Daiichi Electronics ASY-96 - Description; Features of Product; Functions of Product

ASY‑206‑077
4
1.Description
Thisisacontroldevicetocarryoutasynchronizingclosingsafelyandsmoothinoperationofgenerators
inparallelconnections.Attimeofparallelconnection,eachvoltageandfrequencyarecheckedandwhen
thedifferenceiswithinagivenvalue,closingsignalisgiventocircuitbreakeraheadofthesynchronizing
point,accountingonadvancebreakingtime,sothatthecircuitbreaker(CB)canbeclosedatanexact
synchronizingpoint.
Thisunithasalsofunctionsofsynchronismchecksignalandsynchronizingdetectingdisplay.
2.Featuresofproduct
(1) Highquality,highreliabilitybyCPUadoption.
(2) Thisproductislightweightandcompact.
(3) Displayisabundant(Measurementdisplay：3points.Statusdisplay：10points).
(4) Simplesettingfromfrontside.Numeroussettingvalues,yetverysimpleinsetting.
(5) Synchronizingdetectionbysingle‑phasecircuit,bothinbusinputandgeneratorinput.
(6) Automatic/Manualsynchronizationswitchingfunctionisprovided.
(7) Reversepowerpreventivefunctioniseffectiveattimeofrecoveryofthereceivingpowerby“SLOW”
sideclosingcommand(F
B ＞F G ).
3.Functionsofproduct
(1) Voltagebalancingfunction.
Controlpulseoutputisgivensothatbusvoltage(V
B )andgeneratorvoltage(V G )canbestayedwithin
agivenrange.(60R，60L)
PulsewidthisVpwsetvalueandpulseperiodbecomesVpintsetvalue.
(2) Advancingfunction.
Controlpulseoutputisgivensothatbusfrequency(F
B )andgeneratorfrequency(F G )canstaywithin
agivenrange.(15R，15L)
PulsewidthisFpwsetvalueandpulseperiodbecomes"1/inputfrequencydifference".
Itoutputsat180°ofphasedifference.
(3) Synchronismchecksignalfunction.(±15°).
Whenvoltagedifference(ΔV)andfrequencydifference(ΔF)staywithinagivenvalueandphase
differencewithin±15°,contactsignaloutput.Incaseofautomaticsynchronizationclosing,synchronizing
closingcanbedonemoresafelyincombinedusewithcircuitbreakerclosingsignal(25)underseriesconnection.
(4) Synchronizingclosingfunction.
Aftervoltagedifference(ΔV)betweenbusandgeneratorandafterfrequencydifference(ΔF)betweenthem
becomewithinagivenvalue,circuitbreakerclosingsignal(25)isoutputaheadofsynchronizingpoint,
accountingonadvancetimeofclosing,sothatcircuitbreakercanbeclosedatsynchronizingpoint.
“ON”timeofclosingsignal(25)istheadvancetimeplus200ms.Afteraclosingsignaloutput,incasethere
isnophaseshift(10°)for3seconds,itbecomesasynchronizingsuccess.ItbecomesanENDdisplayand
allcontrolisstop.Incaseaphaseshift(10°)isin3seconds,itbecomesasynchronizingclosingfailure.
<Cautions>Fromchangeofphasedifference,thetimetoasynchronizingpointiscalculatedanda
synchronizingclosingsignalisoutputted.Forthisreason,ifafrequencydifferenceis
0.04Hzorless,aninputsignalisnotoutputtedevenifphasedifferenceis0°(inphase).
(5) Alarmfunction.
Whensynchronizingclosingisfailed3timescontinuously,alarm“LED”turnsonabout3secondsafterwards
andcontactsignalisoutput.Afteralarmisoutputted,whenthereisacontrolstart,ΔF,ΔV,and
±15°controlactionarecontinued.Acircuitbreakerclosingsignal(25)isnotoutputted.
Synchronizingclosingfailureisintheconditionthatthephasedifferencebetweenbussideand
generatorsideexceeds10°.
Alarmisreleasedatnovoltageorsynchronizingstart(bothofautoandmanual)is“OFF”.
(6) Settingfunction.
Voltagedifference,frequencydifference,advancetime,pulsewidth/cycleofeachcontrolcanbeset.