标准资料网-标准资料免费资源平台

【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


【英文标准名称】:StandardSpecificationforAsbestos-CementConduit
【原文标准名称】:石棉水泥管道的标准规范
【标准号】:ASTMC875-1998(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1998
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C17.03
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:asbestos;asbestos-cement;conduit;specification;Asbestos-cement--specifications;Asbestos-cementpipe--specifications;Communications--specifications;Conduits--specifications;Electricalpowersystems--specifications;Flexuraltesting--asbestos-ce
【摘要】:p>Thisguideisnotintendedtosupplydesigninformationnortoassumetheresponsibilityoftheengineerinestablishingprocedurestoattainsatisfactoryperformancebestsuitedtoindividualjobconditions.Areviewofthisguideisrecommendedpriortosupplementingit,asappropriate,withtheconditionsandrequirementsoftheownerandengineer.1.1Thisspecificationcoversasbestos-cementconduitforuseinelectric-powersystemsandcommunicationsystems.Theserviceisforbothundergroundandexposedconditions.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedinparenthesesareprovidedforinformationonly.1.3Warningx2014;Breathingofasbestosdustishazardous.Asbestosandasbestosproductspresentdemonstratedhealthrisksforusersandforthosewithwhomtheycomeintocontact.Inadditiontootherprecautions,whenworkingwithasbestos-cementproducts,minimizethedustthatresults.Forinformationonthesafeuseofchrysoltileasbestos,refertox201C;SafeUseofChrysotileAsbestos:AManualonPreventiveandControlMeasures.x201D;1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.See1.3forspecifichazardwarning.
【中国标准分类号】:Q14
【国际标准分类号】:23_040_50
【页数】:4P.;A4
【正文语种】:英语