Electrical reference directory

Page 23 of 32 · 3155 references, with definitions, drawing context and available downloads and previews.

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Motor run-feedback discrepancyMRD · Schematic Motor short-circuit fuseaM · SLD / Schematic Motor stalled-start trip interfaceMSTI · Schematic Motor starts-per-hour restraintMSR · Schematic Motor thermal-capacity permissiveMTP · Schematic Motor thermal-model protection49M · SLD / Schematic Motor underload process alarmMUPA · Schematic Motor-generator setMG · SLD / Schematic Motor-operated disconnector limit switch interfaceMDLSI · Schematic Motor-operation qualifierQ021326 · Schematic Motor-protection circuit breakerMPCB · GA / SLD Motorised intake-damper commandMIC · Schematic Motorised ventilation damperGA · GA / SLD Moulded-case circuit breakerMCCB · GA / SLD Moulded-case circuit breakerMCCB · SLD / Schematic Mounting platePlate · GA MPPT 1210 HUS hardware arrangementMPPT 1210 HUS · GA MPPT 2420 HC hardware arrangementMPPT 2420 HC · GA MPPT 2420 LC hardware arrangementMPPT 2420 LC · GA MPPT solar charge controllerGA · GA / SLD MPPT solar charge controllerMPPT · Schematic Multi-conductor terminal blockTB MULTI · Schematic Multi-core current transformerCT · SLD / Schematic Multi-level terminal blockGA · GA / Schematic Multi-pole plug and socketX · Schematic Multi-rate energy meterkWh · SLD / Schematic Multi-sensor fire detector plan symbolMSD · GA Multi-tube fluorescent luminaire plan markLF3 · GA Multicore cable sealing endSE · SLD / Schematic Multifrequency admittance earth-fault protection67YN · SLD / Schematic Multifunction device11 · SLD / Schematic Multifunction power meterPM · SLD / Schematic Multilevel terminal blockTB LEVEL · Schematic Multiple socket outletSOn · GA MV vacuum circuit-breaker truckGA · GA / SLD N-channel depletion MOSFETN-DMOS · Schematic N-channel enhancement MOSFETN-MOS · Schematic N-channel JFETN-JFET · Schematic NAND gateNAND · Schematic Negative-edge JK flip-flopJK-FF · Schematic Negative-sequence differential protection87Q · SLD / Schematic Negative-sequence overvoltage59Q · SLD / Schematic Network router symbolRTR · Schematic / GA Network switch symbolSW · Schematic / GA Neutral barGA · GA / Schematic Neutral conductor markN · SLD / Schematic Neutral CT directional-reference interfaceNCDI · Schematic Neutral differential protection87N · SLD / Schematic Neutral earthing resistorNER · SLD / Schematic Neutral earthing resistor cabinetNER · GA / SLD Neutral link, closedN · SLD / Schematic Neutral link, openN · SLD / Schematic Neutral reactor transformer interfaceNRTI · Schematic Neutral-current measuring relayK · Schematic / SLD Neutral-earthing resistor continuity supervisionNRCS · Schematic Neutral-earthing resistor measurement interfaceNRMI · Schematic Neutral-point-clamped inverterNPC · Schematic / SLD Neutral-to-earth linkMEN · SLD / Schematic Neutral-unbalance relay between two polyphase systemsK · Schematic / SLD Noiseless earth- · Schematic Non-inverting amplifier circuitNI-AMP · Schematic Non-inverting logic bufferBUF · Schematic Non-ionising radiation qualifierQ020901 · Schematic Non-maintained emergency luminaire plan markEM-NM · GA Non-resettable counter relayCOUNT TOTAL · Schematic NOR gateNOR · Schematic Normally closed contactNC · Schematic Normally closed pushbuttonPB NC · Schematic Normally interconnected busbar operating arrangementNIBOA · SLD / Schematic Normally open contactNO · Schematic Normally open pushbuttonPB NO · Schematic Normally split busbar operating arrangementNSBOA · SLD / Schematic Normally-closed limit switchLS NC · Schematic Normally-open limit switchLS NO · Schematic Notching or jogging device66 · SLD / Schematic NPN bipolar transistorNPN · Schematic NPN Darlington transistorNPN-DAR · Schematic NPN phototransistorPHOTO-NPN · Schematic NTP station time-service interfaceNSTI · Schematic Numerical protection relay (IED)IED · SLD / Schematic Off-delay normally-closed contactTOFF NC · Schematic Off-delay normally-open contactTOFF NO · Schematic Off-delay timer relayTOFF · Schematic Offline standby UPSUPS VFD · SLD / Schematic OhmmeterΩ · Schematic Oil-filled transformer installationGA · GA / SLD Oil-interrupter breaker referenceOBR · Schematic Oil-to-oil bushing interface referenceOBIR · Schematic On-delay normally-closed contactTON NC · Schematic On-delay normally-open contactTON NO · Schematic On-delay timer relayTON · Schematic One-line bus tapHDV1_BT_1- · SLD / Schematic One-line cable identificationHW01_1- · Schematic One-line connector representationHC01PJ_1- · Schematic One-line power receptacleHC01WR_1- · Schematic One-line terminal representationHT0001_1- · Schematic One-pulse-per-second timing interfaceOTI · Schematic One-way light switch plan markS1 · GA One-way linear-motion qualifierQ020401R · Schematic One-way rotary-motion qualifierQ020403 · Schematic