JIS X6242-1998 80mm数字化视频光盘(DVD).只读光盘
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来源:标准资料网
【英文标准名称】:80mmDVD--Readonlydisk
【原文标准名称】:80mm数字化视频光盘(DVD).只读光盘
【标准号】:JISX6242-1998
【标准状态】:作废
【国别】:日本
【发布日期】:1998-01-20
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:TechnicalCommitteeonInformationTechnology
【标准类型】:()
【标准水平】:()
【中文主题词】:光盘;信息交流;只读存储器;数据布置
【英文主题词】:informationexchange;read-onlystorage;opticaldisks;datalayout;dataprocessing
【摘要】:
【中国标准分类号】:L64
【国际标准分类号】:35_220_30
【页数】:66P;A4
【正文语种】:日语
【英文标准名称】:Electricalrelays-Part22-4:Electricaldisturbancetestsformeasuringrelaysandprotectionequipment;Electricalfasttransient/burstimmunitytest(IEC60255-22-4:2002);GermanversionEN60255-22-4:2002
【原文标准名称】:电气继电器.第22-4部分:量度继电器和保护装置的电气干扰试验.快速/瞬变干扰试验
【标准号】:EN60255-22-4-2002
【标准状态】:现行
【国别】:
【发布日期】:2003-03
【实施或试行日期】:2003-03-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:连续干扰;定义;电气保护设备;试验;干扰抑制;保护继电器;测试;继电器;合格试验;电气工程;保护设备;量值继电器;瞬时的;测量继电器;影响量
【英文主题词】:
【摘要】:电气继电器.第22-4部分:量度继电器和保护装置的电气干扰试验.快速/瞬变干扰试验
【中国标准分类号】:K31
【国际标准分类号】:29_120_70
【页数】:14P;A4
【正文语种】:英语
【英文标准名称】:Fansforgeneralpurposes-Specificationsforbalancingandvibration
【原文标准名称】:通用风扇.平衡和振动规范
【标准号】:BS848-7-2003
【标准状态】:现行
【国别】:英国
【发布日期】:2003-05-14
【实施或试行日期】:2003-05-14
【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】:平衡;定义;定义(术语);影响;通风设备;振动;振动效果;振动强度
【英文主题词】:Balancing;Definition;Definitions;Impacts;Ventilators;Vibration;Vibrationeffects;Vibrationintensity
【摘要】:ThisInternationalStandardgivesspecificationsforvibrationandbalancelimitsoffansforallapplicationsexceptthosedesignedsolelyforaircirculation,forexample,ceilingfansandtablefans.However,itislimitedtofansofalltypesinstalledwithapoweroflessthan300kWortoacommerciallyavailablestandardelectricmotorwithamaximumpowerof355kW(followinganR20series).Forfansofgreaterpowerthanthis,theapplicablelimitsarethosegiveninISO10816-3.Wherethefansinaninstallationhavevaryingpowersbothaboveandbelow300kW,andhavebeenthesubjectofasinglecontract,thenthemanufacturerandpurchasershallagreeontheappropriatestandardtobeused.Thisshouldnormallybebasedonthemajorityofunits.VibrationdatamayberequiredforavarietyofpurposesasdetailedinClause5.TheInternationalStandardrecognizesthatvibrationalmeasurementsmayberecordedasvelocity,accelerationordisplacementeitherinabsoluteunitsorindecibelsaboveagivenreferencelevel.Themagnitudeofvibrationmeasurementsmaybeaffectedbyassemblypracticesatbalancingmachines(seeAnnexB).Thepreferredparameteris,however,thevelocity,inmillimeterspersecond(mm/s).Astheconventionsvaryindifferentpartsoftheworld,bothr.m.s.(rootmeansquare)andpeak-to-peakorpeakvaluesaregiven.Itshouldalsoberememberedthatafananditspartsmaybeconsideredasaspring-masssystem.Anunderstandingofthisfacthelpstoresolvemostvibrationalproblems(seeAnnexD).Accounthasalsobeentakenofthefactthatfactorytestsareusuallyconductedwiththefanunconnectedtoaductingsystem,suchthatitsaerodynamicdutymaybeconsiderablydifferentfromthatduringnormaloperation.Itmayalsobesupportedontemporaryfoundationsofdifferentmassandstiffnesstothoseusedinsitu.Accordingly,suchtestsarespecifiedwithvibrationmeasured“filter-in”.Insitutestsarespecified“filter-out”andassuchrepresentameasureofoverallvibrationseverity.ThisInternationalStandardcoversfanequipmentwithrigidrotors,generallyfoundin:commercialheating,ventilatingandairconditioning,industrialprocesses,mine/tunnelventilationandpower-generationapplications.Otherapplicationsarenotspecificallyexcluded.Excludedareinstallationswhichinvolvesevereforces,impactsorextremetemperatures.AnyorallportionsofthisInternationalStandard,ormodificationsthereof,aresubjecttoagreementbetweenthepartiesconcerned.Fan-equipmentfoundationsandinstallationpracticesarebeyondthescopeofthisInternationalStandard.Foundationdesignandfaninstallationarenotnormallytheresponsibilitiesofthefanmanufacturer.Itisfullyexpectedthatthefoundationsuponwhichthefanismountedwillprovidethesupportandstabilitynecessarytomeetthevibrationcriteriaofthefanasitisdeliveredfromthefactory.Otherfactors,suchasimpellercleanliness,aerodynamicconditions,backgroundvibration,operationatspeedsotherthanthoseagreedupon,andmaintenanceofthefan,affectthefan-vibrationlevelsbutarebeyondthescopeofthisInternationalStandard.ThisInternationalStandardisintendedtocoveronlythebalanceorvibrationofthefananddoesnottakeintoaccounttheeffectoffanvibrationonpersonnel,equipmentorprocesses.
【中国标准分类号】:J72
【国际标准分类号】:17_160;23_120
【页数】:48P.;A4
【正文语种】:英语
