ISO 739-1976 工业用碳酸钠试样的制备和贮存
作者:标准资料网 时间:2024-05-29 22:19:38 浏览:9864
来源:标准资料网
【英文标准名称】:Sodiumcarbonateforindustrialuse-Preparationandstorageoftestsamples
【原文标准名称】:工业用碳酸钠试样的制备和贮存
【标准号】:ISO739-1976
【标准状态】:现行
【国别】:国际
【发布日期】:
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:47
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ThisInternationalStandardspecifiestheprocedureforthepreparationandstorageoftestsamplesofsodiumcarbonateforindustrialuse.
【中国标准分类号】:G12
【国际标准分类号】:
【页数】:4P.;A4
【正文语种】:其他
【英文标准名称】:Insulationcoordinationforequipmentwithinlow-voltagesystems-Considerationofhigh-frequencyvoltagestress
【原文标准名称】:低压系统内设备的绝缘配合.高频电压应力的考虑
【标准号】:BSEN60664-4-2006
【标准状态】:现行
【国别】:英国
【发布日期】:2006-04-28
【实施或试行日期】:2006-04-28
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:ThispartofIEC60664dealswithbasic,supplementaryandreinforcedinsulationsubjectedtohigh-frequencyvoltagestresswithinlow-voltageequipment.Thedimensioningvaluesdirectlyapplyforbasicinsulation;forreinforcedinsulationadditionalrequirementsapplyaccordingtoPart1.Itisapplicableforthedimensioningofclearances,creepagedistancesandsolidinsulationstressedbyanytypeofperiodicvoltageswithafundamentalfrequencyabove30kHzandupto10MHz.ThispartofIEC60664canonlybeusedtogetherwithIEC60664-1orwithIEC60664-5(inthisstandardcalledPart1orPart5).ByusingPart1orPart5togetherwiththispartthefrequencylimitofPart1orPart5isextendedtofrequencieshigherthan30kHz.ThispartalsoappliestoPart3forfrequenciesgreaterthan30kHzandprotectionoftype1.Fortype2protectionthisquestionisunderconsideration.NOTE1Dimensioningvaluesforfrequenciesabove10MHzareunderconsideration.NOTE2Thisstandarddoesnotconsiderthehigh-frequencyemissiontothemains.Innormaluseofequipment,itisassumedthattheinterferenceofhigh-frequencyvoltagesemittedtothemainsisnegligiblewithrespecttoinsulationstress.Thereforeitisnotnecessarytotakeitintoaccount.Itappliestoequipmentforuseupto2000mabovesealevelhavingaratedvoltageuptoa.c.1000V.Itspecifiestherequirementsforclearances,creepagedistancesandsolidinsulationforequipmentbasedupontheirperformancecriteria.ltincludesmethodsofelectrictestingwithrespecttoinsulationcoordination.Theminimumclearancesspecifiedinthispartdonotapplywhereionizedgasesoccur.Specialrequirementsforsuchsituationsmaybespecifiedatthediscretionoftherelevanttechnicalcommittee.Thispartdoesnotdealwithdistances?throughliquidinsulation,?throughgasesotherthanair,?throughcompressedair.NOTE3Highervoltagesmayexistininternalcircuitsoftheequipment.NOTE4Requirementsforaltitudesexceeding2000mcanbederivedfromTableA.2ofAnnexAofPart1.Theobjectofthisstandardistoguidetechnicalcommitteesresponsiblefordifferentequipmentinordertorationalisetheirrequirementssothatinsulationcoordinationisachievedwhenspecifyingclearancesinair,creepagedistancesandsolidinsulationforequipment.
【中国标准分类号】:K30
【国际标准分类号】:29_080_30
【页数】:72P;A4
【正文语种】:英语
【英文标准名称】:Bitumenandbituminousbinders.Determinationofeffluxtimebytheeffluxviscometer.Cut-backandfluxedbituminousbinders
【原文标准名称】:沥青和沥青粘合剂.用流出粘度计测定沥青乳液流出时间.稀释沥青或助溶沥青粘合剂
【标准号】:BSEN12846-2-2011
【标准状态】:现行
【国别】:英国
【发布日期】:2011-05-31
【实施或试行日期】:2011-05-31
【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】:
【英文主题词】:Bindingagents;Bitumens;Bituminous;Blend;Construction;Cut-backbitumens;Definitions;Determination;Dimensions;Flowtime;Materialstesting;Measurement;Measuringtechniques;Petroleumproducts;Samplingmethods;Testreports;Testing;Testingdevices;Viscometers;Viscosimetry
【摘要】:ThisEuropeanStandardspecifiesamethodforthedeterminationoftheeffluxtimeat25°Cofpetroleumcutbackandfluxedbituminousbindersinsecondsusinganeffluxviscometer.Alternativetesttemperaturesare40°C,50°Cand60°C.WARNING—TheuseofthisEuropeanStandardmayinvolvehazardousmaterials,operationsandequipment.ThisEuropeanStandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.ItistheresponsibilityoftheuserofthisEuropeanStandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q27
【国际标准分类号】:91_100_50
【页数】:18P.;A4
【正文语种】:英语
