Electrical reference directory

Page 13 of 32 · 3155 references, with definitions, drawing context and available downloads and previews.

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Dual-incomer normally-closed bus tieDNBT · Schematic Dual-incomer normally-open bus tieDNBT · Schematic Dual-incomer parallel-closing interlockDPI · Schematic Duct smoke detector plan symbolDSD · GA Dump load controllerDLC · SLD / Schematic Duplex power receptacleHCN1RDUP · Schematic Duty-standby ventilation fan selectionDVFS · Schematic Dy5 transformer connection referenceDy5 · SLD / Schematic Dy11 transformer connection referenceDy11 · SLD / Schematic Dynamic voltage restorerDVR · SLD Dz0 transformer connection referenceDz0 · SLD / Schematic Dz6 transformer connection referenceDz6 · SLD / Schematic Early-break normally-closed contactNC EARLY · Schematic Early-make normally-open contactNO EARLY · Schematic Earth barGA · GA / Schematic Earth connectionEARTH · SLD / Schematic Earth electrodeE · SLD / GA Earth electrode with inspection pitE · GA / SLD Earth grid conductorEG · GA Earth-continuity measurement boundaryEMB · Schematic Earth-fault current relayK · Schematic / SLD Earth-fault voltage relayK · Schematic / SLD Earthing switchES · SLD / Schematic Earthing-switch motor operator interfaceEMOI · Schematic Earthing-switch position discrepancy interfaceEPDI · Schematic Earthing-switch-open breaker interlockEBI · Schematic Electric space heater plan markHTR · GA Electrically operated valve20 · SLD / Schematic Electrolytic capacitorC ELEC · SLD / Schematic Electromagnetic brake actuatorHSV1Y4 · Schematic Electronic fuse ICEFUSE · Schematic Electronic motor overload relayGA · GA / Schematic Electrostatically screened transformerTX SCREEN · SLD / Schematic Embedded-generation export interfaceEEI · Schematic Emergency shutdown reset-authority interfaceESRI · Schematic Emergency stop stationGA · GA / Schematic Emergency-lighting common-failure interfaceECI · Schematic Emergency-operation qualifierQ021308 · Schematic Emergency-stop operatorE-stop · Schematic emonPi2 hardware arrangementemonPi2 · GA emonTx3 hardware arrangementemonTx3 · GA Enclosure air conditionerGA · GA / SLD Enclosure air-to-air heat exchangerGA · GA / SLD Enclosure anti-condensation heaterGA · GA / SLD Enclosure condensation-control requestECR · Schematic Enclosure door swing envelopeGA · GA / SLD Enclosure filter fanGA · GA / SLD Enclosure gland plateGA · GA / SLD Enclosure hygrostatGA · GA / SLD Enclosure plinthGA · GA / SLD Enclosure thermostatGA · GA / SLD Energy meter repeaterkWh · Schematic Energy meter with maximum-demand indicatorkWh/MD · SLD / Schematic Energy meter with pulse transmitterkWh · SLD / Schematic Energy submeterGA · GA / Schematic Energy-management controllerEMS · GA / SLD Engaged mechanical couplingQ021218 · Schematic Equalizer circuit breaker22 · SLD / Schematic Equipment maintenance envelopeGA · GA / SLD Equipment removal routeGA · GA / SLD Essential-service feeder trip indicationEFTI · Schematic Ethernet physical-layer transceiverPHY · Schematic EV charger power moduleEV PWR · Schematic EV charging contactor controlEV K · Schematic EV charging energy measurementEV kWh · Schematic EV charging residual-current detectionRCD EV · Schematic EV control pilot interfaceCP · Schematic Event recorder time-quality flagERTF · Schematic Event-count actuation qualifierQ021402 · Schematic Excess-energy meterkWh> · SLD / Schematic Exciter or DC generator relay53 · SLD / Schematic Exclusive-NOR gateXNOR · Schematic Exclusive-OR gateXOR · Schematic Exit sign luminaire plan markEXIT · GA Extract fan plan markEF · GA Fast earthing-switch functional referenceFEFR · Schematic Fault passage indicatorFPI · SLD / Schematic Feed-through terminal blockTB FEED · Schematic Feed-through terminal blockGA · GA / Schematic Feeder backfeed monitoring interfaceFBMI · Schematic Feeder buswayBD · SLD / GA Feedthrough capacitorC FEED · SLD / Schematic Fibre-optic connectorX · Schematic Fibre-optic link symbolFO · Schematic / GA Fibre-optic patch panelGA · GA / SLD Field application relay56 · SLD / Schematic Field circuit breaker41 · SLD / Schematic Field ground-fault protection64F · SLD / Schematic Field or loss-of-excitation protection40 · SLD / Schematic Field-changing contactor93 · SLD / Schematic Fire alarm control panel locationGA · GA / SLD Fire alarm control panel plan symbolFACP · GA Fire alarm sounder plan symbolSNDR · GA Fire cause-and-effect output matrixFCOM · Schematic Fire damperGA · GA / SLD Fire suppression discharged-status interfaceFSDI · Schematic Fire suppression pre-discharge indication interfaceFSPII · Schematic Fire-damper closed-proof interfaceFCI · Schematic Fire-interface healthy-loop supervisionFHS · Schematic Fire-system equipment shutdown requestFESR · Schematic