【英文标准名称】:Methodforestimatingtheaveragegrainsizeofcopperandcopperalloys
【原文标准名称】:铜和铜合金平均粒度的估定方法
【标准号】:BS7428-1991
【标准状态】:作废
【国别】:英国
【发布日期】:1991-04-30
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:面积仪;试样;计数;粒度;平均值;铜;铜合金;估计;图表;粒度测量;晶体微观结构
【英文主题词】:estimation;particlesizemeasurement;charts;planimeters;average;crystalmicrostructure;grainsize;copperalloys;copper;counting;testspecimens
【摘要】:
【中国标准分类号】:H21;H62
【国际标准分类号】:
【页数】:12P;A4
【正文语种】:英语


【英文标准名称】:Safetyofpowertransformers,powersupplyunitsandsimilar-Part2:Particularrequirementsforisolatingtransformersforgeneraluse
【原文标准名称】:电力变压器、电源装置及类似设备的安全第2-4部分:通用隔离变压器的特殊要求
【标准号】:IEC61558-2-4-1997
【标准状态】:作废
【国别】:国际
【发布日期】:1997-02
【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】:规范(验收);应用;电气工程;试验;供电系统;变压器;电力变压器;隔离变压器;电源设备;小功率变压器
【英文主题词】:Definition;Electricalengineering;Inputcurrents;Inputquantities;Inputvoltage;Isolatingtransformers;Mainsunits;Outputcurrents;Outputfrequency;Outputquantities;Outputvoltage;Performance;Powersupplysystem;Powertransformers;Safetyrequirements;Small-powertransformers;Specification(approval);Testing;Transformers;Use
【摘要】:Replacement:Thispart2ofIEC61558appliestostationaryorportable,single-phaseorpolyphase,air-cooledisolatingtransformers,associatedorotherwise,havingaratedsupplyvoltagenotexceeding1000Va.c.andratedfrequencynotexceeding500Hz,theratedoutputnotexceeding:-25kVAforsingle-phasetransformers;-40kVAforpolyphasetransformers.Thisstandardisalsoapplicabletoisolatingtransformerswithoutlimitationoftheratedoutput,howeversuchtransformersareconsideredasspecialtransformersandaresubjectedtoanagreementbetweenthepurchaserandthesupplier.Theno-loadoutputvoltageortheratedoutputvoltagedoesnotexceed500Va.c.or708Vripple-freed.c.NOTES1Theno-loadoutputvoltageortheratedoutputvoltagemaybeupto1000Va.c.or1415Vripple-freed.c.tobeinaccordancewiththenationalwiringrulesorforaspecialpurpose.2Thisstandardisapplicabletothoseisolatingtransformersusedwhentheinstallationrulescallfortheseparationofcircuitsforthesupplyofcertainpartsofthecircuitsorofequipment(portabletools,lawnmowers,etc.).Theno-loadoutputvoltageand/ortheratedoutputvoltageshallexceed50Va.c.and/or120Vripple-freed.c.Thisstandardisalsoapplicabletotransformersassociatedwithspecificitemsofequipment,totheextentdecideduponbytherelevantIECtechnicalcommittees.Thisstandardisapplicabletodrytypetransformers.Thewindingsmaybeencapsulatedornon-encapsulated.NOTES3Fortransformersfilledwithliquiddielectricorpulverizedmaterial,suchassand,additionalrequirementsareunderconsideration.4Inlocationswherespecialenvironmentalconditionsprevail,particularrequirementsmaybenecessaryinaccordancewithIEC364-5-51.
【中国标准分类号】:K41
【国际标准分类号】:29_180
【页数】:21P;A4
【正文语种】:英语