【英文标准名称】:StandardSpecificationforPoly(MethylMethacrylate)AcrylicPlasticSheet
【原文标准名称】:聚甲基丙烯酸甲酯丙烯酸塑料片标准规范
【标准号】:ASTMD4802-1994
【标准状态】:作废
【国别】:美国
【发布日期】:1994
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:聚甲基丙烯酸甲酯;箔
【英文主题词】:polymethylmethacrylate;polymethylmethacrylate;foil
【摘要】:
【中国标准分类号】:G33
【国际标准分类号】:83_140_10
【页数】:6P;A4
【正文语种】:英语


【英文标准名称】:Guidetothespecificationanddesignevaluationofa.c.filtersforHVDCsystems
【原文标准名称】:HVDC系统用交流过滤器的规范和设计评价指南
【标准号】:BSDDIECPAS62001-2004
【标准状态】:作废
【国别】:英国
【发布日期】:2004-09-07
【实施或试行日期】:2004-09-07
【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】:可靠度;规范(验收);电力传输;设备;电子工程;电力系统;电气工程;工作性能;电信;交流过滤器;高电压;过滤器;消费者与供货者的关系;交流电流;载(波)频(率);直流电流;电力电子学;三相电流;供应商;传输系统;能量传输;直流电传输;高压线路;谐波;无线电干扰;功率损耗
【英文主题词】:Alternatingcurrent;Alternatingcurrentfilters;Carrierfrequency;Consumer-supplierrelations;Directcurrent;Direct-currentpowertransmission;Electricpowersystems;Electricpowertransmission;Electricalengineering;Electronicengineering;Energytransmission;Equipment;Filters;Harmonics;Highvoltage;High-voltagelines;Performanceinservice;Powerelectronics;Powerlosses;Providers;Radiodisturbances;Reliability;Specification(approval);Suppliers;Telecommunications;Three-phasecurrent;Transmissionsystems
【摘要】:ScopeofstudiesDependingontheboundariesofresponsibilitydiscussedabove,somesystemstudiesmayrequiretobeconductedbytheCustomerpriortoissuingtheTechnicalSpecification,ormaybetheresponsibilityoftheBidderandlatertheContractor.Thosesuchstudiesrelatedtothea.c.filterswouldnormallycover:·a.c.systemreactivepowerrequirements·a.c.systemimpedancemeasurementsorcalculations·pre-existingharmoniclevels·inductiveco-ordinationfortelecommunicationlinesnearaffecteda.c.linesTheextentofsystemstudiesrequiredtobeconductedbytheBidderandtheContractorshouldbemadeclearintheTechnicalSpecification.Aminimumsetofstudieswillalwaysberequiredtoensurethatthefiltersperformadequatelyandthattheywithstandalldefinedelectricalandenvironmentalconditions.Theseessentialstudieswouldnormallycomprise:a)reactivepowersupplyandcontrolb)low-orderresonancewitha.c.systemc)a.c.filterperformanced)a.c.filtersteady-stateratinge)a.c.filtertransientrating,overvoltageandinsulationco-ordinationf)a.c.filterlossesg)a.c.filterprotectionh)a.c.filtercircuitbreakerdutiesi)a.c.filterdischargerequirementsj)thosepartsofthecontrolanddynamicperformancestudieswhichareaffectedbythea.c.filters,andanalysetheintegratedoperationofthea.c.andHVDCsystemsk)thosepartsoftheaudiblenoisestudywhichareaffectedbythea.c.filtersl)thosepartsoftheRAM(reliability,availabilityandmaintenance)studywhichareaffectedbythea.c.filtersHowever,furtherperformanceandratingstudiesmaybeofinteresttoassisttheplanningofeconomicandflexibleoperation,andtodefinerecommendedproceduresintheeventofoutages,maintenanceorunusualoperationalsituations.Suchstudiesmightcover,forexample,performanceandratingunderoutagecontingenciesnotrequiredbythespecification,orwithwiderlimitsofreactivepowerinterchangethanspecified.Thesesituationsmightbeofconsiderableinteresttooperationplanners,andhaveaneconomicvalue.ThepossibleneedforsuchadditionalstudiesshouldbeconsideredbytheCustomerandifdesired,includedinthescopeofstudiesrequiredintheTechnicalSpecification.Oftheessentialdesignstudies,somewouldnormallybeconductedinfullbytheBidderaspartofthetenderingprocess(atleasta,c,d,andjoftheabovelist).Othersmightbeomittedorminimisedduringthetenderingstage,andestimatesmadebasedontheBidder’spreviousexperience.Duringthedetaileddesignstage,allessentialstudieswouldbeconductedinfullbytheContractor.ScopeofsupplyTheTechnicalSpecificationshouldmakeclearthescopeofsupplywithregardtoa.c.filteringaswithallaspectsoftheHVDCscheme.Inadditiontosupplyofthemaina.c.filtercomponents,theresponsibilityforsupplyofthefollowingshouldbedefined:·sitepreparation·civilandmechanicalstructures·earthing·fencing·interfacewitha.c.switchyard·control,measuring,monitoringandprotection·switchingequipment·cabling·spareparts·specialtestequipmentrequiredforcommissioningandmaintenance·erection,commissioningandtesting·in-serviceperformancemeasurementsAnyrequirementforguaranteesconcerning,forexamplecapacitorfailurerates,measuredfilterlosses,performance,etc.,shouldalsobeclearlystated.
【中国标准分类号】:L18
【国际标准分类号】:31_160
【页数】:244P.;A4
【正文语种】:英语