質量差電(dian)線重(zhong)量不(bu)足(zu),或長度不(bu)夠,或電(dian)線銅芯(xin)雜(za)質過多(duo)(duo)。4mm2的(de)塑料絕緣單(dan)股(gu)銅芯(xin)線,每100m重(zhong)量為4.1-4.2kg等。符(fu)合(he)要求的(de)銅芯(xin)電(dian)線銅芯(xin)應是紫(zi)紅色,有光澤,手感(gan)柔軟,而劣(lie)質銅芯(xin)銅芯(xin)為紫(zi)黑、偏(pian)黃或偏(pian)白,雜(za)質多(duo)(duo),機械強度差,韌性差,稍(shao)加用力(li)就會折斷,且電(dian)線內(nei)常有斷線現(xian)象
2020-11-05變(bian)(bian)頻器大電(dian)容(rong)后發生快熔斷開,或IGBT逆變(bian)(bian)模(mo)塊(kuai)損(sun)壞時(shi),驅動電(dian)路(lu)基本上(shang)不可能完好無損(sun),切(qie)不可換裝好的(de)(de)快熔或IGBT逆變(bian)(bian)模(mo)塊(kuai),這(zhe)樣很容(rong)易造成換裝好的(de)(de)器件再次(ci)損(sun)壞,此時(shi)應重點檢查下驅動。此處可先拔(ba)掉IGBT逆變(bian)(bian)模(mo)塊(kuai)的(de)(de)驅動腳連接線,用萬用表電(dian)阻擋測量六路(lu)驅動電(dian)路(lu)是否(fou)具有相同的(de)(de)阻值(但(dan)極個...
2020-11-04當接地(di)電(dian)(dian)(dian)阻的電(dian)(dian)(dian)阻太(tai)大時,變壓器(qi)的電(dian)(dian)(dian)涌放(fang)(fang)電(dian)(dian)(dian)器(qi)不(bu)能正常放(fang)(fang)電(dian)(dian)(dian)到地(di)面,否(fou)則將導致放(fang)(fang)電(dian)(dian)(dian)器(qi)或變壓器(qi)燒毀
2020-11-03泄漏保護(hu)裝置(zhi)的主要(yao)用(yong)途是(shi):一是(shi)防止電(dian)氣設(she)備和線路因泄漏而(er)發生觸電(dian)事故;三(san)是(shi)及時切斷(duan)電(dian)氣設(she)備運行(xing)中的單相(xiang)接地故障,防止電(dian)氣火災(zai)漏電(dian)事故;漏電(dian)保護(hu)器(qi)主要(yao)由三(san)部分組成:檢測(ce)元件、中間(jian)放大環(huan)節和操(cao)作執行(xing)機構,其中檢測(ce)元件由零序變壓器(qi)組成,檢測(ce)漏電(dian)電(dian)流并發出信號
2020-11-03電(dian)纜耐壓(ya)(ya)(ya)試(shi)驗設備(bei)-直(zhi)流(liu)高壓(ya)(ya)(ya)發(fa)生器(qi)出現故障了怎么辦:直(zhi)流(liu)高壓(ya)(ya)(ya)發(fa)生器(qi)作為電(dian)纜耐壓(ya)(ya)(ya)試(shi)驗設備(bei)之一,其故障檢查與處理方法具體如下:檢查:打開電(dian)源開關控制箱數顯表亮,但高壓(ya)(ya)(ya)顯示綠燈不亮且加不上高壓(ya)(ya)(ya)請接好可靠(kao)的接地線,關閉電(dian)源,重(zhong)新(xin)啟動
2020-11-02