电气英语证书考试(pec)-electricityglossary

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1、电气英语证书考试(PEC)-ElectricityGlossaryAac-abbreviationforalternatingcurrentactivepower-seerealpoweralternatingcurrent-anelectricalcurrentwhichreversesdirectionrepeatedlyduetoachangeinvoltagewhichoccursatthesamefrequency.OftenabbreviatedACorac.alternator-anelectricge

2、neratordesignedtoproducealternatingcurrent.Usuallyconsistsofrotatingpartswhichcreatedthechangingmagneticfieldtoproducethealternatingcurrent.AmericanNationalStandardsInstitute-aprivateorganizationthatcoordinatesand/orapprovessomeUSstandards,particularlythoserela

3、tedtotheelectricalindustry.AbbreviatedANSI.AmericanWireGauge-Astandardmeasurewhichrepresentsthesizeofwire.Thelargerthenumber,thesmallerthewire.AbbreviatedAWG.ampacity-themaximumcontinuouscurrentthataconductorcancarrywithoutoverheatingaboveitstemperaturerating.A

4、mpere-electriccurrentproducedbyonevoltappliedacrossaresistanceofoneohm.Itisalsoequaltotheflowofonecoulombpersecond.NamedafterFrenchphysicistAndreM.Ampère1836.ambienttemperature-thesurroundingtemperature.Ampere-hour-theflowofelectricityequaltooneampereforonehour

5、.Commonlyusedtoratethecapacityofbatteries.analog-ameasuringordisplaymethodologywhichusescontinuouslyvaryingphysicalparameters.Incontrast,digitalrepresentsinformationindiscretebinaryformusingonlyzerosandones.apparentpower-themathematicalproductofvoltageandcurren

6、tonacsystems.Sincevoltageandcurrentmaynotbeinphaseonacsystems,theapparentpowerthuscalculatedmaynotequaltherealpower,butmayactuallyexceedit.Reactiveloads(inductanceand/orcapacitance)onacsystemswillcausetheapparentpowertobelargerthantherealpower.AWG-abbreviationf

7、orAmericanWireGauge.Bbattery-agroupoftwoormorecellsconnectedtogethertoprovideelectricalcurrent.Sometimesalsousedtodescribeasinglecellwhichconvertschemicalenergytoelectricalcurrent.batterycyclelife-thenumberofdischargeandrechargecyclesthatabatterycanundergobefor

8、edegradingbelowitscapacityrating.batteryself-discharge-thegraduallossofchemicalenergyinabatterythatisnotconnectedtoanyelectricalload.blackstart-referstocertainelectricutilit