IEC symbol forms

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Three-winding transformerTX 3W · SLD / Schematic Three-wire inductive proximity switchPROX IND 3W · Schematic Three-wire touch-sensitive switchHPX11TS3 · Schematic Three-wire ultrasonic sensorHPX11U3 · Schematic Thyristor phase-controlled rectifierSCR REC · SLD / Schematic Thyristor-controlled reactorTCR · SLD / Schematic Thyristor-switched capacitorTSC · SLD / Schematic Time switch plan markTSW · GA Time-delay push switch plan markST · GA Timed-operation qualifierQ021327 · Schematic Touch-sensitive switchHPX1TS · Schematic Touch-switch NC outputHPX12TS · Schematic Touch-switch NO outputHPX11TS · Schematic Transformer-fed indicator lampLAMP TX · Schematic Transition indicationQ101101 · Schematic TRIACTRIAC · Schematic Trip-circuit supervision relayTCS · Schematic Twelve-pulse rectifier12P · SLD Twisted-pair indicationHT0_TW · Schematic Two-network voltage measurement selectorHSW1S93 · Schematic Two-phase winding connectionQ060201 · SLD / Schematic Two-pole one-way switch plan markS2P · GA Two-pole power switchSW 2P · SLD / Schematic Two-way latching deviceQ1020603 · Schematic Two-way light switch plan markS2W · GA Two-way linear-motion qualifierQ020402 · Schematic Two-way rotary-motion qualifierQ020404 · Schematic Ultrasonic NC switching outputHPX12U · Schematic Ultrasonic NO switching outputHPX11U · Schematic Ultrasonic proximity switchHPX1U · Schematic Underground cableUGC · SLD / GA Underwater cableSC · SLD / GA Unidirectional propagation qualifierQ020501 · Schematic Unidirectional semiconductor power switchSSW UNI · SLD / Schematic UPS maintenance bypassMBP · SLD Utility grid connectionGRID · SLD Variable resistorR VAR · SLD / Schematic Variable-slip wind turbine generator (Type 2)WTG T2 · SLD / Schematic VaristorVDR · SLD / Schematic Volt-squared-hour meterV²h · Schematic Voltage measuring transducerU/I · Schematic Voltage presence indicating systemVPIS · SLD / Schematic Voltage transformerVT / PT · SLD / Schematic Voltage transformer set with broken-delta residual windingVT · SLD / Schematic Voltage transformer with two secondary windingsVT · SLD / Schematic VoltmeterV · SLD / Schematic Wall-mounted luminaire plan markLW · GA Water heater plan markWH · GA Weatherproof socket outletSO-IP · GA Wind generating stationWIND STN · SLD / Schematic Winding temperature indicatorWTI · Schematic / SLD Wire spliceSPLICE · Schematic Wireless access point symbolWAP · GA / Schematic Wound-primary current transformerCT · SLD / Schematic Wound-rotor induction motorM WR · SLD / Schematic Yd5 transformer connection referenceYd5 · SLD / Schematic Yd11 transformer connection referenceYd11 · SLD / Schematic Yy6 transformer connection referenceYy6 · SLD / Schematic Yz5 transformer connection referenceYz5 · SLD / Schematic Yz11 transformer connection referenceYz11 · SLD / Schematic Zener diodeZD · Schematic Zigzag winding connectionZIGZAG · SLD / Schematic