電纜外護套分析儀性(xing)(xing)能：地(di)(di)(di)埋(mai)電(dian)(dian)(dian)纜(lan)(lan)外(wai)(wai)護套故(gu)(gu)障(zhang)(zhang)的(de)(de)測(ce)尋，同電(dian)(dian)(dian)力電(dian)(dian)(dian)纜(lan)(lan)故(gu)(gu)障(zhang)(zhang)探測(ce)一樣，一般(ban)要(yao)經過“初(chu)測(ce)”和(he)“定點(dian)(dian)(dian)”二個步(bu)(bu)驟，有(you)時甚至還需要(yao)查找(zhao)電(dian)(dian)(dian)纜(lan)(lan)路徑。外(wai)(wai)護套接(jie)地(di)(di)(di)故(gu)(gu)障(zhang)(zhang)的(de)(de)初(chu)測(ce)（測(ce)距）一般(ban)采(cai)用(yong)(yong)(yong)(yong)壓(ya)降(jiang)法(fa)(fa)和(he)電(dian)(dian)(dian)橋法(fa)(fa)測(ce)試。由(you)于電(dian)(dian)(dian)橋法(fa)(fa)測(ce)試有(you)局限性(xing)(xing)，不能測(ce)試多點(dian)(dian)(dian)接(jie)地(di)(di)(di)故(gu)(gu)障(zhang)(zhang)，也不能測(ce)試三相電(dian)(dian)(dian)纜(lan)(lan)鏈式(shi)接(jie)地(di)(di)(di)連線的(de)(de)故(gu)(gu)障(zhang)(zhang)。本(ben)儀器是針(zhen)對外(wai)(wai)護套故(gu)(gu)障(zhang)(zhang)的(de)(de)特點(dian)(dian)(dian)，采(cai)用(yong)(yong)(yong)(yong)壓(ya)降(jiang)法(fa)(fa)初(chu)測(ce)電(dian)(dian)(dian)纜(lan)(lan)外(wai)(wai)護套的(de)(de)接(jie)地(di)(di)(di)故(gu)(gu)障(zhang)(zhang)，再用(yong)(yong)(yong)(yong)跨步(bu)(bu)電(dian)(dian)(dian)壓(ya)法(fa)(fa)精確查找(zhao)故(gu)(gu)障(zhang)(zhang)點(dian)(dian)(dian)。儀器用(yong)(yong)(yong)(yong)于交(jiao)聯電(dian)(dian)(dian)纜(lan)(lan)的(de)(de)外(wai)(wai)護套故(gu)(gu)障(zhang)(zhang)探測(ce)；也可(ke)用(yong)(yong)(yong)(yong)于地(di)(di)(di)埋(mai)線和(he)全(quan)塑線（無(wu)金屬護層(ceng)電(dian)(dian)(dian)纜(lan)(lan)）故(gu)(gu)障(zhang)(zhang)的(de)(de)探測(ce)；還可(ke)用(yong)(yong)(yong)(yong)作電(dian)(dian)(dian)纜(lan)(lan)外(wai)(wai)護套直流泄(xie)漏試驗(yan)。

電纜外護套分析儀電壓調(diao)節及工作(zuo)方式切換(huan)注意事項：

1、根據將要進行的(de)測試類型選擇正確的(de)工作方式。

進行泄漏測試將工作方式撥到“泄漏測試”；

進行外護(hu)套故障距離初測將工(gong)作方式撥到(dao)“DC1或DC2、DC3等”；

進(jin)行外護套故障定(ding)點測試將工(gong)作(zuo)方(fang)式撥到(dao)“AC1或AC2、AC3等(deng)”

2、工作(zuo)方式切(qie)換時(shi)，先斷(duan)開電源30秒(miao)以上；

3、電(dian)(dian)壓調(diao)節可以控(kong)制(zhi)輸出(chu)電(dian)(dian)壓和輸出(chu)電(dian)(dian)流(liu)的大小(xiao)幅度，當(dang)升高電(dian)(dian)壓時(shi)，在(zai)負載一定的情(qing)況下，輸出(chu)的電(dian)(dian)流(liu)也(ye)會隨之增大；

4、開機順序：

①按照將要進(jin)行(xing)的(de)試(shi)驗進(jin)行(xing)連線；

②選擇工作方式(shi)；

③將電(dian)壓調節幅度旋鈕逆時針旋到小；

④打開電源；

⑤逐步升高(gao)試驗(yan)電壓。

三、主要技術(shu)參(can)數

主  機  電(dian)    源：AC220V±10%  5A；

泄漏試驗輸出電壓：DC  0∽10KV負極性；

定點和故障距離初測輸出電流：連續、斷續    0∽200mA 

體(ti)    積(ji)：340×320×260

重    量(liang)：10kg   

定(ding)點儀  靈敏度：0.14V（未放大）

0.10mV（放大）

電(dian)  源：3×1.5V

重  量：0.5公斤(jin)