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138-9810-2027

西豐線纜需要做哪些檢測?

來源:行業動態(tai) 閱讀:115212 發(fa)布時間:2019-07-05

1.電性能檢測

主要有(you)導(dao)(dao)(dao)體(ti)(ti)直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)阻、絕(jue)緣(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)(dian)阻、成(cheng)(cheng)品電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)試(shi)驗及(ji)絕(jue)緣(yuan)(yuan)線芯(xin)間電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)試(shi)驗,每項都很(hen)重要,導(dao)(dao)(dao)體(ti)(ti)電(dian)(dian)(dian)(dian)(dian)(dian)阻直接反(fan)映了(le)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)傳輸性能,直接影(ying)響電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)在(zai)通(tong)電(dian)(dian)(dian)(dian)(dian)(dian)運行(xing)中的(de)(de)溫度(du)、壽命(ming)、電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)降(jiang)、以及(ji)運行(xing)安全,它主要考查導(dao)(dao)(dao)體(ti)(ti)的(de)(de)材質和(he)截(jie)面(mian)積,若(ruo)導(dao)(dao)(dao)體(ti)(ti)的(de)(de)材質不好或(huo)截(jie)面(mian)積嚴重不足,就會(hui)造(zao)(zao)成(cheng)(cheng)導(dao)(dao)(dao)體(ti)(ti)直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)阻嚴重超標(biao),這(zhe)種電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)鋪(pu)設在(zai)線路中就會(hui)增加電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)在(zai)線路上通(tong)過時的(de)(de)損耗(hao),引起電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)導(dao)(dao)(dao)體(ti)(ti)本身(shen)發(fa)熱,引起包覆導(dao)(dao)(dao)體(ti)(ti)的(de)(de)絕(jue)緣(yuan)(yuan)老化開裂,造(zao)(zao)成(cheng)(cheng)供電(dian)(dian)(dian)(dian)(dian)(dian)線路漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)、短路,甚(shen)至(zhi)造(zao)(zao)成(cheng)(cheng)火(huo)災,危(wei)及(ji)人身(shen)、財產的(de)(de)安全。標(biao)準對不同規(gui)格電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)的(de)(de)導(dao)(dao)(dao)體(ti)(ti)直流(liu)電(dian)(dian)(dian)(dian)(dian)(dian)阻值均有(you)嚴格的(de)(de)規(gui)定,不得(de)大于標(biao)準規(gui)定的(de)(de)值。

絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)電(dian)阻、成(cheng)品電(dian)壓(ya)試(shi)(shi)驗(yan)及絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)線芯間電(dian)壓(ya)試(shi)(shi)驗(yan),均(jun)考查的(de)是電(dian)纜絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)層和護(hu)套(tao)層的(de)電(dian)氣絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)性能(neng)(neng),絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)電(dian)阻是檢測兩(liang)個導體之間絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)材料(liao)的(de)電(dian)阻,它(ta)應足夠(gou)大以起到絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)保護(hu)作用。成(cheng)品電(dian)壓(ya)試(shi)(shi)驗(yan)及絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)線芯間電(dian)壓(ya)試(shi)(shi)驗(yan)不光要(yao)求(qiu)電(dian)纜有足夠(gou)的(de)絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)能(neng)(neng)力,還要(yao)求(qiu)絕(jue)(jue)(jue)(jue)(jue)(jue)緣(yuan)(yuan)或(huo)護(hu)套(tao)材料(liao)均(jun)勻無雜質、厚度(du)足夠(gou)均(jun)勻,表面不能(neng)(neng)有看不見的(de)沙眼、針孔(kong)等(deng),否則就會造成(cheng)耐(nai)壓(ya)試(shi)(shi)驗(yan)時局部擊穿。

2.機械性能檢測

主要是(shi)考查(cha)絕(jue)緣和(he)護套(tao)塑料(liao)(liao)材(cai)料(liao)(liao)的(de)抗(kang)張強度(du)(du)、斷裂伸(shen)長(chang)率,包(bao)括(kuo)老化前后,還有對于成(cheng)品軟電纜進行的(de)曲(qu)撓試驗(yan)、彎曲(qu)試驗(yan)、荷重斷芯(xin)試驗(yan)、絕(jue)緣線芯(xin)撕裂試驗(yan)、靜態曲(qu)撓試驗(yan)等。老化前、后抗(kang)張強度(du)(du)、老化前后斷裂伸(shen)長(chang)率是(shi)電纜絕(jue)緣和(he)護套(tao)材(cai)料(liao)(liao)最重要最基本的(de)指(zhi)標,要求用作電纜絕(jue)緣和(he)護套(tao)的(de)材(cai)料(liao)(liao),既要有足(zu)夠(gou)的(de)拉(la)伸(shen)強度(du)(du)不容易拉(la)斷,又要有一定的(de)柔韌性。

老化是指在高溫條件下,絕(jue)緣和(he)護(hu)套材(cai)料保持(chi)其(qi)原(yuan)有性能的(de)能力,老化不應嚴重影響(xiang)材(cai)料的(de)抗張強度和(he)伸(shen)長(chang)率,這些(xie)都(dou)將(jiang)直接(jie)影響(xiang)電纜的(de)使用壽命,若抗張強度和(he)斷裂(lie)伸(shen)長(chang)率不合格,進(jin)行電纜的(de)施工(gong)安(an)裝(zhuang)時(shi)就極(ji)易出現護(hu)套或絕(jue)緣體斷裂(lie),或在光(guang)、熱環境下使用的(de)電纜其(qi)護(hu)套和(he)絕(jue)緣容易變脆,斷裂(lie),致使帶電導體裸(luo)露,發生觸(chu)電危險。

另外軟電(dian)(dian)(dian)纜(lan)由于不(bu)是固定(ding)敷設,使(shi)用(yong)(yong)中存在(zai)(zai)反復拖拉、彎曲(qu)等情況,所以對(dui)于軟電(dian)(dian)(dian)纜(lan)標準又(you)另外規定(ding)了(le)在(zai)(zai)其成品電(dian)(dian)(dian)纜(lan)上加(jia)做動態(tai)(tai)曲(qu)撓(nao)試(shi)(shi)(shi)驗、彎曲(qu)試(shi)(shi)(shi)驗、荷(he)重(zhong)斷(duan)(duan)芯試(shi)(shi)(shi)驗、絕(jue)緣線(xian)(xian)芯撕裂試(shi)(shi)(shi)驗、靜(jing)態(tai)(tai)曲(qu)撓(nao)試(shi)(shi)(shi)驗等,以保證(zheng)這種線(xian)(xian)纜(lan)在(zai)(zai)實際使(shi)用(yong)(yong)中滿足要求。如(ru)動態(tai)(tai)曲(qu)撓(nao)試(shi)(shi)(shi)驗主要考(kao)核(he)軟電(dian)(dian)(dian)纜(lan)在(zai)(zai)受(shou)到(dao)外界(jie)的機械(xie)拉伸和彎曲(qu)等應力(li)時(shi),軟導體的絞(jiao)合線(xian)(xian)絲是否斷(duan)(duan)裂而(er)降低(di)電(dian)(dian)(dian)的傳輸性能,或(huo)者(zhe)刺破絕(jue)緣而(er)降低(di)絕(jue)緣電(dian)(dian)(dian)氣性能;絕(jue)緣在(zai)(zai)受(shou)到(dao)應力(li)作(zuo)用(yong)(yong)是是否變形或(huo)開裂而(er)影響電(dian)(dian)(dian)纜(lan)的電(dian)(dian)(dian)氣絕(jue)緣性能的一種試(shi)(shi)(shi)驗方(fang)法。

3.絕緣和(he)護套材料性能試驗(yan)

包括熱失重、熱沖擊、高(gao)溫(wen)(wen)壓(ya)力、低(di)溫(wen)(wen)彎曲、低(di)溫(wen)(wen)拉伸、低(di)溫(wen)(wen)沖擊、阻(zu)(zu)(zu)燃(ran)性(xing)(xing)(xing)能(neng)(neng)等等。這些都是(shi)考查(cha)絕緣和護套的(de)(de)塑料材(cai)料的(de)(de)性(xing)(xing)(xing)能(neng)(neng)好(hao)壞,如熱失重試(shi)驗(yan)(yan)(yan)是(shi)檢(jian)測(ce)經過(guo)7天80℃的(de)(de)高(gao)溫(wen)(wen)老化后材(cai)料降解、揮發的(de)(de)程度(du);熱沖擊檢(jian)測(ce)在150℃高(gao)溫(wen)(wen)1h后經特殊(shu)卷繞的(de)(de)絕緣表面是(shi)否有(you)開裂;高(gao)溫(wen)(wen)壓(ya)力檢(jian)測(ce)絕緣材(cai)料在經過(guo)高(gao)溫(wen)(wen)再冷卻后其彈(dan)性(xing)(xing)(xing)的(de)(de)保持程度(du);所有(you)的(de)(de)低(di)溫(wen)(wen)試(shi)驗(yan)(yan)(yan)一(yi)般指在-15℃條件下其機械性(xing)(xing)(xing)能(neng)(neng)的(de)(de)變化,都是(shi)檢(jian)測(ce)線纜(lan)材(cai)料在低(di)溫(wen)(wen)環境(jing)下是(shi)否變脆、易(yi)開裂或易(yi)拉斷等。 另(ling)外電纜(lan)的(de)(de)阻(zu)(zu)(zu)燃(ran)性(xing)(xing)(xing)能(neng)(neng)勝能(neng)(neng)很重要,考查(cha)該項性(xing)(xing)(xing)能(neng)(neng)的(de)(de)試(shi)驗(yan)(yan)(yan)為不延(yan)燃(ran)試(shi)驗(yan)(yan)(yan),即對按標準(zhun)安裝的(de)(de)成品電纜(lan)用專門(men)的(de)(de)火(huo)焰點燃(ran)一(yi)定的(de)(de)時(shi)間,待其火(huo)焰自行(xing)熄滅后檢(jian)查(cha)線纜(lan)被燒的(de)(de)情況,當然被燒掉的(de)(de)部分越少越好(hao),說明其燃(ran)燒性(xing)(xing)(xing)差,阻(zu)(zu)(zu)燃(ran)性(xing)(xing)(xing)好(hao),越安全。

4.標志檢查

標(biao)準(zhun)要求電(dian)纜(lan)包裝上應附有(you)表(biao)示產品型(xing)號(hao)(hao)、規(gui)格(ge)、標(biao)準(zhun)號(hao)(hao)、廠名和產地的標(biao)簽或(huo)標(biao)志,規(gui)格(ge)包括(kuo)額定(ding)電(dian)壓、芯數和導體標(biao)稱截面(mian)等(deng);電(dian)纜(lan)表(biao)面(mian)應印有(you)制造廠名、產品型(xing)號(hao)(hao)和額定(ding)電(dian)壓的連(lian)續(xu)標(biao)志,標(biao)志間距(ju)要求≤200mm(絕(jue)緣(yuan)表(biao)面(mian))或(huo)≤500mm (護套表(biao)面(mian)),標(biao)志內容應齊全、清晰(xi)、耐擦(ca),這個要求是方便使用者(zhe)了(le)解(jie)電(dian)纜(lan)的型(xing)號(hao)(hao)規(gui)格(ge)及電(dian)壓等(deng)級(ji),以防(fang)敷設錯誤。

另(ling)外,電線(xian)(xian)絕緣(yuan)線(xian)(xian)芯(xin)(xin)(xin)應(ying)優先選用標準推薦(jian)的顏(yan)色(se)(se),特別(bie)要提(ti)的是黃(huang)/綠雙(shuang)色(se)(se)線(xian)(xian)芯(xin)(xin)(xin),這(zhe)種(zhong)線(xian)(xian)一般用在電器產品(pin)的電源線(xian)(xian)中,這(zhe)條特殊雙(shuang)色(se)(se)線(xian)(xian)專(zhuan)用于(yu)接地,對(dui)于(yu)黃(huang)/綠搭配(pei)標準也有以下規定:即對(dui)每(mei)一段長(chang)巧~的雙(shuang)色(se)(se)絕緣(yuan)線(xian)(xian)芯(xin)(xin)(xin),其(qi)中一種(zhong)顏(yan)色(se)(se)應(ying)至少覆(fu)蓋絕緣(yuan)線(xian)(xian)芯(xin)(xin)(xin)表(biao)面的30%,且不大于(yu)70%,而另(ling)一種(zhong)顏(yan)色(se)(se)則覆(fu)蓋絕緣(yuan)線(xian)(xian)芯(xin)(xin)(xin)的其(qi)余部(bu)分,即黃(huang)/綠雙(shuang)色(se)(se)應(ying)基本均衡搭配(pei)。

5.結構尺寸檢測

包(bao)括絕緣(yuan)和護套的(de)(de)厚(hou)(hou)度(du)(du)、最薄(bo)厚(hou)(hou)度(du)(du)、外(wai)形尺(chi)寸(cun)等。絕緣(yuan)和護套的(de)(de)厚(hou)(hou)度(du)(du)大(da)小(xiao)對(dui)于電纜(lan)能(neng)夠(gou)耐受多大(da)強(qiang)度(du)(du)的(de)(de)電壓,以(yi)及其機械性能(neng)好(hao)壞都有(you)很重要(yao)的(de)(de)作(zuo)用,所以(yi)對(dui)于不(bu)(bu)同規(gui)格的(de)(de)電纜(lan),標(biao)準對(dui)厚(hou)(hou)度(du)(du)都有(you)嚴格規(gui)定,要(yao)求不(bu)(bu)得(de)低于國家標(biao)準的(de)(de)規(gui)定值。電纜(lan)絕緣(yuan)厚(hou)(hou)度(du)(du)太薄(bo)會(hui)嚴重影響電纜(lan)的(de)(de)使用安(an)(an)全,會(hui)帶來電纜(lan)擊(ji)穿、導體裸露引(yin)起漏電等安(an)(an)全隱患,當然(ran)也不(bu)(bu)是越厚(hou)(hou)越好(hao),應(ying)不(bu)(bu)影響安(an)(an)裝,故標(biao)準又設了一個(ge)外(wai)形尺(chi)寸(cun)要(yao)求對(dui)此進行(xing)限(xian)制(zhi)。

常見的認證標志

1.CCC認(ren)證(zheng)(zheng)強制(zhi)性認(ren)證(zheng)(zheng),是進入(ru)國內市場的通行(xing)證(zheng)(zheng)。

2.CB認證有利于產品出口(kou)(kou)用(yong)于家(jia)庭、辦公室、車間(jian)和(he)類(lei)似場(chang)(chang)所的(de)直接(jie)涉及人身(shen)(shen)安(an)全的(de)電工(gong)產品,這類(lei)產品在(zai)(zai)一部分國(guo)家(jia)中實行(xing)強(qiang)(qiang)制性(xing)認證,即取(qu)得(de)該(gai)國(guo)的(de)認證合格(ge)證書后,才允許出口(kou)(kou)到該(gai)國(guo),并在(zai)(zai)該(gai)國(guo)市場(chang)(chang)上(shang)銷售。即使在(zai)(zai)未實行(xing)強(qiang)(qiang)制性(xing)認證的(de)國(guo)家(jia)中,消費者為(wei)了自身(shen)(shen)的(de)安(an)全,都愿意購買(mai)經(jing)過認證而帶有認證標志(zhi)的(de)產品。

3.CE認證

是產品(pin)進入歐(ou)盟及歐(ou)洲貿易自由(you)區(qu)國家市場(chang)的(de)(de)通(tong)行證。獲得認證并(bing)貼(tie)有CE標志(zhi)的(de)(de)產品(pin)將降低在(zai)歐(ou)洲市場(chang)上銷售的(de)(de)風險:

1)被海關扣留和查處的風險;

2)被市(shi)場監督機(ji)構(gou)查處的風險;

3)同行出(chu)于競爭目的(de)的(de)指控風險。