基本信息
标准名称: | 1800MHz SCDMA宽带无线接入系统 系统技术要求 |
发布部门: | 工业和信息化部 |
发布日期: | 2011-01-01 |
实施日期: | 2011-01-01 |
首发日期: | |
作废日期: | |
出版社: | 人民邮电出版社 |
出版日期: | 2011-01-01 |
适用范围
本标准规定了采用码扩正交频分多址(CS-OFDMA)工作方式的SCDMA 宽带无线接入系统的技术要求,包括:系统参考模型;工作频段、接口、功能、业务等技术要求;基站、业务汇聚网关等设备或模块的功能、性能指标、电源、环境适应性和电磁兼容等要求;以及操作维护要求。
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所属分类: 综合 标志 包装 运输 贮存 包装材料与容器 货物的包装和调运 麻袋 袋子
【英文标准名称】:Portableelectrictools
【原文标准名称】:便携式电动工具
【标准号】:UL745-1-2007
【标准状态】:现行
【国别】:美国
【发布日期】:2007-06-15
【实施或试行日期】:
【发布单位】:美国保险商实验所(US-UL)
【起草单位】:UL
【标准类型】:()
【标准水平】:()
【中文主题词】:分类系统;定义;设计;电动工具;电气工程;电气安全;电子工程;手工工具;危害;力学;便携的;安全;安全要求;测试;工具
【英文主题词】:Classificationsystems;Definition;Definitions;Design;Electrictools;Electricalengineering;Electricalsafety;Electronicengineering;Handtools;Hazards;Mechanic;Portable;Safety;Safetyrequirements;Testing;Tools
【摘要】:Thisstandardappliestohand-heldportableelectricmotor-operatedormagnetically-driventools,intendedforindoororoutdooruse,innon-hazardouslocations,inaccordancewiththeCanadianElectricCode,Part1andtheNationalElectricalCode(NFPA70).Itappliestotoolsratednotmorethan440V(notmorethan250Vfortoolsemployingauniversalmotor).Hand-heldelectricmotor-operatedtools,hereinafterreferredtoastools,whichcanbemountedonasupportforuseasfixedtoolswithoutanyalterationofthetoolitself,arewithinthescopeofthisstandard.Toolswithanelectricheatingelementincorporatedarewithinthescopeofthisstandard,butsuchtoolsshouldalsocomplywithIEC335-1:SafetyofHouseholdandSimilarElectricAppliances,Part1:GeneralRequirements,asfarasitreasonablyapplies.Specialrequirementsforbattery-poweredtoolswillbedeterminedinPart2.Requirementsconcerningmechanicalsafety,however,willalsoapplyforthesetoolsaredefinedinUL745-3andC22.2No.745-3.Specialrequirementsforexchangetypetools(seedefinition2.2(16))areunderconsideration.Moreover,therequirementsofthisstandardapplywhereappropriate.Fortoolsintendedtobeusedonboardshipsoraircraft,additionalrequirementsmaybenecessary,andinhazardouslocations,forexample,whereexplosionsareliabletooccur,specialconstructionsmayberequired.Fortoolsintendedtobeusedintropicalcountries,specialrequirementsmaybenecessary.Thisstandardappliestoaccessoriesandmechanicalattachmentsforusewithportableelectrictools.TheserequirementsareoutlinedinAppendixf.Thisstandardappliestoattachmentsthatcontainelectricalandelectroniccomponents.Inthiscase,theattachmentshallbeevaluatedwiththetoolandadeterminationmustbemadeastowhichclausesapply.ThisStandardappliesto,butthescopeisnotlimitedto:handtools,suchasdrills,screwdrivers,nutrunners,tappers,hammers,impactwrenches,saws,sanders,polishers,buffers,shears,nibblers,grinders,staplers,valveseatgrindersandlappers,cylinderborers,andconcretevibrators;transportabletools,suchasdiamondcoredrills,draincleaners,magneticdrillspresses,pipethreaders,andpipebenders.Thisstandarddoesnotapplytofixedorstationaryelectrictools,gardeningappliances,garageequipment,solderingironsorguns,paintingequipment,floor-finishingmachines,heatguns,orotherequipmentcoveredbyindividualrequirements.CoveredwithinthisstandardareClassI,II,andIIItools.Thisstandardisconcernedwithsafetyandtakesintoaccounttheinfluenceonsafetyofcomponentsnecessarytoachievearequireddegreeofradioandtelevisioninterferencesuppression.
【中国标准分类号】:K64
【国际标准分类号】:25_140_20
【页数】:
【正文语种】:英语