BS 7454-1991 考虑非绝热效应因素的允许热短路电流的计算方法
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【英文标准名称】:Methodforcalculationofthermallypermissibleshort-circuitcurrents,takingintoaccountnon-adiabaticheatingeffects
【原文标准名称】:考虑非绝热效应因素的允许热短路电流的计算方法
【标准号】:BS7454-1991
【标准状态】:作废
【国别】:英国
【发布日期】:1991-04-30
【实施或试行日期】:1991-04-30
【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】:电缆护套;电线;短路电流;数学计算;导电体;绝缘子;温度;电绝缘材料;电流;故障电流;绝缘电缆
【英文主题词】:Adiabatic;Electriccables;Electriccurrent;Electricalengineering;Faultcurrents;Heating;Mathematicalcalculations;Non-adiabatic;Shortcircuits;Short-circuitcurrents;Symbols;Thermal
【摘要】:MethodforCalculationofthermallypermissibleshort-circuitcurrents,takingintoaccountnon-adiabaticheatingeffectsCommitteesresponsibleNationalforewordMethodIntroduction1Listofsymbols2Permissibleshort-circuitcurrent3Calculationofadiabaticshort-circuitcurrent4Calculationofshort-circuittemperature5Calculationofnon-adiabaticfactorforconductorsandspacedwirescreens6Calculationofnon-adiabaticfactorforsheaths,screensandwiresAppendixAExplanationofrecommendedmethodsfortakingintoaccountnon-adiabaticheatingeffectwhencalculatingpermissibleshort-circuitcurrentsTables1Untitled2Thermalconstantsofmaterials3ConstantsforuseinthesimplifiedformulaforconductorsandspacedwirescreensFigure1Non-adiabaticfactor(e)forsheaths,screensandarmour
【中国标准分类号】:A42
【国际标准分类号】:29_020
【页数】:16P.;A4
【正文语种】:英语
【英文标准名称】:Metallicandotherinorganiccoatings-Pretreatmentofironorsteeltoreducetheriskofhydrogenembrittlement
【原文标准名称】:金属和其他无机覆盖层钢铁为减少氢脆危险的预处理
【标准号】:ISO9587-1999
【标准状态】:作废
【国别】:国际
【发布日期】:1999-10
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC107
【标准类型】:()
【标准水平】:()
【中文主题词】:氢脆;温湿度预调节;覆层;热处理;表面处理;钢;金属覆层;转化膜;铁
【英文主题词】:Coatings;Conversioncoating;Heattreatment;Hydrogenembrittlement;Iron;Metalcoatings;Preconditioning;Steels;Surfacetreatment
【摘要】:ThisInternationalStandardestablishesstressreliefrequirementsforhighstrengthsteelsinordertoreducetheirsusceptibilityordegreeofsusceptibilitytohydrogenembrittlementinsubsequentpretreatment,electroplating,autocatalyticplating,chemicalconversionandphosphatingprocesses.ThisInternationalStandardisapplicabletosteelsthepropertiesofwhicharenotadverselyaffectedbyheattreatmentat190℃to230℃orhigher(see6.2).TheheattreatmentproceduresestablishedinthisInternationalStandardhavebeenshowntobeeffectiveinreducingthesusceptibilityofsteelhavingtensilestrengthsequaltoorgreaterthan1000MPaandthathavebeenmachined,ground,cold-formedorcold-straightenedsubsequenttoheattreatment.Thisheat-treatmentprocedureisusedpriortoanyoperationcapableofhydrogenchargingthepartssuchasthecleaningprocedurespriortoelectroplating,autocatalyticplatingandotherchemicalcoatingoperations.ThisInternationalStandarddoesnotapplytofasteners.
【中国标准分类号】:A29
【国际标准分类号】:25_220_40;25_220_99
【页数】:3P;A4
【正文语种】:英语
【英文标准名称】:Recommandedtestmethodsfordeterminingtherelativeresistanceofinsulatingmaterialstobreakdownbysurfacedischarges.
【原文标准名称】:用表面放电法测定绝缘材料相对的耐击穿性推荐试验方法
【标准号】:NFC26-240-1993
【标准状态】:现行
【国别】:法国
【发布日期】:1993-01-01
【实施或试行日期】:1993-01-05
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Circuits;Determination;Discharge;Electricdischarges;Electricstrength;Electricalengineering;Electricalinsulatingmaterials;Electrodes;Fatiguetests;Highvoltage;Insulatingmaterials;Long-timebehaviour;Materials;Resistance;Surfacedischarges;Testing;Testingconditions;Voltage
【摘要】:
【中国标准分类号】:K15
【国际标准分类号】:29_035_01
【页数】:15P.;A4
【正文语种】:其他