IEC symbol forms

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IEC selector-switch contact: 3 stable position normally closed key operated neutral 1SS · Schematic IEC selector-switch contact: 3 stable position normally closed key operated neutral 2SS · Schematic IEC selector-switch contact: 3 stable position normally open key operated neutral 0SS · Schematic IEC selector-switch contact: 3 stable position normally open key operated neutral 1SS · Schematic IEC selector-switch contact: 3 stable position normally open key operated neutral 2SS · Schematic IEC selector-switch contact: 4 position key selector normally closedSS · Schematic IEC selector-switch contact: 4 position maintain, normally closedSS · Schematic IEC selector-switch contact: 4 stable positions key selector normally closedSS · Schematic IEC selector-switch contact: 4 stable positions key selector normally closed-rotating clockwiseSS · Schematic IEC selector-switch contact: 4 stable positions key selector normally closed-rotating in 2 waysSS · Schematic IEC selector-switch contact: 4 stable positions key selector normally openSS · Schematic IEC selector-switch contact: 4 stable positions key selector normally open-rotating clockwiseSS · Schematic IEC selector-switch contact: 4 stable positions key selector normally open-rotating in 2 waysSS · Schematic IEC selector-switch contact: normally closed anticipated contactSS · Schematic IEC selector-switch contact: normally closed delayed contactSS · Schematic IEC selector-switch contact: normally open anticipated contactSS · Schematic IEC selector-switch contact: normally open delayed contactSS · Schematic IEC set and reset dependency (S, R)Sm/Rm · Schematic IEC shift register (SRGm)SRG8 · Schematic IEC SR latch (rectangular form)S R · Schematic IEC subtracter (P-Q)P-Q · Schematic IEC summing amplifier element (Σ)Σ · Schematic IEC synchronous binary counter (CTRm)CTR4 · Schematic IEC T (toggle) flip-flop1T · Schematic IEC three-state buffer (rectangular form)EN · Schematic IEC three-state output qualifier3S · Schematic IEC timing-relay form: 3 clamp delay relay - de-energizedKT · Schematic IEC timing-relay form: 3 clamp delay relay - energizedKT · Schematic IEC timing-relay form: normally closed contact (instant)KT · Schematic IEC timing-relay form: normally closed delay on/offKT · Schematic IEC timing-relay form: normally open contact (instant)KT · Schematic IEC timing-relay form: normally open delay on/offKT · Schematic IEC timing-relay form: on/off delayKT · Schematic IEC touch-sensitive sensor: normally closed 3 wire with connectorTOUCH · Schematic IEC touch-sensitive sensor: normally open 3 wire with connectorTOUCH · Schematic IEC transparent D latch (rectangular form)C1 1D · Schematic IEC tunnel diode: tunnel diodeTUNNEL · Schematic IEC two-wire PLC point: in, 1st point, 2 wiresPLC · Schematic IEC two-wire PLC point: out, 1st point, 2 wiresPLC · Schematic IEC ultrasonic proximity sensor: normally closed 3 wire with connectorUS · Schematic IEC ultrasonic proximity sensor: normally open 3 wire with connectorUS · Schematic IEC up/down counterCTR +/- · Schematic Illuminated normally-closed pushbuttonPB NC LAMP · Schematic Illuminated normally-open pushbuttonPB NO LAMP · Schematic Impulse tachometric transducerHIN1B12 · Schematic Inbound-energy-flow qualifierQ020507 · SLD / Schematic Indicating instrument general symbol* · SLD / Schematic Indicator lampLamp · Schematic Inductive proximity switchPROX IND · Schematic Inline cable couplerX · Schematic Insulation monitoring relayIMD · Schematic / SLD Insulation resistance meterMΩ · Schematic Insulation-failure indicationQ021702 · Schematic Integrating instrument general symbol* · SLD / Schematic Interchange of conductorsX · SLD / Schematic Intermediate light switch plan markSI · GA Interposing current transformerICT · Schematic / SLD Intruder motion detector plan symbolPIR · GA Inverse-time characteristic qualifierIDMT · Schematic / SLD Ionising-radiation qualifierQ020903 · Schematic Iron-core reactorL IRON · SLD / Schematic Isolated DC-to-DC converterDC/DC ISO · SLD / Schematic Isolation-function qualifierQ070103 · SLD / Schematic Junction box plan markJB · GA Key-controlled two-way latching deviceQ1029603 · Schematic Key-operated normally-closed switchKEY NC · Schematic Key-operated normally-open switchKEY NO · Schematic Key-operation qualifierQ021313 · Schematic Latched foot-operated switchHFT11L · Schematic Latched key-operated switchKEY HOLD · Schematic Latched lever-operated switchHPB11LSL · Schematic Latched pull-cord switchHPC11L · Schematic Late-break normally-closed contactNC LATE · Schematic Late-make normally-open contactNO LATE · Schematic LED indicator lampLAMP LED · Schematic Lever-operated switchLEVER · Schematic Lever-operation qualifierQ021311 · Schematic Light-dependent resistorLDR · SLD / Schematic Lighting presence detector plan markPIR-L · GA Lighting track plan markTRK · GA Lightning air terminationAT · GA / Schematic Lightning protection down-conductorDC · GA / Schematic Lightning protection test jointTJ · GA / Schematic Limited two-way rotary-motion qualifierQ020405 · Schematic Line-interactive UPSUPS VI · SLD Linear fluorescent luminaire plan markLF · GA Liquid flow switchFS LIQ · Schematic Liquid-flow actuation qualifierQ021403 · Schematic Liquid-level actuation qualifierQ021401 · Schematic Load-break switchLBS · SLD / Schematic Local isolator plan markISO · GA Lockable disconnectorDS LOCK · SLD / Schematic Lockable switch-disconnectorSD LOCK · SLD / Schematic Loudspeaker annunciationHAN1B7 · Schematic Low-power current transformerLPCT · SLD / Schematic Luminaire general plan symbolL · GA Magnetic door holder plan symbolDH · GA Magnetic proximity switchPROX MAG · Schematic Magnetic-effect qualifierQ020802 · Schematic Magnetic-field-effect qualifierQ020804 · Schematic