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DCTB電流互感器二次過(guo)電壓保護(hu)裝置
發布日期:2018-11-09  瀏覽次數:0
電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互感(gan)器(qi)（CT）在電(dian)(dian)(dian)(dian)力系統中，廣泛(fan)應用于一(yi)次(ci)(ci)保護(hu)、測量與控制。在正常工作時，互感(gan)器(qi)二(er)次(ci)(ci)側處于近似短路(lu)狀態，輸出電(dian)(dian)(dian)(dian)壓很低。當二(er)次(ci)(ci)繞(rao)組開路(lu)或一(yi)次(ci)(ci)繞(rao)組流(liu)(liu)(liu)過(guo)異常電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)（如雷電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)、諧(xie)振過(guo)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)、電(dian)(dian)(dian)(dian)容充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)、電(dian)(dian)(dian)(dian)感(gan)啟動電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)等），都會在二(er)次(ci)(ci)側產生(sheng)數千伏甚至上萬伏的過(guo)電(dian)(dian)(dian)(dian)壓。這(zhe)不僅(jin)給(gei)二(er)次(ci)(ci)系統絕緣(yuan)造成危害，還會使(shi)互感(gan)器(qi)過(guo)激而燒(shao)損(sun)，甚至危及工作人員的生(sheng)命安全。使(shi)用 DCTB-Ⅳ系列CT二(er)次(ci)(ci)過(guo)電(dian)(dian)(dian)(dian)壓保護(hu)裝置(zhi)（以(yi)下簡稱：DCTB裝置(zhi)）就(jiu)能(neng)夠有效防止因電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)互感(gan)器(qi)二(er)次(ci)(ci)側開路(lu)引起的事故。

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