電(dian)容(rong)電(dian)流測(ce)試(shi)(shi)儀(yi)采(cai)用大(da)屏幕液晶顯示，中文菜單(dan)，操作非(fei)常簡(jian)便，且(qie)體(ti)積小、重量(liang)輕，電(dian)容(rong)電(dian)流測(ce)試(shi)(shi)儀(yi)由于從(cong)PT開口(kou)三角處(chu)注入的(de)是微弱的(de)異頻(pin)(pin)測(ce)試(shi)(shi)信號，所以既不(bu)會對繼電(dian)保護和PT本身產生任何影響(xiang)，又(you)避開了50Hz的(de)工(gong)頻(pin)(pin)干擾信號，同時測(ce)試(shi)(shi)儀(yi)的(de)輸出(chu)端可以耐受100V的(de)交流電(dian)壓，電(dian)容(rong)電(dian)流測(ce)試(shi)(shi)儀(yi)若測(ce)量(liang)時系(xi)統有單(dan)相接地故障發生，亦不(bu)會損壞PT和測(ce)試(shi)(shi)儀(yi)，因而無需做特(te)別(bie)的(de)安全措施(shi)，使這項工(gong)作變得安全、簡(jian)單(dan)、快捷，且(qie)測(ce)試(shi)(shi)結果準確、穩定(ding)、可靠。

一：產品概述

目(mu)前，我國配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)系(xi)統的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)源中(zhong)性點一(yi)(yi)般是(shi)不直(zhi)接接地(di)(di)的(de)(de)(de)(de)，所以當(dang)線(xian)路(lu)單相(xiang)接地(di)(di)時(shi)流(liu)過故障點的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)實際是(shi)線(xian)路(lu)對(dui)(dui)(dui)地(di)(di)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)產生(sheng)(sheng)的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)。據統計，配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)網的(de)(de)(de)(de)故障很大(da)(da)程度是(shi)由于線(xian)路(lu)單相(xiang)接地(di)(di)時(shi)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)過大(da)(da)而無法(fa)自行息弧(hu)引起的(de)(de)(de)(de)。因此，我國的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)力(li)規程規定當(dang)10kV和(he)(he)(he)35kV系(xi)統電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)分別(bie)大(da)(da)于30A和(he)(he)(he)10A時(shi)，應(ying)裝設(she)消弧(hu)線(xian)圈以補償電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)，這(zhe)(zhe)就要求對(dui)(dui)(dui)配(pei)(pei)網的(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)進行測(ce)量(liang)后做(zuo)決定。另(ling)外，配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)網的(de)(de)(de)(de)對(dui)(dui)(dui)地(di)(di)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)和(he)(he)(he)PT的(de)(de)(de)(de)參(can)數配(pei)(pei)合會(hui)產生(sheng)(sheng)PT鐵磁(ci)諧(xie)振(zhen)過電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。為了驗證(zheng)該(gai)配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)系(xi)統是(shi)否會(hui)發生(sheng)(sheng)PT諧(xie)振(zhen)及發生(sheng)(sheng)什么性質的(de)(de)(de)(de)諧(xie)振(zhen)，也必須(xu)準確測(ce)量(liang)配(pei)(pei)電(dian)(dian)(dian)(dian)(dian)(dian)網的(de)(de)(de)(de)對(dui)(dui)(dui)地(di)(di)電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)值。傳統的(de)(de)(de)(de)測(ce)量(liang)配(pei)(pei)網電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)方法(fa)有單相(xiang)金屬(shu)接地(di)(di)的(de)(de)(de)(de)直(zhi)接法(fa)、外加電(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)間(jian)接測(ce)量(liang)法(fa)等，這(zhe)(zhe)些方法(fa)都要接觸到一(yi)(yi)次設(she)備，因而存在(zai)試驗危險(xian)、操作繁雜，工作效(xiao)率(lv)低等缺點。

二、功能特點

直接從PT的二次側測量配電網的電容電流，無需和一次側打交道；
不存在試驗的危險性，無需做繁雜的安全措施和等待冗長的調度命令；
只需將測量線接于PT的開口三角端就可以測量出電容電流的數據；
PT開口三角處注入的微弱異頻測試信號，不會對繼電保護和PT本身產生任何影響，也避開了50Hz的工頻干擾信號；
輸出端可以耐受100V的交流電壓，測量時系統有單相接地故障發生，亦不會損壞PT和測試儀；
無需(xu)做特別的安(an)(an)全措施(shi)，使這(zhe)項工(gong)作變(bian)得(de)安(an)(an)全、簡單、快(kuai)捷，且測試結果準確、穩定(ding)、可靠。

三、技術參數

測量范圍   電容：0.3～125μF

           電(dian)流：1～250A

測(ce)量(liang)誤差   ≤5%

外形尺(chi)寸   345mm×295mm×175mm

儀器重量   5kg

四、使用條件

環境(jing)溫度   -10℃～50℃

環境濕度   ≤85%RH

工作電源   AC220V±20%

電源(yuan)頻率(lv)   50±5Hz