MIL-STD-704F-2004-美军标-AIRCRAFT-ELECTRIC-POWER-CHARACTERISTICS飞机电气特性.pdf
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MIL-STD-704F-2004-美军标-AIRCRAFT-ELECTRIC-POWER-CHARACTERISTICS飞机电气特性.pdf
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MIL-STD-704F12MARCH2004SUPERSEDINGMIL-STD-704E1MAY1991DEPARTMENTOFDEFENSEINTERFACESTANDARDAIRCRAFTELECTRICPOWERCHARACTERISTICSAMSCN/AAREASESSNOTMEASUREMENTSENSITIVESource:
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20ZCheckthesourcetoverifythatthisisthecurrentversionbeforeuse.MIL-STD-704FiiFOREWORD1.ThisstandardisapprovedforusebyallDepartmentsandAgenciesoftheDepartmentofDefense.2.Thepurposeofthisinterfacestandardistoensurecompatibilitybetweentheaircraftelectricsystem,externalpower,andairborneutilizationequipment.3.Comments,suggestions,orquestionsonthisdocumentshouldbeaddressedtoCommander,NavalAirSystemsCommand,Code4.1.4,Highway547,Lakehurst,NJ08733-5100oremailtothomas.omaranavy.mil.Sincecontactinformationcanchange,youmaywanttoverifythecurrencyofthisaddressinformationusingtheASSISTOnlinedatabaseatwww.dodssp.daps.mil.Source:
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20ZCheckthesourcetoverifythatthisisthecurrentversionbeforeuse.MIL-STD-704FiiiCONTENTSPARAGRAPHPAGEFORWARD.ii1.SCOPE.11.1Scope.12.APPLICABLEDOCUMENT.12.1General.12.2Governmentdocuments.12.2.1Specifications,standardsandhandbooks.12.3Orderofprecedence.13.DEFINITIONS.13.1Acronymsusedinthisstandard.13.2Abnormaloperation.23.3ACvoltage.23.4Aircraftelectricpowersystems.23.5Crestfactor.23.6Current.23.7Currentmodulation.23.8DCvoltage.23.9Distortion.33.10Distortionfactor.33.11Distortionspectrum.33.12Electricstartingoperation.33.13Emergencyoperation.33.14Externalpowersource.33.15Frequency.33.16Frequencymodulation.33.17Loadunbalance.33.18Normaloperation.33.19Overfrequencyandunderfrequency.43.20Overvoltageandundervoltage.43.21Pointofregulation.43.22Powerfactor.43.23Pulsedload.43.24Rateofchangeoffrequency.43.25Ripple.43.26Steadystate.43.27Transferoperation.43.28Transient.53.29Utilizationequipment.53.30Utilizationequipmentterminals.53.31Voltagemodulation.53.32Voltagephasedifference.53.33Voltageunbalance.5Source:
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20ZCheckthesourcetoverifythatthisisthecurrentversionbeforeuse.MIL-STD-704FivCONTENTSPARAGRAPHPAGE4.GENERALREQUIREMENTS.54.1Aircraftelectricpowersystemrequirements.54.1.1Aircraftelectricpowersystemperformance.54.1.2Electricpowersourcecharacteristics.54.1.3Protectivedevices.64.2Aircraftutilizationequipmentrequirements.64.2.1Powercompatibility.64.2.2Operation.64.2.2.1Normaloperation.64.2.2.2Abnormaloperation.64.2.2.3Transferoperation.64.2.2.4Emergencyoperation.64.2.2.5Startingoperation.64.2.3Powerfailure.74.2.4ACpowerutilization.74.3Externalpowersourcerequirement.74.4Testrequirements.75.DETAILEDREQUIREMENTS.75.1Transferoperationcharacteristics.75.2ACpowercharacteristics.75.2.1Typesystem.75.2.2Phasesequence.85.2.3Normaloperation.85.2.4Abnormaloperation.85.2.5Emergencyoperation.85.3DCpowercharacteristics.85.3.1Typesystem.85.3.228voltsDCsystem.85.3.2.1Normaloperation.85.3.2.2Abnormaloperation.85.3.2.3Emergencyoperation.95.3.2.4Electricstarting.95.3.3270voltsDCsystem.95.3.3.1Normaloperation.95.3.3.2Abnormaloperation.95.3.3.3Emergencyoperation.95.4Loadcharacteristics.95.4.1Grounding.95.4.2Loadunbalance.95.4.3Powerfactor.95.4.4Polarityorphasereversal.95.4.5Multipleinputterminals.9Source:
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20ZCheckthesourcetoverifythatthisisthecurrentversionbeforeuse.MIL-STD-704FvCONTENTSPARAGRAPHPAGE6.NOTES.106.1Intendeduse.106.2Considerations.106.3Supersessiondata.106.4Internationalstandardizationimplementation.106.5Changesfrompreviousissue.106.6Applicationofthisstandardinutilizationequipmentspecifications.106.7Pulsedloaddesignissues.116.8Non-linearloadsandeffects.116.9Precedence.116.10Guidanceandlessonslearned.116.10.1Compatibilityandtesting.116.10.2Compatibilityandinstallation.126.11Subjectterm(keyword)listing.12TABLESIACnormaloperationcharacteristics-400Hertz(see5.2.3).13IIACnormaloperationcharacteristics-variablefrequency(see5.2.3).13IIIACnormaloperationcharacteristics-60Hertz(see5.2.3).14IVDCnormaloperationcharacteristics(see5.3.2.1,5.3.4.1).14FIGURES1Loadunbalancelimitsforthreephaseutilizationequipment.152Phasordiagramshowingrequiredphasesequencerelationship.163Envelopeofnormal400HzandvariablefrequencyACvoltagetransient.174Limitsfor400HzandvariablefrequencyACovervoltageandundervoltage.185Envelopeofnormal400HzACfrequencytransient.196Limitsfor400HzACoverfrequencyorunderfrequency.207Maximumdistortionspectrumof400HzandvariablefrequencyACvoltage.218Envelopeofnormal60Hzvoltagetransient.229Limitsfor60HzACovervoltageandundervoltage.2310Envelopeofnormal60HzACfrequencytransient.2411Limitsfor60HzACoverfrequencyandunderfrequency.2512Maximumdistortionspectrumof60HzACvoltage.2613Envelopeofnormalvoltagetransientsfor28voltsDCsystem.2714Limitsforovervoltageandundervoltagefor28voltsDCsystem.2815Maximumdistortionspectrumfor28voltsDCsystem.2916Envelopeofnormalvoltagetransientfor270voltsDCsystem.3017LimitsforDCovervoltageandundervoltagefor270voltsDCsystem.3118Maximumdistortionspectrumfor270voltsDCsystem.32CONCLUDINGMATERIAL.33Source:
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20ZCheckthesourcetoverifythatthisisthecurrentversionbeforeuse.MIL-STD-704F11.SCOPE1.1Scope.Thisstandardestablishestherequirementsandcharacteristicsofaircraftelectricpowerprovidedattheinputterminalsofelectricutilizationequipment.MIL-HDBK-704-1through-8definestestmethodsandproceduresfordeterminingairborneutilizationequipmentcompliancewiththeelectricpowercharacteristicsrequirementsdefinedherein.Electromagneticinterferenceandvoltagespikesarenotcoveredbythisstandard.2.APPLICABLEDOCUMENTS2.1General.Thedocumentlistedinthissectionisspecifiedinsections3,4,and5ofthisstandard.Thissectiondoesnotincludedocumentscitedinothersectionsofthisstandardorrecommendedforadditionalinformationorasexamples.Whileeveryefforthasbeenmadetoensurethecompletenessofthislist,documentusersarecautionedthattheymustmeetallspecifiedrequirementsdocumentscitedinsections3,4,and5ofthisstandard,whetherornottheyarelisted.2.2Governmentdocuments.2.2.1Specifications,standardsandhandbooks.Thefollowingspecifications,standards,andhandbooksformapartofthisdocumenttotheextentspecifiedherein.Unlessotherwisespecified,theissuesofthesedocumentsarethosecitedinthesolicitationorcontract.INTERNATIONALSTANDARDIZATIONAGREEMENTSSTANAG3456AircraftElectricalSystemCharacteristics(Copiesofthisdocumentareavailableonlineathttp:
/assist.daps.dla.mil/quicksearch/orwww.dodssp.daps.milorfromtheStandardizationDocumentOrderDesk,700RobbinsAvenue,Building4D,Philadelphia,PA19111-5094.)2.3Orderofprecedence.Intheeventofaconflictbetweenthetextofthisdocumentandthereferencescitedherein,thetextofthisstandardtakesprecedence.Nothinginthisdocument,however,supersedesapplicablelawsandregulationsunlessaspecificexemptionhasbeenobtained.3.DEFINITIONS3.1Acronymsusedinthisstandard.Theacronymsusedinthisstandardaredefinedasfollows:
a.ACAlternatingCurrentb.COTSCommercialOff-The-Shelfc.DCDirectCurrentd.DoDDepartmentofDefensee.kVAkilovolt-ampereSource:
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20ZCheckthesourcetoverifythatthisisthecurrentversionbeforeuse.MIL-STD-704F2f.NATONorthAtlanticTreatyOrganizationg.PORPointofRegulationh.RMSRootMeanSquarei.STANAGStandardizationAgreementj.VAVolt-ampere3.2Abnormaloperation.Abnormaloperationoccurswhenamalfunctionorfailureintheelectricsystemhastakenplaceandtheprotectivedevicesofthesystemareoperatingtoremovethemalfunctionorfailurefromtheremainderofthesystembeforethelimitsforabnormaloperationareexceeded.Thepowersourcemayoperateinadegradedmodeonacontinuousbasiswherethepowercharacteristicssuppliedtotheutilizationequipmentexceednormaloperationlimitsbutremainwithinthelimitsforabnormaloperation.3.3ACvoltage.ACvoltageistherootmeansquare(RMS)phasetoneutralvalueforeachhalfcycle.a.SteadystateACvoltageisthetimeaverageoftheRMSvoltageoveraperiodnottoexceedonesecond.b.PeakACvoltageisthemaximumabsolutevalueoftheinstantaneousvoltage.c.Thedirectcurrent(DC)componentoftheACvoltageistheaveragevalueofthevoltage.3.4Aircraftelectricpowersystems.Anaircraftelectricpowersystemconsistsofamainpowersource,emergencypowersource,powerconversionequipment,controlandprotectiondevices,andaninterconnectionnetwork(wires,cables,connectors,etc.).Themainpowerisderivedfromaircraftgeneratorsdrivenbytheaircraftpropulsionengines.Emergencypowerisderivedfrombatteries,enginebleedair,independentauxiliarypowerunits,ramairdrivengenerators,orhydraulicallydrivengenerators.3.5Crestfactor.ThecrestfactoristheabsolutevalueoftheratioofthepeaktotheRMSvalueforeachhalfcycleofthevoltagewaveform.3.6Current.AlternatingCurrent(AC)currentistheRMSvalueforonehalfcyclemeasuredbetweenconsecutivezerocrossingsofthefundamentalfrequencycomponent.DirectCurrent(DC)currentistheinstantaneousvalue.3.7Currentmodulation.Currentmodulationisthedifferencebetweenmaximumcurrentandminimumcurrent.Percentcurrentmodulationistheratioofthecurrentmodulationtotheaverage(meanforDC,RMSofthefundamentalforAC)currentmultip
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