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IEC 61786-1998 关于人体暴露的低频电场和磁场的测量仪表的特殊要求和测量指南

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【英文标准名称】:Measurementoflow-frequencymagneticandelectricfieldswithregardtoexposureofhumanbeings-Specialrequirementsforinstrumentsandguidanceformeasurements
【原文标准名称】:关于人体暴露的低频电场和磁场的测量仪表的特殊要求和测量指南
【标准号】:IEC61786-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC85
【标准类型】:()
【标准水平】:()
【中文主题词】:电学测量;测量仪器;电磁学;测量设备;电学测量仪表;低频;测量技术;规范(验收);磁场;电气工程;电场
【英文主题词】:
【摘要】:ThisInternationalStandardprovidesguidanceformeasuringthesteady-stateroot-mean-square(r.m.s.)valuesofquasi-staticmagneticandelectricfieldswhichhaveafrequencycontentintherange15Hzto9kHz.Sourcesofquasi-staticfieldsincludedevicesthatoperateatpowerfrequenciesandproducepowerfrequencyandpowerfrequencyharmonicfields,aswellasdevicesthatproducefieldsindependentofthepowerfrequency.Themagnituderangescoveredbythisstandardare100nTto100mTand1V/mto50kV/mformagneticfieldsandelectricfields,respectively.Whenmeasurementsoutsidethisrangeareperformed,mostoftheprovisionsofthisstandardwillstillapply,butcertainprovisionssuchasspecifieduncertaintyandcalibrationproceduremayneedmodification.Specifically,thisstandard-definesterminology;-identifiesrequisitefieldmeterspecifications;-indicatesmethodsofcalibration;-definesrequirementsoninstrumentationuncertainty;-describesgeneralcharacteristicsoffields;-surveysoperationalprinciplesofinstrumentation;-describesmeasurementmethodsthatachievedefinedgoalspertainingtohumanexposure.Sourcesofuncertaintyduringcalibrationandmeasurementsarealsoidentifiedandguidanceisprovidedonhowtheyshouldbecombinedtodeterminetotalmeasurementuncertainty.Inregardtoelectricfieldmeasurements,thisstandardconsidersonlythemeasurementoftheunperturbedelectricfieldstrengthatapointinspace(i.e.theelectricfieldpriortotheintroductionofthefieldmeterandoperator)oronconductingsurfaces.NOTE-Someseparationbetweenthenormativemeasurementrequirementsinclauses5and6andtheexamplemeasurementprotocolsandguidanceformeasurementsinannexesDandEisunavoidablebecauseofformatrequirements.
【中国标准分类号】:K04
【国际标准分类号】:17_220_20
【页数】:177P;A4
【正文语种】:英语


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【英文标准名称】:Short-circuitcurrentsinthree-phasea.c.systems-Part4:Examplesforthecalculationofshort-circuitcurrents
【原文标准名称】:三相交流系统中的短路电流第4部分:短路电流计算举例
【标准号】:IEC/TR60909-4-2000
【标准状态】:现行
【国别】:国际
【发布日期】:2000-07
【实施或试行日期】:
【发布单位】:国际电工委员会(IEC)
【起草单位】:IEC/TC73
【标准类型】:()
【标准水平】:()
【中文主题词】:效应;电气工程;短路电流;三相电流;电流;交流电流;数学计算
【英文主题词】:
【摘要】:ThispartofIEC60909isatechnicalreportintendedtogivehelpfortheapplicationofIEC60909-0forthecalculationofshort-circuitcurrentsin50Hzor60Hzthree-phasea.c.systems.Thistechnicalreportdoesnotincludeadditionalrequirementsbutgivessupportforthemodellingofelectricalequipmentinthepositive-sequence,thenegative-sequenceandthezero-sequencesystem(clause2)andthepracticalexecutionofcalculationsinalow-voltagesystem(clause3),amedium-voltagesystemwithasynchronousmotors(clause4)andapower-stationunitwithitsauxiliarynetworkfeedingalargenumberofmedium-voltageasynchronousmotorsandlow-voltagemotorgroups(clause5).Thethreeexamplesgiveninclauses3,4and5aresimilartothosegiveninIEC60909(1988)buttheyarerevisedinaccordancewithIEC60909-0,whichreplacesit.Asubclauseisaddedtotheexampleinclause3togiveacomparisonbetweentheresultsfoundwiththeapplicationoftheequivalentvoltagesourceattheshort-circuitlocationfollowingtheproceduregiveninIEC60909-0ontheonehand,andresultsfoundwiththesuperpositionmethodontheotherhand,takingintoaccountdifferentload-flowconditionsbeforetheshortcircuit.Clause6ofthistechnicalreportgivesthecircuitdiagramandthedataofatestnetworkandtheresultsforacalculationcarriedoutinaccordancewithIEC60909-0,toofferthepossibilityforacomparisonbetweentheresultsfoundwithadigitalprogramforthecalculationofshort-circuitcurrentsandthegivenresultsforIk",ip,Ib,Ik,Ik1"andip1inahigh-voltagenetworkwithpower-stationunits,generators,asynchronousmotorsandlinesinfourdifferentvoltagelevels380kV,110kV,30kVand10kV.
【中国标准分类号】:K04
【国际标准分类号】:17_220_01
【页数】:131P;A4
【正文语种】:英语


【英文标准名称】:Industrialtrucks-Verificationofstability-Bidirectionalandmultidirectionaltrucks
【原文标准名称】:工业车辆.稳定性的验证.双向和多向卡车
【标准号】:BSISO22915-7-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2009-11-30
【实施或试行日期】:2009-11-30
【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】:移动方向;装卸设备;工业用货车;提升拾取器;负荷;物料搬运设备;平台;稳定性;稳定性试验;测试;有效荷载
【英文主题词】:Directionofmovement;Handlingequipment;Industrialtrucks;Liftingtackle;Loading;Materialshandlingequipment;Platforms;Stability;Stabilitytests;Testing;Usefulload
【摘要】:
【中国标准分类号】:T59
【国际标准分类号】:
【页数】:26P;A4
【正文语种】:英语