XITRON XT2640 - Typical Triple Vpa Applications; Mechanical (Motor;Generator) Applications

XT2640OperatingManual 13July2016 Page19of187
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8.5 TYPICALTRIPLEVPA APPLICATIONS
ExamplesoftripleVPAapplicationsasshowninthediagrambelowinclude–
EmergencyLightingBallasts(mosttypes)
StandbyorBackupPowerSupplies(ACorDC)
TherearealsoothertripleVPAconfigurationswhicharenotshownhere.Asexample–
IfafacilityhasabackuporPVsourceofpower,aninternalpowerdistribution,andalsoaccesstoanetworksupplythen
threeVPAscanbeused,onemeasuringeachofthese.InthiscaseyoushouldnotethattheXT2640canalsoseparately
integratetheboughtandsoldpowerforthenetworkpowersource.
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 EachVPAhasthesamecapabilitiesandareindependentlyconfiguredasforsingleVPAapplications(exceptonlyasingle
oscilloscopeinoneVPAisallowed).
 EachVPAcanbeconfiguredasNx1ø,2ø3w,3ø3w(2ch),3ø3w(3ch)or3ø4wlimitedbythetotalnumberofchannels
installed.
 Efficiencyandpowerlosscanbemeasured,overallandforeachintermediatestage.
 Fortheexampleshownabove,thetotalchargeanddischargeAHrforthebatterycanbemeasured.
 TheVPAsmaybeconfiguredaseither–
Totallyindependentandhavingtotallydifferentfrequencycontentsignalstoeachother.
Or,havetotallydifferentfrequencycontentsignalsbutmakemeasurementsovertimeswhicharesynchronized
toeachother.
Or,havethesamefrequencycontentsignalsandmakemeasurementsoverexactlythesameperiodsoftime(the
oscilloscopecapturesthesignalsinbothVPAsinthiscase).
8.6 MECHANICAL(MOTOR/GENERATOR)APPLICATIONS
IfaMTtypechannelisinstalledandconfiguredintheCH4locationthenitcanbeusedformechanicalmeasurementsinadditionto
thepreviouslydescribedelectricalmeasurementsperformedinVPA1toVPA3.Themeasurementofmechanicaldatacanbemade
independentlyofelectricalmeasurements,orsynchronizedtoaVPA,orallVPAsandthemotor/generatormeasurementsmayallbe
synchronizedtogether.
Seesection12.4.3forconfiguringtheXT2640formotor/generatormeasurements.
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XT2640
POWER
SOURCE
AC
to
DC
VPA
1 to 4
channels
LOAD
VPA
1 to 4
channels
DC
to
AC
BATTERY
VPA
1 to 4
channels