【英文标准名称】:StandardforSafetyforPowerConversionEquipment(8/10/07)
【原文标准名称】:功率转换设备的安全标准(8/10/07)
【标准号】:ANSI/UL508C-2008
【标准状态】:作废
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:控制与计算机技术;控制装置;控制工程;电力变换器;电动机;工业;动力传动系统
【英文主题词】:Controlandcomputertechnology;Controldevices;Controlengineering;Electricconvertors;Electricmotors;Industries;Powertransmissionsystems
【摘要】:Theserequirementscoveropenorenclosedequipmentthatsuppliespowertocontrolamotorormotorsoperatingatafrequencyorvoltagedifferentthanthatoftheinputsupply.Theserequirementsalsocoverpower-supplymodules,input/outputmodules,SiliconControlledRectifier(SCR)orTransistoroutputmodules,dynamicbrakingunits,andinput/outputaccessorykitsforusewithpowerconversionequipment.
【中国标准分类号】:K41
【国际标准分类号】:29_200
【页数】:
【正文语种】:英语


【英文标准名称】:Measurementofquartzcrystalunitparameters-Basicmethodforthemeasurementofresonancefrequencyandresonanceresistanceofquartzcrystalunitsbyzerophasetechniqueina-network
【原文标准名称】:石英晶体单元参数的测量.第1部分:用π型网络零相位技术测量石英晶体单元谐振频率和谐振电阻的基本方法
【标准号】:BSEN60444-1-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1993-09-15
【实施或试行日期】:1993-09-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:频率测量;补偿器(电气);介质装置;试验条件;再现性;校正;电路;相位测量(电);共振;石英;谐振器;晶体谐振器;波的性质和现象;压电器件;电阻;频率;共振频率;准确度;电波测量;电阻测量;电学测量;试验设备;电路网络
【英文主题词】:
【摘要】:Thisstandardspecifiesasimplemethodofmeasurementofresonancefrequencyandresonanceresistanceofquartzcrystalunitsanddescribesasuitablemeasuringnetwork.Themeasuringmethodandthenetworkaresuitableforuseoverthefrequencyrange1MHzto200MHzwithafractionalfrequencyaccuracyoftheorderof10withareproducibilityof10to10dependingonthetypeofcrystalunitbeingmeasured,andanaccuracyofthemeasurementofresonanceresistanceof±2%to±5%dependingontheaccuracyofthevoltagemeasurement.However,aboveapproximately100MHztheuseofthismeasuringmethodislimitedbytheeffectsoftheshuntcapacitanceC0ofthecrystalunitundertest.Toenablethemeasuringmethodtobeusedundertheseconditions,theuseofsomemethodofC0compensationisadvisable.AmethodofC0compensationwillbeissuedinIECPublication444-3asanIECreport.NOTEThemodificationstothemeasuringsystemandnetworkcontainedinthisstandardhavebeenintroducedtoensurethattheclaimscontainedwithinitareachievable.Theydonot,however,invalidatethenetworkproducedaccordingtothefirsteditionThesenetworksarestillacceptableasaninternationalstandardmethodofmeasurementofresonancefrequencyfxandresonanceresistanceRr.IfthereferenceresistorsdescribedinthestandardareslightlymodifiedtoallowinsertionintonetworksmanufacturedaccordingtothefirsteditionofPublication444thentheproblemofobtainingsatisfactoryreferenceresistorsissolved.
【中国标准分类号】:L21
【国际标准分类号】:31_140
【页数】:32P.;A4
【正文语种】:英语