帶電電纜識別儀是(shi)用于將某一(yi)特定電纜從一(yi)束電纜中識(shi)別(bie)出(chu)來(lai)的儀器(qi)。它是(shi)一(yi)小型化手提式，緊湊(cou)型儀器(qi)，裝(zhuang)在鋁(lv)合金箱(xiang)內，由一(yi)個(ge)信號發生器(qi)，一(yi)個(ge)帶(dai)傳感器(qi)的接收機(ji)及(ji)連線構成。

帶電電纜識別儀簡介：為(wei)了可靠準(zhun)確(que)地識(shi)別(bie)電(dian)纜(lan)(lan)，需(xu)要(yao)給被(bei)識(shi)別(bie)電(dian)纜(lan)(lan)加(jia)一特殊的信(xin)號(hao)，該信(xin)號(hao)要(yao)被(bei)接收機接收，利用這一特性便能(neng)識(shi)別(bie)出(chu)要(yao)找(zhao)的電(dian)纜(lan)(lan)。

工作原理：

發生器將周期(qi)性的(de)(de)單(dan)極性電(dian)(dian)(dian)(dian)壓脈(mo)沖饋(kui)(kui)入(ru)要識別(bie)的(de)(de)電(dian)(dian)(dian)(dian)纜(lan)中，該(gai)電(dian)(dian)(dian)(dian)纜(lan)需要在遠端接地，以保證(zheng)有足夠大的(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)流(liu)(liu)(liu)過電(dian)(dian)(dian)(dian)纜(lan)。該(gai)系(xi)統(tong)要設(she)計成返(fan)回電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)不要從同一(yi)(yi)電(dian)(dian)(dian)(dian)纜(lan)中返(fan)回，能(neng)做到這一(yi)(yi)點，饋(kui)(kui)入(ru)電(dian)(dian)(dian)(dian)纜(lan)中的(de)(de)脈(mo)沖電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)的(de)(de)方(fang)向(xiang)可做為一(yi)(yi)明顯的(de)(de)識別(bie)標準，流(liu)(liu)(liu)出(chu)(chu)去(qu)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)僅從這一(yi)(yi)根電(dian)(dian)(dian)(dian)纜(lan)通(tong)過，所(suo)有其它鄰近電(dian)(dian)(dian)(dian)纜(lan)中流(liu)(liu)(liu)過的(de)(de)都是返(fan)回電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)，但它們的(de)(de)極性相反。除了電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)方(fang)向(xiang)這一(yi)(yi)實際差異外，電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)幅度也是一(yi)(yi)識別(bie)特征，流(liu)(liu)(liu)出(chu)(chu)去(qu)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)僅通(tong)過一(yi)(yi)根電(dian)(dian)(dian)(dian)纜(lan)、而返(fan)回電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)可通(tong)過幾根電(dian)(dian)(dian)(dian)纜(lan)、這意(yi)味著流(liu)(liu)(liu)出(chu)(chu)去(qu)的(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)比流(liu)(liu)(liu)過其它電(dian)(dian)(dian)(dian)纜(lan)的(de)(de)返(fan)回電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)大。

　　接收機(ji)的(de)任務是探測(ce)流(liu)過(guo)電(dian)(dian)(dian)(dian)纜(lan)電(dian)(dian)(dian)(dian)流(liu)方(fang)(fang)向(xiang)(xiang)以及它的(de)大(da)小。為達到這(zhe)一目的(de)，電(dian)(dian)(dian)(dian)流(liu)傳(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)被(bei)用作傳(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)，它帶有(you)一放大(da)器(qi)并串聯在(zai)電(dian)(dian)(dian)(dian)路(lu)中，傳(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)鉗住被(bei)測(ce)電(dian)(dian)(dian)(dian)纜(lan)，電(dian)(dian)(dian)(dian)流(liu)流(liu)過(guo)電(dian)(dian)(dian)(dian)纜(lan)產(chan)生(sheng)的(de)磁場在(zai)傳(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)的(de)線圈(quan)(quan)中感(gan)(gan)(gan)(gan)應出電(dian)(dian)(dian)(dian)壓，該電(dian)(dian)(dian)(dian)壓極性由電(dian)(dian)(dian)(dian)流(liu)方(fang)(fang)向(xiang)(xiang)和傳(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)線圈(quan)(quan)的(de)方(fang)(fang)向(xiang)(xiang)決定。為了(le)得(de)到明顯有(you)電(dian)(dian)(dian)(dian)流(liu)方(fang)(fang)向(xiang)(xiang)的(de)電(dian)(dian)(dian)(dian)壓極性，對(dui)一束電(dian)(dian)(dian)(dian)纜(lan)中所(suo)有(you)電(dian)(dian)(dian)(dian)纜(lan)進行測(ce)試都采取相同正確的(de)方(fang)(fang)向(xiang)(xiang)。傳(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)線圈(quan)(quan)中感(gan)(gan)(gan)(gan)應的(de)電(dian)(dian)(dian)(dian)壓在(zai)表頭中顯示出來，如果(guo)傳(chuan)(chuan)感(gan)(gan)(gan)(gan)器(qi)按上述方(fang)(fang)式(shi)連接，指針擺動(dong)方(fang)(fang)向(xiang)(xiang)可顯示電(dian)(dian)(dian)(dian)流(liu)方(fang)(fang)向(xiang)(xiang)，即只有(you)電(dian)(dian)(dian)(dian)流(liu)流(liu)出的(de)這(zhe)根電(dian)(dian)(dian)(dian)纜(lan)指針向(xiang)(xiang)一邊偏，這(zhe)根就是要找(zhao)的(de)電(dian)(dian)(dian)(dian)纜(lan)。所(suo)有(you)其它電(dian)(dian)(dian)(dian)纜(lan)只流(liu)過(guo)返回電(dian)(dian)(dian)(dian)流(liu)，指針向(xiang)(xiang)另一邊偏、或無脈動(dong)電(dian)(dian)(dian)(dian)流(liu)，指針不(bu)偏轉。接收機(ji)上的(de)放大(da)調節器(qi)可調整信(xin)號強度(du)。

二、功能介紹

識(shi)別儀主機各(ge)部分功(gong)能如下：

1.　電(dian)(dian)源(yuan)開關：控(kong)制整機電(dian)(dian)源(yuan)通(tong)斷(duan)。

2.　電源(yuan)輸(shu)入插(cha)座：用(yong)(yong)儀(yi)器所(suo)配(pei)電源(yuan)線，輸(shu)入50HZ、220V交流(liu)電源(yuan)。儀(yi)器使用(yong)(yong)時，應獨立使用(yong)(yong)三孔(kong)電源(yuan)插(cha)座，插(cha)座接地(di)線就近直(zhi)接接地(di)。

3.　保險(xian)(xian)座：儀器使用10A保險(xian)(xian)芯，損(sun)壞時應換同規格(ge)保險(xian)(xian)芯。

4.　黑接線(xian)柱：測試時(shi)，用配套黑色測試線(xian)（Ф4插(cha)頭）插(cha)入此(ci)插(cha)孔，另一端測試夾接系統地(di)。

5.　紅接(jie)線(xian)柱：測(ce)(ce)試(shi)時，用(yong)配(pei)套紅色(se)測(ce)(ce)試(shi)線(xian)（Ф4插頭）插入此插孔，另一(yi)端(duan)測(ce)(ce)試(shi)夾接(jie)被測(ce)(ce)電(dian)纜(lan)芯(xin)線(xian)。

6.　表頭(tou)：指示輸(shu)出電(dian)流大(da)小。7.輸(shu)出調節(jie)(jie)；調節(jie)(jie)輸(shu)出電(dian)流大(da)小。

7、輸(shu)出調節(jie)(jie)旋鈕：用(yong)于輸(shu)出幅(fu)度(du)大小的調節(jie)(jie)。以(yi)不滿刻度(du)打表為原則(ze)。

接收機(ji)各部分功能(neng)如下(xia)：

1. 靈敏度調節：順時針旋(xuan)轉，接收機電表(biao)指(zhi)示值增大，逆時針旋(xuan)轉，指(zhi)示值變小。

2. 表頭：指示(shi)輸入信號幅度(du)大小與極(ji)性。

三、工作方法

帶電(dian)(dian)電(dian)(dian)纜設備儀信號(hao)發生(sheng)器由交(jiao)流電(dian)(dian)源供(gong)電(dian)(dian)，它(ta)對已斷電(dian)(dian)的(de)、要識(shi)別的(de)電(dian)(dian)纜加上(shang)固定周期單極性的(de)直流脈沖。工(gong)作(zuo)時，將發生(sheng)器輸出線連在電(dian)(dian)纜芯線和接地點(dian)(dian)或(huo)地釘上(shang)，該(gai)電(dian)(dian)纜線鎧裝與(yu)大(da)地斷開，芯線在遠(yuan)端(duan)與(yu)接地點(dian)(dian)或(huo)地釘相連，該(gai)回(hui)路可傳導脈沖電(dian)(dian)流，它(ta)可由識(shi)別儀上(shang)的(de)表頭(tou)讀出，電(dian)(dian)流大(da)小(xiao)由環(huan)路電(dian)(dian)阻決定，環(huan)路電(dian)(dian)阻應盡可能小(xiao)。

為保(bao)證(zheng)(zheng)環(huan)路電(dian)阻(zu)的阻(zu)抗(kang)盡可(ke)能低，地釘(ding)與(yu)(yu)地之間要保(bao)證(zheng)(zheng)接(jie)觸(chu)良(liang)好（將(jiang)地釘(ding)附近的地方弄濕(shi)）。發射機與(yu)(yu)電(dian)纜(lan)連接(jie)正確但無(wu)輸(shu)出(chu)，說(shuo)明(ming)環(huan)路電(dian)阻(zu)太大(da)或未構成測試回路，應(ying)檢查終端接(jie)地。【將(jiang)發射機兩輸(shu)出(chu)夾短接(jie)，表頭有輸(shu)出(chu)，證(zheng)(zheng)明(ming)儀器完好】警告：為確保(bao)人身安(an)全，對已確定的電(dian)纜(lan)，在維修開(kai)鋸前(qian)，一定要進(jin)行扎釘(ding)試驗，可(ke)選DS1102型電(dian)纜(lan)安(an)全刺扎器。

四、配套

帶電(dian)電(dian)纜設備(bei)儀主機　　　1臺　　　　

電源線　　　1條

帶(dai)電(dian)電(dian)纜設備儀接收機　　1臺　　　

說明書　　　1本

合(he)格(ge)證　　　　　　　　　　1份　　　　

測試線　　　2條

保(bao)修卡　　　　　　　　　　1份

注：1.測試時電流鉗上的紅色箭(jian)頭標(biao)記指向電纜遠端(duan)！

2.發射機輸(shu)出(chu)電流調節大也超(chao)不過(guo)5A時(shi)，應檢查接地(di)(di)電阻(zu)，也可另打地(di)(di)釬。【對端(duan)(duan)芯(xin)線接地(di)(di)后，在首端(duan)(duan)測量芯(xin)地(di)(di)間電阻(zu)越小(xiao)，輸(shu)出(chu)電流越大】

3.發射機(ji)正(zheng)常工作電流(liu)應調到(dao)大于10A小于30A[5A可工作]，電流(liu)大時接收機(ji)指示明顯。發射機(ji)輸(shu)出正(zheng)常但接收機(ji)無指示，大多是卡鉗(qian)口未閉合，請張開鉗(qian)口，快速(su)讓其卡、卡閉合幾次(ci)就可解決問(wen)題。