YZ-2012交聯(lian)電纜外護套故(gu)障(zhang)測試儀 

YZ-2012電(dian)(dian)(dian)(dian)纜(lan)(lan)外(wai)護(hu)(hu)套(tao)故(gu)障定(ding)(ding)位系(xi)統主要用(yong)于精確定(ding)(ding)點單(dan)(dan)芯(xin)電(dian)(dian)(dian)(dian)纜(lan)(lan)的(de)外(wai)護(hu)(hu)套(tao)故(gu)障，精確定(ding)(ding)點低(di)壓(ya)電(dian)(dian)(dian)(dian)纜(lan)(lan)中的(de)接地(di)(di)泄漏故(gu)障，進行高(gao)(gao)壓(ya)電(dian)(dian)(dian)(dian)纜(lan)(lan)外(wai)護(hu)(hu)套(tao)故(gu)障的(de)預定(ding)(ding)位。也可(ke)以用(yong)來交聯電(dian)(dian)(dian)(dian)纜(lan)(lan)外(wai)護(hu)(hu)套(tao)的(de)耐壓(ya)試(shi)驗（10KV/1min），快速(su)準確查找(zhao)10kv-500kv單(dan)(dan)芯(xin)和(he)三(san)芯(xin)高(gao)(gao)壓(ya)、超(chao)高(gao)(gao)壓(ya)電(dian)(dian)(dian)(dian)纜(lan)(lan)外(wai)護(hu)(hu)套(tao)接地(di)(di)故(gu)障和(he)泄漏電(dian)(dian)(dian)(dian)流偏(pian)大(da)等隱患，同時可(ke)對高(gao)(gao)密度聚(ju)乙烯、聚(ju)氯乙烯電(dian)(dian)(dian)(dian)纜(lan)(lan)外(wai)護(hu)(hu)套(tao)進行5kv-10kv,1分鐘的(de)直流耐壓(ya)實驗，是10kv-500kv單(dan)(dan)芯(xin)和(he)三(san)芯(xin)高(gao)(gao)壓(ya)、超(chao)高(gao)(gao)壓(ya)電(dian)(dian)(dian)(dian)纜(lan)(lan)運行單(dan)(dan)位、超(chao)高(gao)(gao)壓(ya)電(dian)(dian)(dian)(dian)纜(lan)(lan)工程公(gong)司、各送變(bian)電(dian)(dian)(dian)(dian)工程公(gong)司的(de)電(dian)(dian)(dian)(dian)纜(lan)(lan)設備維護(hu)(hu)*的(de)儀器。

測試原理
   地(di)埋電(dian)(dian)纜(lan)外(wai)護套故(gu)(gu)障的(de)(de)測(ce)(ce)(ce)尋，同電(dian)(dian)力電(dian)(dian)纜(lan)故(gu)(gu)障探測(ce)(ce)(ce)一樣，一般(ban)要經過(guo)(guo)“測(ce)(ce)(ce)距”和“定點(dian)(dian)(dian)(dian)”二個步驟。外(wai)護套接(jie)(jie)(jie)地(di)故(gu)(gu)障的(de)(de)初測(ce)(ce)(ce)（測(ce)(ce)(ce)距）一般(ban)采用(yong)壓降法和電(dian)(dian)橋(qiao)(qiao)法測(ce)(ce)(ce)試(shi)(shi)，電(dian)(dian)橋(qiao)(qiao)法測(ce)(ce)(ce)試(shi)(shi)準確(que)，使(shi)用(yong)方便，但(dan)由于電(dian)(dian)橋(qiao)(qiao)法不能測(ce)(ce)(ce)試(shi)(shi)多(duo)點(dian)(dian)(dian)(dian)接(jie)(jie)(jie)地(di)故(gu)(gu)障，也不能測(ce)(ce)(ce)試(shi)(shi)三(san)相電(dian)(dian)纜(lan)鏈式接(jie)(jie)(jie)地(di)連線的(de)(de)故(gu)(gu)障。而壓降法卻可彌補上(shang)述問題。外(wai)護套接(jie)(jie)(jie)地(di)故(gu)(gu)障的(de)(de)精確(que)定點(dian)(dian)(dian)(dian)則采用(yong)跨(kua)(kua)步電(dian)(dian)壓法，通過(guo)(guo)兩根接(jie)(jie)(jie)地(di)鐵釬，尋找(zhao)土壤中電(dian)(dian)勢zui低點(dian)(dian)(dian)(dian)而精確(que)定點(dian)(dian)(dian)(dian)。在故(gu)(gu)障點(dian)(dian)(dian)(dian)處(chu)流(liu)入大(da)地(di)的(de)(de)測(ce)(ce)(ce)試(shi)(shi)電(dian)(dian)流(liu)導致故(gu)(gu)障點(dian)(dian)(dian)(dian)處(chu)為(wei)正負電(dian)(dian)壓峰值轉(zhuan)換點(dian)(dian)(dian)(dian)，在故(gu)(gu)障點(dian)(dian)(dian)(dian)前接(jie)(jie)(jie)近故(gu)(gu)障時(shi)，跨(kua)(kua)步電(dian)(dian)壓增(zeng)加，越(yue)過(guo)(guo)故(gu)(gu)障后(hou)跨(kua)(kua)步電(dian)(dian)壓減小，并且極性(xing)改變(bian)。在接(jie)(jie)(jie)地(di)故(gu)(gu)障點(dian)(dian)(dian)(dian)正上(shang)方時(shi)，指針(zhen)停在零位，此處(chu)既為(wei)電(dian)(dian)纜(lan)故(gu)(gu)障點(dian)(dian)(dian)(dian)的(de)(de)準確(que)位置。

用途

n 用于(yu)查找(zhao)敷(fu)設后的高壓(ya)電(dian)纜護層缺(que)陷點

引起(qi)電(dian)纜護(hu)層(ceng)缺陷(xian)的原因大(da)致有：運行過程(cheng)中被白蟻或其它原因所(suo)傷；敷(fu)設(she)過程(cheng)中劃傷塑料外護(hu)套；護(hu)套上(shang)固(gu)有的沙(sha)眼或裂紋(wen)，在工廠內能通過試驗，敷(fu)設(she)后受潮引起(qi)絕(jue)緣(yuan)電(dian)阻偏低；接地(di)箱，接地(di)線絕(jue)緣(yuan)不良等。

n  用(yong)于護層直流(liu)耐(nai)壓試驗

PVC護層的長(chang)電(dian)纜線路，高溫(wen)天氣下(xia)進行10kV耐壓試驗時，電(dian)流可(ke)能高達30mA。設備輕便易用(yong)，輸出電(dian)流大，能方便地用(yong)于這(zhe)類護層耐壓試驗。

技術指標

1、護(hu)層故障定(ding)位電源

n  電(dian)源輸出方式(shi)：        直流、脈動兩種方式(shi)可選(xuan)

n  直流輸出(chu)電壓：        0～15kV連(lian)續可調

n  直流輸出電流：        短路(lu)電流兩(liang)檔(dang)可調(diao)，連(lian)續(xu)方(fang)式下20～100mA，脈沖方(fang)式下200～1000mA

n  zui大輸出(chu)功(gong)率：        600W

2、高壓(ya)定位(wei)電橋

n  輸(shu)出電壓：        5kV/15kV兩檔可(ke)選

n  短路電流：        30mA

n  燒穿功率：        300W

n  定(ding)位精度(du)：        ±（0.2%·L±1）m

n  測量范圍(wei)：       0～200km（無盲區，不(bu)受(shou)距離限制）

n  抗(kang)干擾能(neng)力(li)：     周圍有強電場干擾下，能(neng)正常(chang)工作

3、跨(kua)步電壓指示(shi)器(qi)

n  測量靈敏度：        6檔(dang)可選，0.10V（未放大）；0.30mV（放大）

標準配置

n  GZD-400A電纜故(gu)障定(ding)位電橋(qiao)

體積：    38cm×36cm×27cm，           重量：       10kg

n  YZ-2012電纜護層故(gu)障定位電源(yuan)

體積：   42cm×26cm×40cm              重量：       13kg

n  YZ-2012跨步電壓指示器

測量靈敏度(du)：0.10V（未(wei)放(fang)大），0.30mV（放(fang)大）

體積：   21cm×10cm×10cm              重量(liang)：       1kg