Electrical component symbols explanation

　　1. Ammeter PA Voltmeter PV Active watt-hour meter PJ Reactive watt-hour meter PJR Frequency meter PF Phase meter PPA Maximum demand meter (load monitor) PM Power factor meter PPF Active power meter PW Reactive power meter PR Reactive ammeter PAR.

　　2. Acoustic signal HA light signal HS indicator light HL red light HR green light HG yellow light HY blue light HB white light HW.

　　3. Connector XB Plug XP Socket XS Terminal Board XT Wire, Cable, Busbar W DC Busbar WB Plug-in (Feeder) Busbar WIB Power Branch Line WP Lighting Branch Line WL Emergency Lighting Branch Line WE Power Main Line WPM Lighting Main Line WLM Emergency Lighting main line WEM trolley line WT closing small busbar WCL control small busbar WC signal small busbar WS flashing small busbar WF accident audio small busbar WFS warning sound small busbar WPS voltage small busbar WV accident lighting small busbar WELM.

　　4. Lightning arrester F fuse FU fast fuse FTF drop fuse FF voltage limiting protection device FV capacitor C power capacitor.

　　5.CE forward button SBF reverse button SBR stop button SBS emergency button SBE test button SBT reset button SR limit switch SQ proximity switch SQP manual control switch SH time control switch SK liquid level control switch SL humidity control switch SM pressure control switch SP speed control switch SS temperature control switch, auxiliary switch ST voltmeter switch SV ammeter switch SA.

　　6. Rectifier U Silicon Controlled Rectifier UR Control Circuit Powered Rectifier VC Inverter UF Inverter UC Inverter UI.

　　7. Motor M asynchronous motor MA synchronous motor MS DC motor MD wound rotor induction motor MW squirrel cage motor MC.

　　8. Electric valve YM solenoid valve YV fire damper YF smoke exhaust valve YS solenoid lock YL trip coil YT closing coil YC pneumatic actuator YPA, YA electric actuator YE.

　　9. Heating device (electric heating) FH lighting lamp (light emitting device) EL air conditioner EV electric heater heating element EE induction coil, reactor L excitation coil LF arc suppression coil LA filter capacitor LL resistor, varistor R potentiometer RP Thermistor RT Photoresistor RL Varistor RPS Grounding resistance RG Discharge resistance RD Start-up varistor RS Frequency-sensitive varistor RF Current limiting resistor RC.

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