10KV-110KV電纜(lan)耐壓(ya)測試(shi)儀(yi)綜合評價

1、(諧(xie)振電(dian)抗器、分壓(ya)器、勵磁變壓(ya)器等)應盡量靠近(jin)被(bei)試(shi)電(dian)纜(lan)頭，減(jian)少(shao)(shao)試(shi)驗接地(di)線(xian)的長度(du)，即減(jian)少(shao)(shao)接地(di)線(xian)的電(dian)感量。

揚州豪泰(tai)考慮(lv)(lv)串聯(lian)諧(xie)振回路(lu)電(dian)(dian)(dian)(dian)感(gan)L值時，應(ying)考慮(lv)(lv)調(diao)壓(ya)器的(de)電(dian)(dian)(dian)(dian)感(gan)，即回路(lu)電(dian)(dian)(dian)(dian)感(gan)應(ying)為(wei)消(xiao)弧線圈(quan)的(de)電(dian)(dian)(dian)(dian)感(gan)值和調(diao)壓(ya)器電(dian)(dian)(dian)(dian)感(gan)值之和。若不(bu)(bu)考慮(lv)(lv)調(diao)壓(ya)器的(de)電(dian)(dian)(dian)(dian)感(gan)值，會導致電(dian)(dian)(dian)(dian)容(rong)器匹配不(bu)(bu)當。工作點(dian)偏離調(diao)諧(xie)點(dian)較遠，調(diao)諧(xie)幅值也(ye)低。若考慮(lv)(lv)調(diao)壓(ya)器的(de)電(dian)(dian)(dian)(dian)感(gan)值時，一般(ban)可將消(xiao)弧線圈(quan)的(de)電(dian)(dian)(dian)(dian)感(gan)值再加大(da)3.5% ~4%即可。

2、采用專配的一點接地式(shi)試(shi)(shi)驗接地線(xian)(xian)組。電(dian)纜耐壓諧振(zhen)儀特別注意試(shi)(shi)驗接地線(xian)(xian)應盡可能的短，不要(yao)(yao)任意延長接地線(xian)(xian)長度。試(shi)(shi)驗時(shi)操作人員除接觸(chu)調諧、調壓絕緣旋(xuan)鈕外(wai)，不要(yao)(yao)觸(chu)及控制箱金屬外(wai)殼，否(fou)則在高壓側(ce)擊穿或放電(dian)時(shi)，可能有輕(qing)微的痛感(gan)。

由于被(bei)試(shi)電(dian)纜(lan)的(de)電(dian)容(rong)量較大，若電(dian)纜(lan)耐壓測試(shi)儀在(zai)試(shi)驗時試(shi)品擊(ji)穿或發生高壓引線(xian)對地(di)(di)放電(dian)，在(zai)電(dian)纜(lan)的(de)接(jie)地(di)(di)端處，試(shi)驗接(jie)地(di)(di)線(xian)和控制箱(xiang)(xiang)外(wai)殼等處，可能會產(chan)生暫(zan)態過電(dian)壓。本設備已在(zai)控制箱(xiang)(xiang)和主要部件(jian)內，采取多重(zhong)暫(zan)態過電(dian)壓保護措施，能保證(zheng)設備的(de)正常工作。

當測試(shi)波形比較亂時可(ke)以多(duo)(duo)動作(zuo)(zuo)開關幾十次再做(zuo)試(shi)驗，因為(wei)如果是新投運的(de)(de)變(bian)壓器(qi)或運行(xing)中有載(zai)調壓不頻繁的(de)(de)變(bian)壓器(qi)，它的(de)(de)有載(zai)分(fen)接開關的(de)(de)觸頭上會形成(cheng)一(yi)定的(de)(de)氧(yang)化膜，多(duo)(duo)動作(zuo)(zuo)是為(wei)了(le)將其磨掉，使測試(shi)波形正常。

變壓器有載分接開關測試儀(yi)波形分析過(guo)程，當波形做出來后(hou)，儀(yi)器會自動計算出每相(xiang)的過(guo)渡電(dian)阻、過(guo)渡時(shi)間(jian)(jian)這個(ge)值是一(yi)個(ge)參(can)考(kao)值，如果波形的變化(hua)不是很規則，或尖峰毛刺比較多，就必須用儀(yi)器的阻值標(biao)尺和(he)時(shi)間(jian)(jian)標(biao)尺來分析具(ju)體(ti)每一(yi)段(duan)的過(guo)渡電(dian)阻值，和(he)過(guo)渡時(shi)間(jian)(jian)值，具(ju)體(ti)分析參(can)考(kao)說明書即可。

當其中一(yi)(yi)相(xiang)出現問(wen)題(ti)時，可(ke)(ke)以將(jiang)測試鉗倒換(huan)一(yi)(yi)下再確(que)定一(yi)(yi)次，例(li)如儀器顯示A相(xiang)有問(wen)題(ti)，可(ke)(ke)將(jiang)A、B的測試夾(jia)交換(huan)一(yi)(yi)下再測試，則儀器顯示B相(xiang)有問(wen)題(ti)，可(ke)(ke)以證(zheng)明(ming)儀A相(xiang)的確(que)有問(wen)題(ti)。

10KV-110KV電(dian)纜耐壓(ya)測試儀激(ji)勵變壓(ya)器接線(xian)用法：

用(yong)于10kV電纜(lan)的(de)耐壓(ya)(ya)裝置(zhi)，激勵變高電壓(ya)(ya)輸出部分(fen)和電抗器之間連接(jie)，一般接(jie)電壓(ya)(ya)低一些的(de)電壓(ya)(ya)端，比如接(jie)線找(zhao)1-2kV的(de)接(jie)線端子；

用于35kV電(dian)(dian)(dian)纜的耐壓(ya)(ya)裝(zhuang)置(zhi)，35kV電(dian)(dian)(dian)纜的耐壓(ya)(ya)，激勵變高(gao)電(dian)(dian)(dian)壓(ya)(ya)輸出部分和電(dian)(dian)(dian)抗(kang)器之間連接(jie)，一(yi)般接(jie)電(dian)(dian)(dian)壓(ya)(ya)較高(gao)一(yi)點(dian)的電(dian)(dian)(dian)壓(ya)(ya)端，比(bi)如接(jie)線找3-4kV的接(jie)線端子；

用(yong)于(yu)110kV電纜(lan)(lan)的耐壓裝置，110kV電纜(lan)(lan)的耐壓，激勵變高電壓輸(shu)出部(bu)分和(he)電抗器之間連(lian)接(jie)，比如接(jie)線找(zhao)4-6kV的接(jie)線端子；

激勵(li)變(bian)什么情況下用(yong)(yong)(yong)(yong)串聯和并聯，高電(dian)(dian)(dian)壓(ya)小電(dian)(dian)(dian)流(liu)試(shi)驗(yan)一般采(cai)(cai)用(yong)(yong)(yong)(yong)串聯，比如變(bian)壓(ya)器，開關，GIS等試(shi)驗(yan)，激勵(li)變(bian)就(jiu)(jiu)(jiu)要(yao)采(cai)(cai)用(yong)(yong)(yong)(yong)高電(dian)(dian)(dian)壓(ya)的電(dian)(dian)(dian)壓(ya)端(duan)子(zi)接線，這時激勵(li)變(bian)外部端(duan)子(zi)就(jiu)(jiu)(jiu)要(yao)串聯使用(yong)(yong)(yong)(yong)；低電(dian)(dian)(dian)壓(ya)大電(dian)(dian)(dian)流(liu)試(shi)驗(yan)一般采(cai)(cai)用(yong)(yong)(yong)(yong)并聯，比如電(dian)(dian)(dian)纜(lan)，發電(dian)(dian)(dian)機等試(shi)驗(yan)，激勵(li)變(bian)就(jiu)(jiu)(jiu)要(yao)采(cai)(cai)用(yong)(yong)(yong)(yong)低電(dian)(dian)(dian)壓(ya)的電(dian)(dian)(dian)壓(ya)端(duan)子(zi)接線，這時激勵(li)變(bian)外部端(duan)子(zi)一般就(jiu)(jiu)(jiu)要(yao)并聯使用(yong)(yong)(yong)(yong)。

電纜耐壓測試儀主機發生(sheng)故障后，不(bu)要自(zi)行拆開機箱(xiang)維修(xiu)

110KV高壓(ya)電纜(lan)耐壓(ya)測試(shi)(shi)儀由于諧振(zhen)原(yuan)理(li)中(zhong)理(li)論可以(yi)將低壓(ya)電壓(ya)諧振(zhen)到80倍(bei)（由于品質因(yin)數等(deng)關系一般(ban)(ban)不超過(guo)30倍(bei)），變頻(pin)(pin)串(chuan)聯諧振(zhen)試(shi)(shi)驗裝置掃(sao)頻(pin)(pin)時需要的(de)電壓(ya)一般(ban)(ban)為(wei)20-50V，通(tong)過(guo)激勵變后的(de)電壓(ya)一般(ban)(ban)為(wei)幾(ji)百伏。

通過以(yi)上原理我們發現，如(ru)果我們需要(yao)的(de)試品試驗電(dian)(dian)壓(ya)小(xiao)于系統(tong)諧(xie)振(zhen)時(shi)諧(xie)振(zhen)點時(shi)的(de)電(dian)(dian)壓(ya)，系統(tong)可能(neng)在自動尋找諧(xie)振(zhen)點時(shi)就出(chu)現過電(dian)(dian)壓(ya)保護，此時(shi)整個變頻(pin)串聯(lian)諧(xie)振(zhen)試驗裝(zhuang)置是無法及時(shi)耐壓(ya)，試驗也是無法完成的(de)。

試(shi)驗(yan)時，對試(shi)驗(yan)現場(chang)要劃安(an)全(quan)區域

在做試驗前(qian)，應先檢查(cha)儀器(qi)是否(fou)完好(hao)無(wu)損，各連接導線是否(fou)完好(hao)，確保電源輸出，信號采樣線纜穩妥連接，導通無(wu)阻。