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智能電表防(fang)竊電按功能(neng)(neng)原理分大體有以下兩(liang)種：一種是(shi)用戶通(tong)(tong)過電(dian)(dian)能(neng)(neng)表(biao)后(hou)采(cai)用幾種方式竊(qie)(qie)電(dian)(dian)時，電(dian)(dian)能(neng)(neng)表(biao)仍能(neng)(neng)計(ji)(ji)量或計(ji)(ji)量更(geng)快，目前市售防竊(qie)(qie)電(dian)(dian)能(neng)(neng)表(biao)多為(wei)這種類型。另一種是(shi)用戶通(tong)(tong)過電(dian)(dian)能(neng)(neng)表(biao)后(hou)竊(qie)(qie)電(dian)(dian)時，電(dian)(dian)能(neng)(neng)表(biao)立即斷電(dian)(dian)，竊(qie)(qie)電(dian)(dian)停止(zhi)后(hou)立即自(zi)動恢復供電(dian)(dian)。

智能電表防竊電技術原理

1.將一般電(dian)能(neng)(neng)表(biao)(biao)計(ji)(ji)數(shu)(shu)(shu)(shu)器(qi)改(gai)為帶有(you)換向輪機構的雙向計(ji)(ji)數(shu)(shu)(shu)(shu)器(qi)，此計(ji)(ji)數(shu)(shu)(shu)(shu)器(qi)為專利產品。當用(yong)電(dian)戶改(gai)變電(dian)流、電(dian)壓線(xian)圈性，用(yong)竊(qie)電(dian)器(qi)（原(yuan)理是改(gai)變電(dian)流與電(dian)壓的相位），或用(yong)其他方(fang)式等情況(kuang)使(shi)電(dian)能(neng)(neng)表(biao)(biao)鋁盤倒轉(zhuan)時，計(ji)(ji)數(shu)(shu)(shu)(shu)器(qi)通(tong)過(guo)換向機構一直保持電(dian)能(neng)(neng)表(biao)(biao)正(zheng)計(ji)(ji)數(shu)(shu)(shu)(shu)，則使(shi)用(yong)戶無法因采用(yong)以上手段使(shi)計(ji)(ji)數(shu)(shu)(shu)(shu)器(qi)倒計(ji)(ji)數(shu)(shu)(shu)(shu)。從(cong)而使(shi)防竊(qie)電(dian)能(neng)(neng)表(biao)(biao)具有(you)防倒轉(zhuan)、防倒線(xian)功能(neng)(neng)。

2.普(pu)通電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)表(biao)接線盒中電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓線圈(quan)掛(gua)鉤(gou)(gou)，一(yi)旦去掉，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)表(biao)由于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓線圈(quan)失電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)表(biao)就不轉了(le)(le)，用(yong)戶(hu)卻可以繼續用(yong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)，防竊電(dian)(dian)(dian)(dian)(dian)(dian)(dian)能(neng)表(biao)在表(biao)罩殼內(nei)又(you)增加了(le)(le)一(yi)個電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓掛(gua)鉤(gou)(gou)，接線盒內(nei)的(de)掛(gua)鉤(gou)(gou)去掉了(le)(le)，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)表(biao)內(nei)仍有掛(gua)鉤(gou)(gou)無法(fa)(fa)去掉，致使(shi)用(yong)戶(hu)無法(fa)(fa)用(yong)此手段竊電(dian)(dian)(dian)(dian)(dian)(dian)(dian)。供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)部(bu)門在營業(ye)普(pu)查時發現的(de)竊電(dian)(dian)(dian)(dian)(dian)(dian)(dian)戶(hu)不少是去掉電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓掛(gua)鉤(gou)(gou)竊電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)。

3.電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)總成由(you)原(yuan)來的(de)(de)(de)單(dan)一繞(rao)(rao)向(xiang)的(de)(de)(de)主(zhu)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)又增加了一個反(fan)(fan)(fan)向(xiang)繞(rao)(rao)向(xiang)的(de)(de)(de)副(fu)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)，正(zheng)反(fan)(fan)(fan)繞(rao)(rao)的(de)(de)(de)主(zhu)副(fu)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)串聯裝入表(biao)內，防(fang)竊電(dian)表(biao)的(de)(de)(de)主(zhu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)比一般表(biao)的(de)(de)(de)主(zhu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)繞(rao)(rao)組多(duo)，正(zheng)好增加了反(fan)(fan)(fan)繞(rao)(rao)的(de)(de)(de)副(fu)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)的(de)(de)(de)匝(za)數，這樣(yang)主(zhu)副(fu)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)串聯后，由(you)于副(fu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)反(fan)(fan)(fan)繞(rao)(rao)部(bu)分正(zheng)好抵(di)消了主(zhu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)中(zhong)多(duo)繞(rao)(rao)的(de)(de)(de)正(zheng)繞(rao)(rao)部(bu)分，因此，還(huan)等于一般表(biao)的(de)(de)(de)原(yuan)繞(rao)(rao)匝(za)數。假設(she)DD862－5（10）A表(biao)，一般表(biao)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)為(wei)8圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)，防(fang)竊電(dian)能(neng)(neng)(neng)表(biao)的(de)(de)(de)副(fu)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)為(wei)4圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)（反(fan)(fan)(fan)繞(rao)(rao)部(bu)分），則主(zhu)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)應為(wei)8＋4=12圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)。主(zhu)副(fu)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)串聯后由(you)于反(fan)(fan)(fan)繞(rao)(rao)4圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)抵(di)消了正(zheng)繞(rao)(rao)4圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)，實際上仍只(zhi)有正(zheng)繞(rao)(rao)8圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)，與一般表(biao)電(dian)流(liu)(liu)(liu)線(xian)(xian)圈(quan)(quan)(quan)(quan)(quan)(quan)(quan)匝(za)數一樣(yang)。2第二種防(fang)竊電(dian)能(neng)(neng)(neng)表(biao)功能(neng)(neng)(neng)原(yuan)理。

這種防竊(qie)電(dian)(dian)能(neng)表(biao)在表(biao)內加(jia)了一個控制(zhi)器(qi)(qi)(qi)，控制(zhi)器(qi)(qi)(qi)由互感(gan)器(qi)(qi)(qi)、繼電(dian)(dian)器(qi)(qi)(qi)和(he)電(dian)(dian)子線(xian)路組成。主(zhu)回路的(de)(de)相線(xian)零線(xian)從(cong)零序電(dian)(dian)流(liu)互感(gan)器(qi)(qi)(qi)線(xian)圈中穿過，正常工作時間兩(liang)條(tiao)線(xian)上的(de)(de)電(dian)(dian)流(liu)大(da)小(xiao)相等(deng)，方向(xiang)相反，在互感(gan)器(qi)(qi)(qi)中感(gan)應的(de)(de)信(xin)號相互抵(di)消，輸出(chu)信(xin)號為0，當用(yong)(yong)(yong)戶采用(yong)(yong)(yong)各種手(shou)段竊(qie)電(dian)(dian)時，進出(chu)線(xian)電(dian)(dian)流(liu)不一樣，兩(liang)條(tiao)線(xian)上的(de)(de)電(dian)(dian)流(liu)不相等(deng)，超過一定值時，繼電(dian)(dian)器(qi)(qi)(qi)就跳閘斷(duan)電(dian)(dian)，該功能(neng)也適用(yong)(yong)(yong)于漏(lou)電(dian)(dian)保(bao)護，所以不管漏(lou)電(dian)(dian)或竊(qie)電(dian)(dian)時，電(dian)(dian)能(neng)表(biao)立(li)(li)即斷(duan)電(dian)(dian)。排除以上偷電(dian)(dian)手(shou)段和(he)漏(lou)電(dian)(dian)后(hou)，立(li)(li)即自動恢(hui)復(fu)供電(dian)(dian)。

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