标准资料网-标准资料免费资源平台

【英文标准名称】:Railwayapplications-Communication,signallingandprocessingsystems-Safetyrelatedelectronicsystemsforsignalling
【原文标准名称】:铁路设施.通信、信号传输和处理系统.信号传输用与安全性相关的电子系统
【标准号】:IEC62425-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-09
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC9
【标准类型】:()
【标准水平】:()
【中文主题词】:通信系统;数据总线;定义;电气工程;电子工程;电子系统;信息交换;铁路设施;铁路工程;铁道车辆;铁路;安全;安全工程;安全要求;安全管理;信号装置;信号传输;规范(验收)
【英文主题词】:Communicationsystems;Databus;Definition;Definitions;Electricalengineering;Electronicengineering;Electronicsystems;Informationinterchange;Railwayapplications;Railwayengineering;Railwayvehicles;Railways;Safety;Safetyengineering;Safetyrequirements;Securitymanagement;Signaldevices;Signaltransmission;Specification(approval)
【摘要】:ThisInternationalStandardisapplicabletosafety—relatedelectronicsystems(includingsub-systemsandequipment)forrailwaysignallingapplications．Thescopeofthisstandard,anditsrelationshipwithotherIECstandards,areshowninFigure1．Thisstandardisintendedtoapplytoallsafety-relatedrailwaysignallingsystems/sub-system/equipment．However,thehazardanalysisandriskassessmentprocessesdefinedinIEC62278andthisstandardarenecessaryforallrailwaysignallingsystems/sub—systems,equipment,inordertoidentifyanysafetyrequirements．Ifanalysisrevealsthatnosafetyrequirementsexist(i.e.:thatthesituationisnon-safety-related),andprovidedtheconclusionisnotrevisedasaconsequenceoflaterchanges,thissafetystandardceasestobeapplicable．Thisstandardappliestothespecification,design,construction,installation,acceptance,operation,maintenanceandmodification/extensionphasesofcompletesignallingsystems,andalsotoindividualsub-systemsandequipmentwithinthecompletesystem．AnnexCincludesproceduresrelatingtoelectronichardwarecomponents．Thisstandardappliestogenericsub-systemsandequipment(bothapplication-independentandthoseintendedforaparticularclassofapplication),andalsotosystems/sub-systems/equipmentforspecificapplications．Thisstandardisnotapplicabletoexistingsystems/sub-systems,equipment(i．e．thosewhichhadalreadybeenacceptedpriortolhecreationofthisstandard)．However,asfarasreasonablypracticable,thisstandardshouldbeappliedtomodificationsandextensionstoexistingsystems,sub-systemsandequipment．Thisstandardisprimarilyapplicabletosystems/sub—systems,equipmentwhichhavebeenspecificallydesignedandmanufacturedforrailwaysignallingapplications．Itshouldalsobeapplied．asfarasreasonablypracticable,togeneral-purposeorindustrialequipment(e．g.:powersupplies,modems,etc．),whichisprocuredforuseaspartofasafety—relatedsignallingsystem．Asaminimum,evidenceshallbeprovidedinsuchcasestodemonstrate—eitherthattheequipmentisnotreliedonforsafety,一orIhattheequipmentcanbereliedonforthosefunctionswhichrelatetosafety．Thisstandardisapplicabletothefunctionalsafetyofrailwaysignallingsystems．Itisnotintendedtodealwiththeoccupationalhealthandsafetyofpersonnel；thissubjectiscoveredbyotherstandards．
【中国标准分类号】:S70
【国际标准分类号】:45_060;93_100
【页数】:197P.;A4
【正文语种】:


【英文标准名称】:Laboratoryresistors-Laboratorya.c.resistors
【原文标准名称】:实验室用电阻.实验室用交流电阻
【标准号】:BSEN60477-2-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1980-10-31
【实施或试行日期】:1980-10-31
【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】:交流电流;交流电流电阻;连接线;定义;定义(术语);直流电流;电气工程;电阻;电子工程;频率;效应;初始的;实验室;交流实验电阻器;实验室器皿;极限(数学);低电压;作标记;测量仪器;多倍;标准使用;精密电阻器;特性;额定值;电阻器;半导体;规范(验收);符号
【英文主题词】:Alternatingcurrent;Alternating-currentresistance;Connectionlines;Definition;Definitions;Directcurrent;Electricalengineering;Electricalresistance;Electronicengineering;Frequencies;Influenceeffects;Inscription;Laboratories;Laboratorya.c.resistors;Laboratoryware;Limits(mathematics);Lowvoltage;Marking;Measuringinstruments;Multiple;Nominaluse;Precisionresistors;Properties;Ratings;Resistors;Semiconductors;Specification(approval);Symbols
【摘要】:Scope,definitions,resistorcharacterization,generalrequirements,permissiblevariations,electricalandmechanicalrequirements,markingsandsymbols.Appendicesgiveexamplesofmarkings,generalconsiderationsandequivalentcircuits.
【中国标准分类号】:L13
【国际标准分类号】:17_220_20
【页数】:20P.;A4
【正文语种】:英语