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电气设备常用基本文字符号设备、装置和元器件种类举例基本文字符号IEC中文名称英文名称单字母双字母组件部件分离元件放大器AmplifierusingdiscreteA=Components激光器Laser调节器Regulator本表其他地方未提及的组件、部件电桥BridgeAB晶体管放大器TransistoramplifierAD=集成电路放大器IntegratedcircuitamplifierAJ=磁放大器MagneticamplifierAM=电子管放大器ValveamplifierAV=印制电路板PrintedcircuitboardAP=抽屉柜DrawerAT=支架盘RackAR=非电量到电量变换器或电量到非电量变换器热电传感器ThermoelectricsensorB=热电池Thermo--cell光电池Photoelectriccell测功计Dynamometer晶体换能器Crystaltransducer送话器Microphone拾音器Pickup扬声器Loudspeaker耳机Earphone自整角机Synchro旋转变压器Resolver模拟和多级数字变换器或传感器（用作指示和测量）Analogueandmultiple-stepdigitalTransducersorsensors(asusedindicatingmeasuringpurposes)压力变换器PressuretransducerBP=位置变换器PositiontransducerBQ=旋转变换器（测速发电机）Rotationtransducer(tachogenerator)BR=温度变换器TemperaturetransducerBT=速度变换器VelocitytransducerBV=电容器电容器CapacitorC=设备、装置和元气件种类举例基本文字符号IEC中文名称英文名称单字母双字母二进指元件延迟器件存储器件数字集成电路和器件:Digitalintegratedcircuitsanddevices:D=延迟线Delayline双稳态元件Bistableelement单稳态元件Monostableelement磁芯存储器Corestorage寄存器Register磁带记录机Magnetictaperecorder盘式记录机Diskrecorder其他元气件本表其他地方未规定的器件E=发热器件HeatingdeviceEH=照明灯LampforlightingEL=空气调节器VentilatorEV=保护器件过电压放电器件避雷器OvervoltagedischargedeviceArresterF=具有瞬时动作的限流保护器件CurrentthresholdprotectivedevicewithInstantaneousactionFA=具有延时动作的限流保护器件CurrentthresholdprotectivedevicewithTime-lagactionFR=具有延时和瞬时动作的限流保护器件CurrentthresholdprotectivedevicewithInstantaneousandtime-lagactionFS=熔断器FuseFU=限压保护器件VoltagethresholdprotectivedeviceFV=发生器发电机电源旋转发电机振荡器RotatinggeneratorOscillatorG=发生器GeneratorGS=同步发电机Synchronousgenerator异步发电机AsynchronousgeneratorGA发生器发蓄电池BatteryGB=电机电源旋转式或固定式变频机RotatingorstaticfrequencyconverterGF=设备、装置和元器件种类举例基本文字符号IEC中文名称英文名称单字母双字母信号器件H=声响指示器AcousticalindicatorHA=光指示器OpticalindicatorHL=指示灯IndicatorlampHL=继电器接触器K=瞬时接触继电器InstantaneouscontactorrelayKA=瞬时有或无继电器InstantaneousallornothingRellayKA=交流继电器AlternatingrealyKA闭锁接触继电器（机械闭锁或永磁铁式有或无继电器)Latchingcontactorrealy(all-or-nothingrelaywithmechanicallatchorpermanentmagnet)KL=双稳态继电器BistablerelayKL=接触器ContactorKM=极化继电器PolarizedrelayKP=簧片继电器ReedrelayKR=延时有或无继电器Time-delayall-or-nothingrelayKT=逆流继电器ReversecurrentrelayKR=电感器电抗器感应线圈线路陷波器电抗器（并联和串联）InductioncoilLinetrapReactors(shuntandseries)L=电动机电动机MotorM=同步电动机SynchronousmotorMS可做发电机或电动机的电机MachinecapableofuseasageneratorormotorMG力矩电动机TorquemotorMT模拟元件运算放大器OperationalamplifierN=混合模拟/数字器件Hybridanalogue/digitaldevice设备、装置和元器件种类举例基本文字符号IEC中文名称英文名称单字母双字母测量设备实验设备指示器件IndicatingdevicesP=记录器件Recordingdevices积算测量器件Integratingmeasuringdevices信号发生器Singnalgenerator电流表AmmeterPA=（脉冲）计数器(Pulse)CounterPC=电度表WatthourmeterPJ=记录仪表RecordinginstrumentPS=时钟、操作时间表Clock,OperatingtimemeterPT=电压表VoltmeterPV=电力电路Q=断路器Circuit-breakerQF=的开关器件电动机保护开关MotorprotectionswitchQM=隔离开关Disconnector(isolator)QS=电阻器电阻器ResistorR=变阻器Rheostat电位器PotentiometerRP=测量分路表MeasuringshuntRS=热敏电阻器ResistorwithinherentvariabilitydependentonthetemperatureRT=压敏电阻器ResistorwithinherentvariabilitydependentonthevoltageRV=控制、记忆、信号电路的开关器件选择拨号接触器连接级DialcontactConnectingstageS=控制开关ControlswitchSA=选择开关SelectorswitchSA=按纽开关Push-buttonSB=机电式有或无传感器（单级数字传感器）All-or-nothingsensorsofmechanicalandelectronicnature(one-stepdigitalsensors)液体标高传感器LiquidlevelsensorSL=压力传感器PressuresensorSP=位置传感器（包括接近传感器）Positionsensor(includingproximity-sensor)SQ=转数传感器RotationsensorSR=温度传感器TemperaturesensorST=变压器T=电流互感器CurrenttransformerTA=控制电路电源用变压器TransformerforcontrolcircuitsupplyTC=电力变压器PowertransformerTM=磁稳压器MagmeticstabilizerTS=电压互感器VoltagetransformerTV=调制器鉴频器DisoriminatorU=变换器解调器Demodulator变频器Frequencychanger编码器Coder变流器Converter设备、装置和元器件种类种类基本文字符号IEC中文名称英文名称单字母双字母调制器变换器逆变器InverterU=整流器Rectifier点板译码器Telegraphtranslator电子管晶体管气体放电管二极管晶体管晶闸管Gas-dischargetubeDiodeTransistorThyristorV=电子管ElectronictubeVE控制电路用电源的整流器RectifierforcontrolcircuitsupplyVC=传输通道波导天线导线电缆母线波导ConductorCableBusbarWaveguideW=波导定向耦合器WaveguidedirectionalCouper偶极天线抛物天线DipoleParbolicaerial端子插头插座连接插头和插座接线柱电缆封端和接头焊接端子板ConnectingplugandsockedClipCablesealingednandjointSolderingterminalstripX=连接片LinkXB=测试插孔TestjackXJ=插头PlugXP=插座SocketXS=端子板TerminalboardXT=电气操作的机械器件气阀PneumaticvalveY=电磁铁ElectromagnetYA=电磁制动器ElectromagneticallyoperatedbrakeYB=电磁离合器ElectromagneticallyoperatedclutchYC=电磁吸盘MagneticchuckYH=气动阀MotoroperatedvalveYM=电磁阀ElectromagneticallyoperatedvalveYV=终端设备电缆平衡网络CablebalancingnetworkZ=混合变压器压缩扩展器Compandor滤波器晶体滤波器Crystalfilter均衡器限幅器网络Network