Electrical reference directory

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IEC selector-switch contact: 3 position normally open key operated neutral 2SS · Schematic IEC selector-switch contact: 3 position normally open neutral 0SS · Schematic IEC selector-switch contact: 3 position normally open neutral 1SS · Schematic IEC selector-switch contact: 3 position normally open neutral 2SS · Schematic IEC selector-switch contact: 3 stable position normally closed key operated neutral 0SS · Schematic 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 Incomer transfer-in-progress indicationITI · Schematic Incomer-bus-tie interlock matrixIIM · Schematic Incomplete-sequence relay48 · SLD / Schematic Independent trip-supply changeoverITC · Schematic Indicating instrument general symbol* · SLD / Schematic Indication-lamp supply branchISB · Schematic Indicator lampLamp · Schematic Induced-current earthing-switch duty referenceIEDR · Schematic Inductive position sensorIND POS · Schematic Inductive proximity switchPROX IND · Schematic Inductive voltage-transformer yard referenceIVYR · Schematic Industrial Ethernet switchGA · GA / Schematic Industrial panel PCGA · GA / Schematic Industrial ventilation fanGA · GA / SLD Industrial VPN routerGA · GA / Schematic Inline cable couplerX · Schematic Instantaneous ground overcurrent50G · SLD / Schematic Instantaneous negative-sequence overcurrent50Q · SLD / Schematic Instantaneous neutral overcurrent50N · SLD / Schematic Instantaneous overcurrent50 · SLD / Schematic Instantaneous phase overcurrent50P · SLD / Schematic Instrumentation amplifierINA · Schematic Insulated-gate bipolar transistorIGBT · Schematic Insulation monitoring relayIMD · Schematic / SLD Insulation resistance meterMΩ · Schematic Insulation-failure indicationQ021702 · Schematic Intake-damper open-proof gateIOG · Schematic Integrated gate-commutated thyristorIGCT · Schematic Integrated load switchLOAD SW · Schematic Integrating instrument general symbol* · SLD / Schematic Interchange of conductorsX · SLD / Schematic Interface relay moduleGA · GA / Schematic Interlock-bypass supervisionIS · Schematic Interlock-permissive discrepancy alarmIDA · Schematic Intermediate light switch plan markSI · GA Interposing CT ratio-matching interfaceICRI · Schematic Interposing current transformerICT · Schematic / SLD Intruder motion detector plan symbolPIR · GA Invalid-position fail-block gateIFG · Schematic Inverse-time characteristic qualifierIDMT · Schematic / SLD Invertek Drives Optidrive EcoOptidrive Eco · GA / Schematic Inverting amplifier circuitINV-AMP · Schematic Inverting buck-boost topologyINV-BB · Schematic / SLD Ionising-radiation qualifierQ020903 · Schematic IRIG-B time-distribution interfaceITI · Schematic Iron-core reactorL IRON · SLD / Schematic Isolated analogue-to-digital converterISO ADC · Schematic Isolated CAN transceiverISO CAN · Schematic Isolated comparatorISO CMP · Schematic