UL1275-UL10721-UL10880

電(dian)力電(dian)纜(lan)在(zai)施工(gong)中，有(you)采用(yong)鋼(gang)支架的，有(you)采用(yong)鋼(gang)質保護管的，有(you)采用(yong)電(dian)纜(lan)卡與架空敷設的，凡是在(zai)電(dian)力電(dian)纜(lan)周(zhou)圍(wei)形成(cheng)(cheng)鋼(gang)（鐵(tie)）性(xing)閉合回(hui)路(lu)的，均(jun)有(you)可(ke)能形成(cheng)(cheng)渦流(liu)，特別是在(zai)大電(dian)流(liu)電(dian)力電(dian)纜(lan)系統中，渦流(liu)更大。在(zai)電(dian)力電(dian)纜(lan)施工(gong)時，***采取措(cuo)施，使電(dian)纜(lan)周(zhou)圍(wei)不能形成(cheng)(cheng)鋼(gang)（鐵(tie)）性(xing)閉合回(hui)路(lu)，防止電(dian)纜(lan)引起渦流(liu)現象發生。

電(dian)(dian)(dian)(dian)力(li)(li)電(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)(de)轉(zhuan)彎(wan)(wan)引起(qi)的(de)(de)機械(xie)性(xing)損傷問題由(you)于電(dian)(dian)(dian)(dian)力(li)(li)電(dian)(dian)(dian)(dian)纜(lan)(lan)外徑較大，運輸、敷設較為(wei)困難，電(dian)(dian)(dian)(dian)力(li)(li)電(dian)(dian)(dian)(dian)纜(lan)(lan)對轉(zhuan)彎(wan)(wan)半徑的(de)(de)要(yao)求(qiu)也比較嚴格。電(dian)(dian)(dian)(dian)力(li)(li)電(dian)(dian)(dian)(dian)纜(lan)(lan)在施工中(zhong)(zhong)，如(ru)果轉(zhuan)彎(wan)(wan)角度(du)過大，可能使導體(ti)內(nei)部受(shou)到機械(xie)損傷，而機械(xie)損傷因被電(dian)(dian)(dian)(dian)纜(lan)(lan)絕(jue)緣強度(du)下降(jiang)，直到出現故(gu)障(zhang)，施工中(zhong)(zhong)發(fa)現一次電(dian)(dian)(dian)(dian)纜(lan)(lan)頭(tou)故(gu)障(zhang)，在電(dian)(dian)(dian)(dian)纜(lan)(lan)頭(tou)制作時(shi)，三根(gen)電(dian)(dian)(dian)(dian)纜(lan)(lan)頭(tou)長(chang)(chang)度(du)一致，與設備(bei)(bei)連(lian)(lian)接(jie)時(shi)由(you)于受(shou)地形限(xian)制，中(zhong)(zhong)相電(dian)(dian)(dian)(dian)纜(lan)(lan)頭(tou)偏長(chang)(chang)而成為(wei)拱形，電(dian)(dian)(dian)(dian)纜(lan)(lan)頭(tou)根(gen)部受(shou)損放電(dian)(dian)(dian)(dian)。后采(cai)取措施，在設備(bei)(bei)的(de)(de)連(lian)(lian)接(jie)，適當縮(suo)短中(zhong)(zhong)相電(dian)(dian)(dian)(dian)纜(lan)(lan)頭(tou)連(lian)(lian)接(jie)長(chang)(chang)度(du)，使三相電(dian)(dian)(dian)(dian)纜(lan)(lan)頭(tou)均不受(shou)外力(li)(li)，實踐證明(ming)運行效果良好。由(you)此可見，電(dian)(dian)(dian)(dian)纜(lan)(lan)施工過程中(zhong)(zhong)，要(yao)盡可能減少電(dian)(dian)(dian)(dian)纜(lan)(lan)受(shou)到的(de)(de)扭(niu)力(li)(li)，在電(dian)(dian)(dian)(dian)纜(lan)(lan)轉(zhuan)彎(wan)(wan)和裕留電(dian)(dian)(dian)(dian)纜(lan)(lan)時(shi)，讓電(dian)(dian)(dian)(dian)纜(lan)(lan)處于自然(ran)彎(wan)(wan)曲，內(nei)部機械(xie)損傷現象。

電(dian)(dian)(dian)(dian)力纜(lan)(lan)(lan)防潮問(wen)題(ti)運行(xing)經驗表明，中(zhong)(zhong)、低(di)(di)壓(ya)電(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)故障大(da)部分為(wei)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)中(zhong)(zhong)間接頭(tou)和終(zhong)端頭(tou)故障，而中(zhong)(zhong)間接頭(tou)和終(zhong)端頭(tou)故障則大(da)部分是因(yin)(yin)密(mi)封不(bu)(bu)良，潮氣(qi)侵入(ru)而造(zao)成(cheng)絕緣強度下(xia)降，而中(zhong)(zhong)、低(di)(di)壓(ya)電(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)網(wang)多(duo)采用樹枝(zhi)狀供電(dian)(dian)(dian)(dian)方式，電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)終(zhong)端頭(tou)數量較多(duo)，因(yin)(yin)此(ci)把(ba)好電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)終(zhong)端頭(tou)和中(zhong)(zhong)間接頭(tou)堵漏密(mi)封關是保證電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)安全可靠(kao)運行(xing)的(de)重要(yao)措(cuo)施(shi)之(zhi)一。在公用中(zhong)(zhong)、低(di)(di)壓(ya)電(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)網(wang)上，由于三相負荷不(bu)(bu)是相等的(de)，因(yin)(yin)此(ci)，如(ru)果采用有金屬(shu)護層(ceng)(ceng)的(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)，***考慮金屬(shu)護層(ceng)(ceng)的(de)接地問(wen)題(ti)，并保證在金屬(shu)護層(ceng)(ceng)的(de)任(ren)一點非接地處的(de)正(zheng)常感應電(dian)(dian)(dian)(dian)壓(ya)不(bu)(bu)得大(da)于100V。我認為(wei)，在中(zhong)(zhong)、低(di)(di)壓(ya)電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)網(wang)中(zhong)(zhong)，所有電(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)接頭(tou)處均應設(she)置接地極(ji)（網(wang)），并使金屬(shu)護層(ceng)(ceng)可靠(kao)接地。

UL1275-UL10721-UL10880。

隨著社會(hui)的(de)(de)(de)不斷發(fa)展(zhan)，對電(dian)線(xian)電(dian)纜(lan)的(de)(de)(de)要求也(ye)日益提高著，電(dian)線(xian)電(dian)纜(lan)的(de)(de)(de)分類也(ye)就(jiu)越加的(de)(de)(de)詳(xiang)細(xi)，比如耐(nai)火、阻燃、無鹵(lu)電(dian)子線(xian)電(dian)纜(lan)也(ye)就(jiu)出現在了我們的(de)(de)(de)日常生活中，那么對于(yu)這些(xie)電(dian)線(xian)電(dian)纜(lan)又該如何的(de)(de)(de)辨別呢？下面(mian)給咱說(shuo)一下關于(yu)低煙(yan)無鹵(lu)的(de)(de)(de)電(dian)線(xian)電(dian)纜(lan)的(de)(de)(de)識別方(fang)法.

其可以通過以下的幾個方面加以辨別:

1、無鹵電子線(xian)的(de)識別(bie)方法(fa)(fa)之表皮燒(shao)燙法(fa)(fa)。用(yong)電烙鐵燙一(yi)下絕(jue)緣(yuan)層(ceng)(ceng)應該會沒(mei)有(you)明顯凹陷(xian)，如(ru)(ru)果出現有(you)較(jiao)(jiao)大凹陷(xian)那(nei)就說(shuo)(shuo)明絕(jue)緣(yuan)層(ceng)(ceng)使(shi)(shi)用(yong)的(de)材料(liao)或者工藝存(cun)在缺陷(xian)。或者可以用(yong)打火機燒(shao)烤，正常情況下都是(shi)不易點燃(ran)，長時間燃(ran)燒(shao)后電纜的(de)絕(jue)緣(yuan)層(ceng)(ceng)還是(shi)比較(jiao)(jiao)完整，沒(mei)有(you)濃煙(yan)與刺激性氣味(wei)，同時直徑有(you)所(suo)增(zeng)加(jia)。如(ru)(ru)很容易點燃(ran)，則可以確(que)定電纜的(de)絕(jue)緣(yuan)層(ceng)(ceng)沒(mei)有(you)使(shi)(shi)用(yong)低煙(yan)無鹵材料(liao)(很可能是(shi)聚(ju)乙烯(xi)(xi)或者交(jiao)聯聚(ju)乙烯(xi)(xi)材料(liao))。如(ru)(ru)果出現比較(jiao)(jiao)霧，則說(shuo)(shuo)明絕(jue)緣(yuan)層(ceng)(ceng)使(shi)(shi)用(yong)的(de)是(shi)含(han)鹵材料(liao)。如(ru)(ru)果長時間燃(ran)燒(shao)后，絕(jue)緣(yuan)表面脫落嚴重，直徑沒(mei)有(you)明顯的(de)增(zeng)加(jia)，則說(shuo)(shuo)明沒(mei)有(you)進行合適的(de)輻(fu)照交(jiao)聯工藝處(chu)理(li)。

2、無鹵電子線(xian)的(de)(de)識別方(fang)法之熱水(shui)浸(jin)泡(pao)法。把(ba)線(xian)芯或者(zhe)電纜放在(zai)90℃的(de)(de)熱水(shui)中浸(jin)泡(pao)，正常情況下絕緣(yuan)電阻不會急(ji)速下降(jiang)并(bing)保持在(zai)0.1MΩ/Km以上。如絕緣(yuan)電阻急(ji)速下降(jiang)甚(shen)至低于(yu)0.009MΩ/Km，則說(shuo)明沒(mei)有經過合適的(de)(de)輻照交聯工藝處理。

3、低(di)煙(yan)無(wu)鹵電子(zi)線的(de)(de)識別方(fang)法之密度對比法。低(di)煙(yan)無(wu)鹵材料的(de)(de)密度比水(shui)大，可以剝(bo)下少許(xu)絕緣(yuan)層放入水(shui)中，如(ru)果浮在水(shui)面上方(fang)的(de)(de)，則肯定不(bu)是(shi)低(di)煙(yan)無(wu)鹵無(wu)鹵電子(zi)線。

以上(shang)是(shi)UL10721，UL1275，UL10880，UL電(dian)子線的相關(guan)信息，歡迎致電(dian)聯系(xi)咨詢