ASTM E 1923-1997 陆地和湿地植被取样的标准指南
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【英文标准名称】:StandardGuideforSamplingTerrestrialandWetlandsVegetatio
【原文标准名称】:陆地和湿地植被取样的标准指南
【标准号】:ASTME1923-1997
【标准状态】:现行
【国别】:美国
【发布日期】:1997
【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】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:环境;环境管理;污染控制;规范(验收);植被
【英文主题词】:Environment;Environmentalmanagements;Pollutioncontrol;Specification(approval);Vegetation
【摘要】:
【中国标准分类号】:Z04
【国际标准分类号】:13_020_10
【页数】:19P;A4
【正文语种】:英语
【英文标准名称】:Railwayapplications-Electromagneticcompatibility-Part5:Emissionandimmunityoffixedpowersupplyinstallationsandapparatus
【原文标准名称】:铁路设施.电磁兼容性.固定电源设备的辐射和抗干扰
【标准号】:BSEN50121-5-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-09-29
【实施或试行日期】:2006-09-29
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;电力系统;电气设备;电气工程;电驱动装置;电子仪器;电磁兼容性;供能系统(建筑物);干扰辐射;极限(数学);无线电干扰;铁路设施;铁路固定设备;铁路;固定的;试验;牵引电网
【英文主题词】:Definition;Definitions;Electricpowersystems;Electricalappliances;Electricalengineering;Electrically-operateddevices;Electromagneticcompatibility;Electronicinstruments;EMC;Energysupplysystems(buildings);Frequencyranges;Interferencerejections;Interferences;Interferingemissions;Limits(mathematics);Measurement;Radiodisturbances;Railwayapplications;Railwayfixedequipment;Railwayinstallations;Railways;Stationary;Tractionnetwork
【摘要】:ThisEuropeanStandardappliestoemissionandimmunityaspectsofEMCforelectricalandelectronicapparatusandsystemsintendedforuseinrailwayfixedinstallationsassociatedwithpowersupply.Thisincludesthepowerfeedtotheapparatus,theapparatusitselfwithitsprotectivecontrolcircuits,tracksideitemssuchasswitchingstations,powerautotransformers,boostertransformers,substationpowerswitchgearandpowerswitchgeartootherlongitudinalandlocalsupplies.Filtersoperatingatrailwaysystemvoltage(forexample,forharmonicsuppressionorpowerfactorcorrection)arenotincludedinthisstandardsinceeachsitehasspecialrequirements.Filterswouldnormallyhaveseparateenclosureswithseparaterulesforaccess.Ifelectromagneticlimitsarerequired,thesewillappearinthespecificationfortheequipment.Thelimitsinthisstandarddonotapplytointentionalcommunicationsignals.Thefrequencyrangeconsideredisfromd.c.to400GHz.Nomeasurementsneedtobeperformedatfrequencieswherenorequirementisspecified.Emissionandimmunitylimitsaregivenforitemsofapparatuswhicharesituated:a)withintheboundaryofasubstationwhichdeliverselectricpowertoarailway;b)besidethetrackforthepurposeofcontrollingorregulatingtherailwaypowersupply,includingpowerfactorcorrectionandfiltering;c)alongthetrackforthepurposeofsupplyingelectricalpowertotherailwayotherthanbymeansoftheconductorsusedforcontactcurrentcollection,andassociatedreturnconductors.Includedarehighvoltagefeedersystemswithintheboundaryoftherailwaywhichsupplysubstationsatwhichthevoltageisreducedtotherailwaysystemvoltage.NOTE1Examplesareoneconductorofa25-0-25kV50Hzsystemandthe110kV16,7Hzsupplysystems.NOTE2Similarconductorswhichareoutsidetherailwayboundaryaretreatedasinthepublicareaandareconsideredtobegeneraloverheadpowerlinesalthoughtheyfeedonlytherailway.d)besidethetrackforcontrollingorregulatingelectricpowersuppliestoancillaryrailwayuses.Thiscategoryincludespowersuppliestomarshallingyards,maintenancedepotsandstations;e)variousothernon-tractionpowersuppliesfromrailwaysourceswhicharesharedwithrailwaytraction.Apparatusandsystemswhichareinanenvironmentwhichcanbedescribedasresidential,commercialorlightindustry,evenwhenplacedwithinthephysicalboundaryoftherailwaysubstation,shallcomplywiththerelevantgenericEuropeanEMCstandard.ExcludedfromtheimmunityrequirementsofthisstandardispowersupplyapparatuswhichisintrinsicallyimmunetothetestsdefinedinTables1to6ofthisstandard.NOTE3Anexampleisan18MVA230kVto25kVpowersupplytransformer.ThesespecificprovisionsaretobeusedinconjunctionwiththegeneralprovisionsinEN50121-1.Thispartofthestandardcoversrequirementsforbothapparatusandfixedinstallations.ThesectionsforfixedinstallationsarenotrelevantforCEmarking.
【中国标准分类号】:S04;L06
【国际标准分类号】:29_280;33_100_01;45_020
【页数】:22P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 齿纹弯头压板 |
| 中标分类： |
机械 >>
工艺装备 >>
组合卡具 |
| 发布日期： | 1987-04-08 |
| 实施日期： | 1987-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 1页 |
适用范围
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所属分类： 机械 工艺装备 组合卡具
