一. 概述(Description)本型零序電流互感器為環氧樹脂澆注戶內型產品。適用于額定頻率50Hz或60Hz、額定電壓35kV及以下的小接地電流系統中作電纜接地保護用。與本系列電流互感器配套使用的繼電器型號為DD-11/60和DD-1/60。ThezerocurrenttransformerofthetypeLXKiscastingresinandindoorproduct.Itisusedforoverdrivencurrentprotectionintheelectricnon-useful-groundneutralsystemofratedfrequency50Hzor60Hzandratedvoltage35kV.ThetypesoftherelayfittingwiththetransformersareDD-11/60andDD-1/60. 二. 型號含義(Typedesignation) 三. 結構簡介(Construction)本型零序電流互感器為開合式。二次繞組及鐵芯均澆注在聚脂樹脂內。安裝時可將互感器分為兩半，中間窗孔供一次母線穿過，然后用螺栓擰緊。Thezerosequencecurrenttransformerisopen-closetype.Thesecondarywindingsandironcoreareinsulatedbyepoxyresin.Beinginstalledmaketheproductdimidiation,thenmakeitcoalitionusedbolt.Themiddleholeisusedforbusbargoingthrough. 四. 技術參數(Technicaldata)1.該型零序互感器的一次主絕緣由電纜保證，產品僅考核二次繞組的絕緣性能。二次繞組對地能承受3kV工頻耐壓。(Becausethecableprotectstheprimarymaininsulation,theinsulationcharacteristicsofsecondarywindingareonlyexamined.Thesecondarywindingcanbeabletowithstandthepowerfrequencytestvoltageof3kVtoground.) 2.零序電流互感器的靈敏度滿足下表的要求。(Thesensitivityoftheproductshallmeettherequirementslistedinform)繼電器型號Typeofrelay繼電器線圈連接方式Connectingmethodofrelaywindings繼電器刻度值Scaleofrelay(mA)一次零序電流Primaryzerosequencecurrent(A)DD-11/60串聯(series)15 1～30 12～5并聯(parallel)15 2～30 2DD-1/60串聯(series)15 1～30 13～6并聯(parallel)15 2～30 2