IEC 60502-4-1997 额定电压1～30kV挤压绝缘电力电缆及其附件第4部分:额定电压6～30kV电缆用附件的试验要求
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【英文标准名称】:Powercableswithextrudedinsulationandtheiraccessoriesforratedvoltagesfrom1kV(U
【原文标准名称】:额定电压1～30kV挤压绝缘电力电缆及其附件第4部分:额定电压6～30kV电缆用附件的试验要求
【标准号】:IEC60502-4-1997
【标准状态】:作废
【国别】:国际
【发布日期】:1997-03
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/SC20A
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;高压电器;高压引线;电缆;电缆;试验要求;电气工程;绝缘电缆
【英文主题词】:testing;cables;electricalengineering;hightensionleads;testingrequirements;high-voltageequipment;electriccables;insulatedcables
【摘要】:
【中国标准分类号】:K13
【国际标准分类号】:29_060_20
【页数】:26P;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodsforDeterminationoftheSoilWaterChararcteristicCurveforDesorptionUsingaHangingColumn,PressureExtractor,ChilledMirrorHygrometer,and/orCentrifuge
【原文标准名称】:使用悬垂柱、压力萃取器、冷镜式湿度计和/或离心分离机测定土壤水解吸性能曲线的标准试验方法
【标准号】:ASTMD6836-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D18.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:离心机;柱;曲面;解吸;测定;萃取器;湿度计;镜子;压力;土壤水;土壤
【英文主题词】:capillarypressure;chilledmirrorhygrometer;gravimetricwatercontent;hangingcolumn;matricpotential;matricsuction;pressuremembrane;pressureplate;soil;soilwatercharacteristiccurve;suction;totalsuction;volumetricwatercontent;wateractivity;
【摘要】:Thesoilwatercharacteristiccurve(SWCC)isfundamentaltohydrologicalcharacterizationofunsaturatedsoilsandisrequiredformostanalysesofwatermovementinunsaturatedsoils.TheSWCCisalsousedincharacterizingtheshearstrengthandcompressibilityofunsaturatedsoils.TheunsaturatedhydraulicconductivityofsoilisoftenestimatedusingpropertiesoftheSWCCandthesaturatedhydraulicconductivity.Thismethodappliesonlytosoilscontainingtwoporefluids:agasandaliquid.Theliquidisusuallywaterandthegasisusuallyair.Otherliquidsmayalsobeused,butcautionmustbeexercisediftheliquidbeingusedcausesexcessiveshrinkageorswellingofthesoilmatrix.Afullinvestigationhasnotbeenconductedregardingthecorrelationbetweensoilwatercharacteristiccurvesobtainedusingthismethodandsoilwatercharacteristicscurvesofin-placematerials.Thus,resultsobtainedfromthismethodshouldbeappliedtofieldsituationswithcautionandbyqualifiedpersonnel.Note18212;Thequalityoftheresultproducedbythisstandarddependsonthecompetenceofthepersonnelperformingthetestandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting,sampling,inspection,etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfensurereliableresults.Reliableresultsdependonmanyfactors.PracticeD3740providesameansofevaluatingsomeofthesefactors.1.1Thistestmethodcoversthedeterminationofsoilwatercharacteristiccurves(SWCCs)fordesorption(drying).SWCCsdescribetherelationshipbetweensuctionandvolumetricwatercontent,gravimetricwatercontent,ordegreeofwatersaturation.SWCCsarealsoreferredtoassoilwaterretentioncurves,soilwaterreleasecurves,orcapillarypressurecurves.1.2Thisstandarddescribesfivemethods(A-E)fordeterminingthesoilwatercharacteristiccurve.MethodA(hangingcolumn)issuitableformakingdeterminationsforsuctionsintherangeof0to80kPa.MethodB(pressurechamberwithvolumetricmeasurement)andMethodC(pressurechamberwithgravimetricmeasurement)aresuitableforsuctionsintherangeof0to1500kPa.MethodD(chilledmirrorhygrometer)issuitableformakingdeterminationsforsuctionsintherangeof500kPato100MPa.MethodE(centrifugemethod)issuitableformakingdeterminationsintherange0to120kPa.MethodAtypicallyisusedforcoarsesoilswithlittlefinesthatdrainreadily.MethodsBandCtypicallyareusedforfinersoilswhichretainwatermoretightly.MethodDisusedwhensuctionsnearsaturationarenotrequiredandcommonlyisemployedtodefinethedryendofthesoilwatercharacteristiccurve(thatis,watercontentscorrespondingtosuctions>1000kPa).MethodEistypicallyusedforcoarsersoilswhereanappreciableamountofwatercanbeextractedwithsuctionsupto120kPa.Themethodsmaybecombinedtoprovideadetaileddescriptionofthesoilwatercharacteristiccurve.Inthisapplication,MethodAorEisusedtodefinethesoilwatercharacteristiccurveatlowersuctions(0to80kPaforA,0to120kPaforE)nearsaturationandtoaccuratelyidentifytheairentrysuction,MethodBorCisusedtodefinethesoilwatercharacteristiccurveforintermediatewatercontentsandsuctions(100to1000kPa),andMethodDisusedtodefinethesoilwatercharacteristiccurvesatlowwatercontentsandhighersuctions(>1000kPa)and1.3AllobservedandcalculatedvaluesshallconformtotheguideforsignificantdigitsandroundingestablishedinPracticeD6026.TheproceduresinPracticeD6026......
【中国标准分类号】:B11
【国际标准分类号】:13_080_40
【页数】:20P.;A4
【正文语种】:
基本信息
| 标准名称： | 电视和声音信号的电缆分配系统设备与部件 第13部分:接收机变换器通用规范 |
| 英文名称： | Equipments and components used in cabled distribution systems primarily intended for television and sound signals. Part 13: Generic specifications for set top converter |
| 中标分类： |
通信、广播 >>
广播、电视设备 >>
广播、电视发送与接收设备 |
| ICS分类： |
电信、音频和视频技术 >>
电信设备用部件和附件 >>
导线和对称电缆
|
| 替代情况： | SJ/T 10471-1994 |
| 发布部门： | 国家广播电影电视总局 |
| 发布日期： | 1996-09-09 |
| 实施日期： | 1997-05-01 |
| 首发日期： | 1996-09-09 |
| 作废日期： | 2005-10-14 |
| 主管部门： | 国家广播电影电视总局 |
| 归口单位： | 全国广播电视标准化技术委员会 |
| 起草单位： | 电子工业部标准化研究所 |
| 出版日期： | 1900-01-01 |
| 页数： | 12页 |
适用范围
本标准规定了5MHZ~1750MHz电视和声音信号的电缆分配系统中接收机变换器（以下简称变换器）的要求、试验方法、检验规则以及标志、包装、运输和贮存等。本标准适用于5MHZ~1750MHz电视和声音信号的电缆分配系统中的接收机变换器。
前言
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引用标准
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所属分类： 通信 广播 广播 电视设备 广播 电视发送与接收设备 电信 音频和视频技术 电信设备用部件和附件 导线和对称电缆
