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Amplifier using discreteA =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Transistor amplifierAD=集成电路放大器Integrated circuit amplifierAJ=磁放大器Magnetic amplifierAM=电子管放大器Valve amplifierAV=印制电路板Printed circuit boardAP=抽屉柜Drawer AT=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Ther moelectric sensorB=热电池Thermo-cell光电池Photoelectric cell测功计Dynamometer晶体换能器Crystal transducer送话器Microphone拾音器Pick up扬声器Louds peaker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）Analogue and multiple-step digital Transducers or sensors(as used indicating measuring purposes)压力变换器Pressure transducerBP=位置变换器Position transducer BQ=旋转变换器（测速发电机）Rotation transducer(tacho generator)BR=温度变换器Temperature transducerBT=速度变换器Velocity transducerBV=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制元件延迟器件存储器件数字集成电路和器件:Digital integrated circuits and devices:D=延迟线Delay line双稳态元件Bistable element单稳态元件Monostable element磁芯存储器Core storage寄存器Register磁带记录机Magnetic tape recorder盘式记录机Disk recorder其他元器件本表其他地方未规定的器件E=发热器件Heating deviceEH=照明灯Lamp for lightingEL=空气调节器VentilatorEV=保护器件过电压放电器件避雷器Over voltage discharge device ArresterF=具有瞬时动作的限流保护器件Current threshold protective device withInstantaneous actionFA=具有延时动作的限流保护器件Current threshold protective device withTime-lag actionFR=具有延时和瞬时动作的限流保护器件Current threshold protective device withInstantaneous and time-lag actionFS=熔断器FuseFU=限压保护器件Voltage threshold protective deviceFV=发生器发电机电源旋转发电机振荡器Rotating generator OscillatorG=发生器Generator GS=同步发电机Synchronous generator异步发电机Asynchronous generatorGA蓄电池BatteryGB=旋转式或固定式变频机Rotating or static frequency converterGF=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Acoustical indicatorHA=光指示器Optical indicatorHL=指示灯Indicator lampHL=继电器接触器K=瞬时接触继电器Instantaneous contactor relayKA=瞬 时有或无继电器Instantaneous all or nothing RellayKA=交流继电器Alternating realyKA闭锁接触继电器（机械闭锁或永磁铁式有或无继电器)Latching contactor realy(all-or-nothing relay with me chanicallatch or permanent magnet)KL=双稳态继电器Bistable relay KL=接触器ContactorKM=极化继电器Polarized relayKP=簧片继电器Reed relayKR=延 时有或无继电器Time-delay all-or-nothing relay KT=逆流继电器Reverse current relayKR=电感器电抗器感应线圈线路陷波器电抗器（并联和串联）Induction coil Line trapReactors(shunt and series)L=电动机电动机MotorM=同步电动机Synchronous motorMS可做发电机或电动机的电机Machine capable of use as a generator or motor MG力矩电动机Torque motorMT模拟元件运算放大器Operational amplifierN=混合模拟/数字器件Hybrid analogue/digital device 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Indicating devicesP=记录器件Recording devices积算测量器件Integrating measuring devices信号发生器Singnal generator电流表AmmeterPA=（脉冲）计数器(Pulse) CounterPC=电度表Watt hour meterPJ=记录仪表Recording instrument PS=时钟、操作时间表Clock,Operating time meterPT=电压表VoltmeterPV=电力电路的开关器件Q=断路器Circuit-breakerQF=电动机保护开关Motor protection switchQM=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Measuring shuntRS=热敏电阻器Resistor with inherent variabilitydependent on the temperature RT=压敏电阻器Resistor with inherent variability dependent on the voltage RV=控制、记忆、信号电路的开关器件选择拨号接触器连接级Dial contactConnecting stageS=控制开关Control switchSA=选择开关Selector switch SA=按纽开关Push-button SB=机电式有或无传感器（单级数字传感器）All-or-nothing sensors of mechanical and electronic nature(one-step digital sensors)液体标高传感器Liquid level sensorSL=压力传感器Pressure sensorSP=位置传感器（包括接近传感器）Position sensor (including proximity-sensor)SQ=转数传感器Rotation sensorSR=温度传感器Temperature sensorST=变压器T=电流互感器Current transformer TA=控制电路电源用变压器Transformer for control circuit supplyTC=电力变压器 Power transformerTM=磁稳压器Magmetic stabilizerTS=电压互感器Voltage transformerTV=调制器变换器鉴频器DisoriminatorU