ANSI/TIA-102.BABA-2003 项目25.声码器描述

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标准名称：	机械天平检定规程
英文名称：	Verification Regulation for Mechanical Balance
中标分类：	综合 >> 计量 >> 力学计量
ICS分类：	计量学和测量、物理现象 >> 体积、质量、密度和粘度的测量
替代情况：	替代JJG 98-1990(机械天平部分)
发布部门：	国家质量监督检验检疫总局
发布日期：	2006-09-06
实施日期：	2007-03-06
首发日期：
作废日期：
归口单位：	全国密度计量技术委员会
起草单位：	中国计量科学研究院
起草人：	李占宏、柳建明
出版社：	中国计量出版社
出版日期：	2007-03-06
页数：	27页

本规程适用于机械杠杆式天平（以下简称天平）的首次检定、后续检定和使用中检验。

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【英文标准名称】:Electricalaccessories-Circuit-breakersforovercurrentprotectionforhouseholdandsimilarinstallations-Part1:Circuit-breakersfora.c.operation
【原文标准名称】:电气附件.家用和类似设施用的过电流保护断路器.第1部分:交流操作断路器
【标准号】:IEC60898-1-2002
【标准状态】:现行
【国别】:国际
【发布日期】:2002-01
【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/SC23E
【标准类型】:()
【标准水平】:()
【中文主题词】:电气设备;额定值;设计;分类系统;尺寸选定;特性;特性;电气工程;电力设备;过流断路器;线路开关;自动断路器;定义;交流断路器;寿命试验;断路器;开关;操作条件;开关电源;低压电器;试验条件;小型断路器;交流电流;过电流;试验;作标记;家用;过电流保护装置;家用设备
【英文主题词】:Alternatingcurrent;Alternating-currentcircuitbreakers;Auxiliarycircuits;Characteristics;Circuit-breakers;Clamps;Classificationsystems;Contactsafetydevices;Definitions;Design;Dimensioning;Electricalappliances;Electricalengineering;Electricalinstallations;Erecting(constructionoperation);Householdequipment;Householduse;Installations;Letterings;Lifetest;Lineswitch;Low-voltageequipment;Marking;Miniaturecircuit-breakers;Operatingconditions;Overcurrent;Overcurrentcircuit-breakers;Overcurrentprotection;Productinformation;Properties;Ratedvoltages;Ratings;Resistance;Self-actingcircuit-breakers;Switches;Switchingpower;Testing;Testingconditions
【摘要】:ThispartofIEC60898applies,toa.c.air-breakcircuit-breakersforoperationat50Hzor60Hz,havingaratedvoltagenotexceeding440V(betweenphases),aratedcurrentnotexceeding125Aandaratedshort-circuitcapacitynotexceeding25000A.Asfaraspossible,itisinlinewiththerequirementscontainedinIEC60947-2.Thesecircuit-breakersareintendedfortheprotectionagainstovercurrentsofwiringinstallationsofbuildingsandsimilarapplications;theyaredesignedforusebyuninstructedpeopleandfornotbeingmaintained.Theyareintendedforuseinanenvironmentwithpollutiondegree2.Theyaresuitableforisolation.Circuit-breakersofthisstandard,withexceptionofthoserated120Vor120/240V(seetable1),aresuitableforuseinITsystemsprovidedthattherequirementsofIEC60364-4-473:1977+A1:1998arecompliedwith.Thisstandardalsoappliestocircuit-breakershavingmorethanoneratedcurrent,providedthatthemeansforchangingfromonediscreteratingtoanotherisnotaccessibleinnormalserviceandthattheratingcannotbechangedwithouttheuseofatool.Thisstandarddoesnotapplyto-circuit-breakersintendedtoprotectmotors;-circuit-breakers,thecurrentsettingofwhichisadjustablebymeansaccessibletotheuser.Forcircuit-breakershavingadegreeofprotectionhigherthanIP20accordingtoIEC60529,foruseinlocationswherearduousenvironmentalconditionsprevail(e.g.excessivehumidity,heatorcoldordepositionofdust)andinhazardouslocations(e.g.whereexplosionsareliabletooccur),specialconstructionsmayberequired.Requirementsforcircuit-breakersfora.c.andd.c.operationaregiveninIEC60898-2.Requirementsforcircuit-breakerswhichincorporateresidualcurrenttrippingdevicesaretobefoundinIEC61009-1,IEC61009-2-1,andIEC61009-2-2.Aguideforco-ordinationundershort-circuitconditionsbetweenacircuit-breakerandanothershort-circuitprotectivedevice(SCPDs)isgiveninannexD.NOTE1Formoresevereovervoltageconditions,circuit-breakerscomplyingwithotherstandards(e.g.IEC60947-2)shouldbeused.NOTE2Foranenvironmentwithahigherpollutiondegree,enclosuresgivingtheappropriatedegreeofprotectionshouldbeused.NOTE3Circuit-breakerswithinthescopeofthisstandardmayalsobeusedforprotectionagainstelectricshockincaseoffault,dependingontheirtrippingcharacteristicsandonthecharacteristicsoftheinstallation.Thecriterionofapplicationforsuchpurposesisdealtwithbyinstallationrules.Thisstandardcontainsallrequirementsnecessarytoensurecompliancewiththeoperationalcharacteristicsrequiredforthesedevicesbytypetests.Italsocontainsthedetailsrelativetotestrequirementsandmethodsoftestingnecessarytoensurereproducibilityoftestresults.Thisstandardstatesa)thecharacteristicsofcircuit-breakers;b)theconditionswithwhichcircuit-breakersshallcomply,withreferenceto:1)theiroperationandbehaviourinnormalservice;2)theiroperationandbehaviourincaseofoverload;3)theiroperationandbehaviourincaseofshort-circuitsuptotheirratedshort-circuitcapacity;4)theirdielectricproperties;c)thetestsintendedforconfirmingthattheseconditionshavebeenmetandthemethodstobeadoptedforthetests;d)thedatatobemarkedonthedevices;e)thetestsequencestobecarriedoutandthenumberofsamplestobesubmittedforcertificationpurposes(seeannexC);f)theco-ordinationundershort-circuitconditionswithanothershort-circuitprotectivedevice(SCPD)associatedinthesamecircuit(seeannexD);g)theroutineteststobecarriedoutoneachcircuit-breakertorevealunacceptablevariationsinmaterialormanufacture,likelytoaffectsafety(seeannexI).
【中国标准分类号】:K31
【国际标准分类号】:29_120_50
【页数】:229P;A4
【正文语种】:英语