NF Z86-255-1994 卫星地面站和系统(SES).在11/12/14GHZ频带下运行提供低比特率数据通信的陆上移动地面站

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下一篇: NF Z82-184-1994 集成业务数字网(ISDN).电话会议补充服务.功能能力和信息流

【英文标准名称】:Safetyoftransformers,reactors,powersupplyunitsandcombinationsthereof-Part2-23:Particularrequirementsandtestsfortransformersandpowersupplyunitsforconstructionsites
【原文标准名称】:变压器、反应器、供电机组及其它们的组合的安全性.第2-23部分:建筑工地用变压器和供电机组的试验和详细要求
【标准号】:IEC61558-2-23-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC96
【标准类型】:()
【标准水平】:()
【中文主题词】:建筑工地;电路;建筑;施工设备;定义;尺寸规格;干式变压器;电气工程;电气安全;防火安全;图形符号;隔离变压器;电源设备;供电系统;电力变压器;防电击;安全性;安全隔离变压器;安全性要求;短路保护;小功率变压器;功率单位;电源电压;试验;变压器
【英文主题词】:Buildingsites;Circuits;Construction;Constructionequipment;Definitions;Dimensioning;Dry-typetransformers;Electricalengineering;Electricalsafety;Firesafety;Graphicsymbols;Isolatingtransformers;Mainsunits;Powersupplysystem;Powertransformers;Protectionagainstelectricshocks;Safety;Safetyisolatingtransformers;Safetyrequirements;Short-circuitprotection;Small-powertransformers;Supplyunits;Supplyvoltages;Testing;Transformers
【摘要】:ThispartofIEC61558dealswiththesafetyoftransformersforconstructionsitesandpowersupplyunitsincorporatingtransformersforconstructionsites.Transformersincorporatingelectroniccircuitsarealsocoveredbythisstandard.NOTE1Safetyincludeselectrical,thermalandmechanicalaspects.Unlessotherwisespecified,fromhereonward,thetermtransformercoverstransformersforconstructionsitesandpowersupplyunitsincorporatingtransformersforconstructionsites.Thispartisapplicabletostationaryorportable,single-phaseorpolyphase,air-cooled(naturalorforced)independentorassociatedtransformers,beingisolatingorsafetyisolatingdrytypetransformersfortheuseonconstructionsites.Thewindingsmaybeencapsulatedornon-encapsulated.Theratedsupplyvoltagedoesnotexceed1000Va.c.,andtheratedsupplyfrequencyandtheinternaloperatingfrequenciesdonotexceed500Hz.ThisstandardusedincombinationwithPart2-16forSwitchmodepowersupplyunits(SMPS)isalsoapplicabletopowersupplieswithinternaloperatingfrequencieshigherthan500Hz.WherethetworequirementsareinconflictthemostseveretakeprecedenceTheratedoutputdoesnotexceed:–25kVAforsingle-phasetransformers;–40kVAforpoly-phasetransformers.Thispartisapplicabletotransformerswithoutlimitationoftheratedoutputsubjecttoanagreementbetweenthepurchaserandthemanufacturer.NOTE2Transformersintendedtosupplydistributionnetworksarenotincludedinthescope.Isolatingtransformersandpowersupplyunitsincorporatingisolatingtransformersforconstructionsiteshaveano-loadoutputvoltageandaratedoutputvoltageexceeding50Va.c.andnotexceeding250Va.c.Safetyisolatingtransformersandpowersupplyunitsincorporatingsafetyisolatingtransformersforconstructionsiteshaveano-loadoutputvoltageandaratedoutputvoltagenotexceeding50Va.c.NOTE3ThisstandardisapplicabletotransformersforthesupplyofelectricityinlocationsasspecifiedinIEC60364-7-704.Thelatteralsospecifiestheprotectionbyusinganearthedmidpointorstarpointoftheoutputwinding.Transformersandpowersupplyunitscoveredbythispartareusedinapplicationswhereitisrequiredbytheinstallationrulesorbytheappliancespecificationforprotectionpurposes.WhenthetransformersorpowersupplyunitsareincorporatedintolowvoltageswitchgearandcontrolgearassembliesforconstructionsitesasspecifiedinIEC60439-4,theadditionalrequirementsofIEC60439-4willapplytotheassembly.NOTE4Fortransformersfilledwithliquiddielectricorpulverisedmaterial,suchassand,additionalrequirementsareunderconsideration.NOTE5Attentionisdrawntothefollowing:–measurestoprotecttheenclosureandthecomponentsinsidetheenclosureagainstexternalinfluenceslikefungus,vermin,termites,solar-radiationandicingshouldalsobeconsidered;–thedifferentconditionsfortransportation,storage,andoperationofthetransformersandpowersupplyunitsshouldalsobeconsidered;–additionalrequirementsinaccordancewithotherappropriatestandardsandnationalrulesmaybeapplicabletotransformersandpowersupplyunitsintendedforuseinspecialenvironmentssuchastropicalenvironment.NOTE6Futuretechnologicaldevelopmentoftransformersmaynecessitateaneedtoincreasetheupperlimitofthefrequencies,untilthenthisstandardmaybeusedasaguidancedocument.
【中国标准分类号】:K41
【国际标准分类号】:29_180
【页数】:46P.;A4
【正文语种】:英语


【英文标准名称】:Liquefiedpetroleumgases-Determinationofoilyresidues-High-temperaturemethod
【原文标准名称】:液化石油气油残余物的测定高温法
【标准号】:ISO13757-1996
【标准状态】:现行
【国别】:国际
【发布日期】:1996-07
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC28
【标准类型】:()
【标准水平】:()
【中文主题词】:沉淀分析;定义;渣油;测定;高温技术;液化石油气;蒸发残余物测定;蒸发残余物;含量测定;石油产品
【英文主题词】:Definitions;Determination;Determinationofcontent;Determinationprocedures;Evaporationresiduedetermination;Evaporationresidues;High-temperaturetechniques;Liquefiedpetroleumgas;Petroleumproducts;Residualoil;Residuetests
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationoftheresidualmatterinliquefiedpet-roleumgases(LPG)thatremainsafterevaporationat105℃.Thismaterial,termed"oilyresidues",rep-resentsthoseproductsthataredepositedinvaporizersthataresubjecttoaheatinputgreaterthanthatofambientevaporation.
【中国标准分类号】:E46
【国际标准分类号】:75_160_30
【页数】:7P.;A4
【正文语种】:英语