)音(yin)頻(pin)以上各種電(dian)(dian)訊信(xin)息(xi)用的電(dian)(dian)纜。如(ru)：市話(hua)電(dian)(dian)纜、長途對稱通(tong)信(xin)電(dian)(dian)纜、同(tong)軸通(tong)信(xin)電(dian)(dian)纜、電(dian)(dian)話(hua)設備用電(dian)(dian)纜和(he)數(shu)據(ju)電(dian)(dian)纜等等。

(5) 電(dian)(dian)氣裝(zhuang)(zhuang)備(bei)用(yong)電(dian)(dian)線電(dian)(dian)纜：從(cong)電(dian)(dian)力系統的(de)配電(dian)(dian)點把(ba)電(dian)(dian)能(neng)直接傳送(song)到各種(zhong)(zhong)用(yong)電(dian)(dian)設備(bei)、器具的(de)電(dian)(dian)源連接用(yong)電(dian)(dian)線電(dian)(dian)纜。如(ru)：各種(zhong)(zhong)工農業裝(zhuang)(zhuang)備(bei)中(zhong)的(de)電(dian)(dian)氣連接和控制(zhi)信號用(yong)的(de)電(dian)(dian)線電(dian)(dian)纜。這類產品使(shi)用(yong)面廣、品種(zhong)(zhong)繁(fan)多，而且(qie)大多要結合所(suo)用(yong)裝(zhuang)(zhuang)備(bei)的(de)特征和使(shi)用(yong)的(de)環境條(tiao)件來確定(ding)產品的(de)結構(gou)、性(xing)能(neng)。