pec电气工程专业英语证书考试-基础电气工程术语和定义

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1、PEC电气工程专业英语证书考试-BasicElectricalengineeringtermsanddefinitionsAccessFitting.Afittingthatpermitsaccesstoconductorsinconcealedorenclosedwiring,elsewherethanatanoutlet.ActiveElectricalNetwork.Anetworkthatcontainsoneormoresourcesofelectricalenergy.Admittance.Thereciprocalofimpedan

2、ce.Air-BlastTransformer.Atransformercooledbyforcedcirculationofairthroughitscoreandcoils.AirCircuitBreaker.Acircuitbreakerinwhichtheinterruptionoccursinair.AirSwitch.Aswitchinwhichtheinterruptionofthecircuitoccursinair.Alive.Electricallyconnectedtoasourceofemf,orelectricallyc

3、hargedwithapotentialdifferentfromthatoftheearth.Also,practicalsynonymforcurrent-carryingorhot.AlternatingCurrent.Aperiodiccurrent,theaveragevalueofwhichoveraperiodiszero.Alternator.Synchronousgenerator;asynchronousalternatingcurrentmachinethatchangesmechanicalpowerintoelectri

4、calpower.AmbientTemperature.Thetemperatureofasurroundingcoolingmedium,suchasgasorliquid,thatcomesintocontactwiththeheatedpartsofanapparatus.Ammeter.Aninstrumentformeasuringelectriccurrent.Ampere.Achargeflowofonecoulombpersecond.Annunciator.Anelectromagneticallyoperatedsignali

5、ngapparatusthatindicateswhetheracurrentisflowingorhasflowedinoneormorecircuits.ApparentPower.Inasingle-phase,two-wirecircuit,theproductoftheeffectivecurrentinoneconductormultipliedbytheeffectivevoltagebetweenthetwopointsofentry.Appliance.Current-consumingequipment,fixedorport

6、able,suchasheatingormotor-operatedequipment.Arc-FaultCircuitInterrupter(AFCI).Anelectricaldevicethatdetectstheuniqueelectroniccharacteristicsofelectricalarcs.Ifanarcissensed,thedevicefurtherdeenergizesthecircuittowhichitisconnected.ArcingContacts.Contactsonwhichanarcisdrawnaf

7、terthemaincontactsofaswitchorcircuitbreakerhaveparted.ArcingTimeofFuse.Thetimeelapsingfromtheseveranceofthefuselinktothefinalinterruptionofthecircuitunderspecifiedconditions.Arc-OverofInsulator.Adischargeofpowercurrentintheformofanarc,followingasurfacedischargeoveraninsulator

8、.ArmorClamp.Afittingforgrippingthearmorofacableatthepointwherethearm