電纜外護套檢測儀性能(neng)：地(di)埋電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)外(wai)(wai)護(hu)套(tao)故(gu)(gu)障(zhang)的(de)(de)(de)測(ce)(ce)(ce)(ce)尋，同電(dian)(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)故(gu)(gu)障(zhang)探測(ce)(ce)(ce)(ce)一樣，一般要經過“初(chu)(chu)測(ce)(ce)(ce)(ce)”和“定(ding)點”二個步驟，有時甚至還需要查找電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)路徑(jing)。外(wai)(wai)護(hu)套(tao)接地(di)故(gu)(gu)障(zhang)的(de)(de)(de)初(chu)(chu)測(ce)(ce)(ce)(ce)（測(ce)(ce)(ce)(ce)距）一般采用(yong)壓(ya)降法和電(dian)(dian)(dian)(dian)(dian)(dian)橋(qiao)法測(ce)(ce)(ce)(ce)試(shi)。由(you)于電(dian)(dian)(dian)(dian)(dian)(dian)橋(qiao)法測(ce)(ce)(ce)(ce)試(shi)有局限性，不(bu)能(neng)測(ce)(ce)(ce)(ce)試(shi)多點接地(di)故(gu)(gu)障(zhang)，也不(bu)能(neng)測(ce)(ce)(ce)(ce)試(shi)三相電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)鏈(lian)式接地(di)連線(xian)的(de)(de)(de)故(gu)(gu)障(zhang)。本(ben)儀器是針對外(wai)(wai)護(hu)套(tao)故(gu)(gu)障(zhang)的(de)(de)(de)特點，采用(yong)壓(ya)降法初(chu)(chu)測(ce)(ce)(ce)(ce)電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)外(wai)(wai)護(hu)套(tao)的(de)(de)(de)接地(di)故(gu)(gu)障(zhang)，再用(yong)跨步電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)法精確查找故(gu)(gu)障(zhang)點。儀器用(yong)于交聯電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)的(de)(de)(de)外(wai)(wai)護(hu)套(tao)故(gu)(gu)障(zhang)探測(ce)(ce)(ce)(ce)；也可用(yong)于地(di)埋線(xian)和全塑線(xian)（無金屬(shu)護(hu)層電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)）故(gu)(gu)障(zhang)的(de)(de)(de)探測(ce)(ce)(ce)(ce)；還可用(yong)作電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)外(wai)(wai)護(hu)套(tao)直流(liu)泄漏試(shi)驗。

電纜外護套檢測儀電壓(ya)調節及工作方式(shi)切換注意事項：

1、根據(ju)將要進行的測試類型選擇(ze)正確的工作方式。

進行(xing)泄(xie)漏(lou)測(ce)試將工作(zuo)方式撥到“泄(xie)漏(lou)測(ce)試”；

進行(xing)外護套故(gu)障距離初測將(jiang)工作方式撥(bo)到“DC1或(huo)DC2、DC3等”；

進(jin)行外護(hu)套故障(zhang)定點測試將工作方(fang)式(shi)撥(bo)到(dao)“AC1或AC2、AC3等”

2、工作方式切換(huan)時，先斷(duan)開電源30秒(miao)以上；

3、電壓(ya)調節(jie)可以(yi)控制輸出電壓(ya)和輸出電流(liu)(liu)的(de)(de)大(da)小幅度，當升高電壓(ya)時，在負載一定(ding)的(de)(de)情況(kuang)下，輸出的(de)(de)電流(liu)(liu)也會(hui)隨之增大(da)；

4、開機(ji)順序：

①按照(zhao)將要進行(xing)的試(shi)驗(yan)進行(xing)連(lian)線；

②選擇工(gong)作(zuo)方式(shi)；

③將電壓(ya)調節幅度旋鈕逆時針(zhen)旋到小；

④打開電源；

⑤逐步升(sheng)高(gao)試驗(yan)電壓。

三、主要技(ji)術參數

主  機  電(dian)    源：AC220V±10%  5A；

泄漏試驗(yan)輸出(chu)電壓(ya)：DC  0∽10KV負極性；

定點和(he)故障距離初測輸出電(dian)流：連續、斷續    0∽200mA 

體    積：340×320×260

重    量：10kg   

定點儀  靈(ling)敏度(du)：0.14V（未放(fang)大）

0.10mV（放大）

電  源：3×1.5V

重  量(liang)：0.5公斤