pec电气工程专业英语证书考试-electricityglossary

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1、PEC电气工程专业英语证书考试-ElectricityGlossaryAac-abbreviationforalternatingcurrentactivepower-seerealpoweralternatingcurrent-anelectricalcurrentwhichreversesdirectionrepeatedlyduetoachangeinvoltagewhichoccursatthesamefrequency.OftenabbreviatedACorac.alternator-anelectricgeneratordesignedtoproducealte

2、rnatingcurrent.Usuallyconsistsofrotatingpartswhichcreatedthechangingmagneticfieldtoproducethealternatingcurrent.AmericanNationalStandardsInstitute-aprivateorganizationthatcoordinatesand/orapprovessomeUSstandards,particularlythoserelatedtotheelectricalindustry.AbbreviatedANSI.AmericanWireGau

3、ge-Astandardmeasurewhichrepresentsthesizeofwire.Thelargerthenumber,thesmallerthewire.AbbreviatedAWG.ampacity-themaximumcontinuouscurrentthataconductorcancarrywithoutoverheatingaboveitstemperaturerating.Ampere-electriccurrentproducedbyonevoltappliedacrossaresistanceofoneohm.Itisalsoequaltoth

4、eflowofonecoulombpersecond.NamedafterFrenchphysicistAndreM.Ampère1836.ambienttemperature-thesurroundingtemperature.Ampere-hour-theflowofelectricityequaltooneampereforonehour.Commonlyusedtoratethecapacityofbatteries.analog-ameasuringordisplaymethodologywhichusescontinuouslyvaryingphysicalpar

5、ameters.Incontrast,digitalrepresentsinformationindiscretebinaryformusingonlyzerosandones.apparentpower-themathematicalproductofvoltageandcurrentonacsystems.Sincevoltageandcurrentmaynotbeinphaseonacsystems,theapparentpowerthuscalculatedmaynotequaltherealpower,butmayactuallyexceedit.Reactivel

6、oads(inductanceand/orcapacitance)onacsystemswillcausetheapparentpowertobelargerthantherealpower.AWG-abbreviationforAmericanWireGauge.Bbattery-agroupoftwoormorecellsconnectedtogethertoprovideelectricalcurrent.Sometimesalsousedtodescribeasinglecellwhichconvertschemicalenergytoelectricalcurren

7、t.batterycyclelife-thenumberofdischargeandrechargecyclesthatabatterycanundergobeforedegradingbelowitscapacityrating.batteryself-discharge-thegraduallossofchemicalenergyinabatterythatisnotconnectedtoanyelectricalload.blackstart-referstocertainelectricutil