Electrical reference directory

Page 25 of 32 · 3155 references, with definitions, drawing context and available downloads and previews.

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PoE power-sourcing interfacePoE PSE · Schematic PoE powered-device interfacePoE PD · Schematic Point of common couplingPCC · SLD Polarised relay coilK POL · Schematic Polarity device36 · SLD / Schematic Pole-mounted luminaire plan markLP · GA Pole-operated mechanism discrepancyPMD · Schematic Portable equipment service-supply boundaryPESB · Schematic Portable test-supply connection boundaryPTCB · Schematic Position switch33 · SLD / Schematic Position-changing mechanism75 · SLD / Schematic Positive-edge D flip-flopD-FF · Schematic Positive-operation direction qualifierQ070109 · Schematic Post Glover neutral grounding resistor enclosureNGR enclosure · GA Potential test switchTS · Schematic PotentiometerPOT · SLD / Schematic Power cable jointCABLE JOINT · GA / SLD Power contactorGA · GA / Schematic Power conversion cabinetPCS cabinet · GA Power converter / inverterPCS · SLD / Schematic Power distribution blockX · Schematic / GA Power factor protection55 · SLD / Schematic Power plant controllerPPC · SLD Power quality analyserPQ · SLD / Schematic Power quality meterPQM · GA / SLD / Schematic Power transformerTX · SLD / Schematic Power-contactor function qualifierQ070101 · SLD / Schematic Power-factor meterPF · SLD / Schematic Power-factor-correction capacitor bankGA · GA / SLD Power-good indicationPG · Schematic Power-line carrier coupling-capacitor interfacePCCI · Schematic Power-rail enable interfaceEN · Schematic Power-rail sequencerSEQ · Schematic Power-source multiplexerPWR MUX · Schematic Power-transformer primary bay arrangementPPBA · Schematic Power-transformer secondary bay arrangementPSBA · Schematic Precision rectifierPREC-RECT · Schematic Prepayment energy meterkWh · SLD / Schematic Preset-adjustable capacitorHCA1_S00575 · Schematic Pressure measurement interfaceP MEAS · Schematic Pressure switch NCPS NC · Schematic Pressure switch NOPS NO · Schematic Pressure switch or relay63 · SLD / Schematic Pressure-to-current converterHIN1B10 · Schematic Presumed-fault-location indicationQ021701 · Schematic Primary equipment frame-bond interfacePEFI · Schematic Primary test-boundary representationPTR · Schematic Priority encoderENC-PRI · Schematic Process-bus maintenance isolation boundaryPMIB · Schematic Process-bus redundant-network interfacePRI · Schematic Process-network link-health inputPLI · Schematic Protected-access manual-operation qualifierQ021302 · Schematic Protection channel asymmetric-delay indicationPCAI · Schematic Protection channel latency-monitor interfacePCLI · Schematic Protection communication redundant-path selectorPCRS · Schematic Protection communication-failure fallbackPCF · Schematic Protection fiber receive interfacePFRI · Schematic Protection fiber transmit interfacePFTI · Schematic Protection relay IEDGA · GA / Schematic Protection relay panelGA · GA / Schematic Protection test-mode status inputPTSI · Schematic Protection trip distribution matrixPTDM · Schematic Protection-core CT secondary circuitPCSC · Schematic Protection-electronics supply branchPSB · Schematic Protection-panel service AC feederPSAF · Schematic Protection-winding VT secondary circuitPVSC · Schematic Protective conductor markPE · SLD / Schematic Protective earthPE · SLD / Schematic Protective equipotential bondingBOND PE · SLD / Schematic Protective-earth terminal blockGA · GA / Schematic Protective-earth terminal blockTB PE · Schematic PTP boundary-clock interfacePBI · Schematic PTP client synchronization statusPCSS · Schematic PTP grandmaster timing interfacePGTI · Schematic Pull-cord switchPULL CORD · Schematic PULS QS20.241QS20.241 · GA / Schematic Push button plan markPB · GA Push-pull converter topologyPUSH-PULL · Schematic / SLD Push-to-test indicator lampLAMP TEST · Schematic Pushbutton-operation qualifierQ021305 · Schematic PV central inverterINV CTR · SLD PV DC isolator enclosureGA · GA / SLD PV inverter cabinetGA · GA / SLD PV microinverterMI · SLD / Schematic PV string combiner boxGA · GA / SLD PV string inverterINV STR · SLD Pyrometer indicationHIN1P25 · Schematic Radar level sensing functionRAD LVL · Schematic Rate-of-change relay7 · SLD / Schematic Rate-of-change-of-frequency protection81R · SLD / Schematic Rate-of-rise heat detector plan symbolHD-R · GA RC networkRC · SLD / Schematic RCD-protected socket outletSO-RCD · GA Reactive-energy meterkvarh · SLD / Schematic Reactive-power metervar · SLD / Schematic Reactive-power undervoltage protection27Q · SLD / Schematic ReactorL · SLD / Schematic Recessed downlight plan markDL · GA Recording ammeterA · SLD / Schematic Recording instrument general symbol* · SLD / Schematic