一(yi)：全自動電容電流測試儀廠家 - 科拓電力產品概述

目前，我國(guo)配電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)統的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)源中性點一般(ban)是不直接接地的(de)(de)(de)，所以當線路(lu)單相(xiang)(xiang)接地時流(liu)(liu)過(guo)故障點的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)實際是線路(lu)對地電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)產生(sheng)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)。據統計，配電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)網的(de)(de)(de)故障很(hen)大程(cheng)度是由于線路(lu)單相(xiang)(xiang)接地時電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)過(guo)大而(er)無法(fa)(fa)自(zi)行息弧引起的(de)(de)(de)。因此，我國(guo)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)力(li)規程(cheng)規定當10kV和35kV系(xi)統電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)分(fen)別大于30A和10A時，應裝設消(xiao)弧線圈以補償電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)，這就要(yao)求對配網的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)進行測(ce)量(liang)后做決定。另(ling)外(wai)，配電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)網的(de)(de)(de)對地電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)和PT的(de)(de)(de)參數配合會(hui)產生(sheng)PT鐵(tie)磁(ci)諧振過(guo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。為(wei)了驗證該配電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)系(xi)統是否會(hui)發生(sheng)PT諧振及(ji)發生(sheng)什么性質的(de)(de)(de)諧振，也必須(xu)準確測(ce)量(liang)配電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)網的(de)(de)(de)對地電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)值(zhi)。傳統的(de)(de)(de)測(ce)量(liang)配網電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的(de)(de)(de)方法(fa)(fa)有單相(xiang)(xiang)金屬接地的(de)(de)(de)直接法(fa)(fa)、外(wai)加電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)間接測(ce)量(liang)法(fa)(fa)等(deng)，這些(xie)方法(fa)(fa)都(dou)要(yao)接觸(chu)到一次設備，因而(er)存在試驗危險、操作繁雜，工作效(xiao)率低(di)等(deng)缺點。

二、功能特點(dian)

• 直接(jie)從PT的二次側測量配電(dian)網的電(dian)容(rong)電(dian)流，無需和(he)一次側打交道(dao)；
• 不(bu)存在試驗的危險性(xing)，無(wu)需做繁雜(za)的安全措施和等待冗長的調度命令(ling)；
• 只需將測量線接于PT的開(kai)口(kou)三(san)角端就可(ke)以測量出電容電流(liu)的數據(ju)；
• PT開口三角處注入的(de)微弱異頻測試(shi)信(xin)號，不會(hui)對繼(ji)電(dian)保護(hu)和PT本身產生任何(he)影響，也避開了50Hz的(de)工頻干擾信(xin)號；
• 輸出端可以耐受100V的交流電(dian)壓，測量時系統(tong)有單(dan)相接地故障發生，亦不會損壞PT和(he)測試儀；
• 無需做特別的安全措施，使(shi)這項工作(zuo)變得安全、簡單、快捷，且測試結果準確、穩定、可靠。

三、全自動電容電流測試儀廠家 - 科拓電力技術參數

測(ce)量范(fan)圍   電容：0.3～125μF

           電流：1～250A

測量(liang)誤(wu)差   ≤5%

外形(xing)尺寸   345mm×295mm×175mm

儀(yi)器重(zhong)量(liang)   5kg

四(si)、使用(yong)條件(jian)

環(huan)境溫度   -10℃～50℃

環(huan)境濕(shi)度   ≤85%RH

工(gong)作電(dian)源   AC220V±20%

電源頻率(lv)   50±5Hz