OPTI-UPS SS20K33 User manual

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

AVR

Industrial‐GradeHighEfficiencyA.CVoltageRegulator



USER’SMANUAL



OPTI‐UPSInternationalCorporationreservestherighttomakeengineeringchangesonallitsproducts.Suchrefinements

mayaffectinformationgivenintheinstructions.Therefore,USEONLYTHEINSTRUCTIONSTHATAREPACKEDWITHTHE

PRODUCT.



WARNING:Highvoltagesarepresentinsidethisunitduringoperation.Donotoperatethisunitunless

allcoversareinplace.

Installationandservicingshouldonlybedonebyqualifiedpersonnel.



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

CONTENTS



1‐TheProtectionandMaintenanceofAVR

3

2‐Safetywarnings

4

3‐Descriptionofthesymbolsusedinthismanual

5

4‐Introduction

6

5‐FunctionsIntroduction

7

6‐PreliminarywarningstousetheAVR

7~8

7‐Operatingprocedures

8~9

8‐TheOperationProceduresofMaintenanceByPassSwitch

10

9‐Maintenance&Cleaning

10~11

10‐TroubleshootingGuide

11

11‐Storage

11

12‐Technicalspecifications

12

13‐Machineschematicview/outline

12~19





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1‐TheProtectionandMaintenanceofAVR



1.PleasecleanandmaintaintheAVRperiodicallytokeepfromdustforlastingmachinelife.

2.Pleaseusesoftclothforwiping,andpleasedon’tusesandpaperasdetergent.

3.Pleasecheckeverykindofconnectionwireseverymonthperiodicallytopreventtheloosingor

abrasion.

4.Pleaseplacetheunitonaflatorevensurface.

5.Thisunitshouldbesituatedwithwell‐ventilation,pleaseallowatleast30cmclearancefromtherear

front,leftandrightside,andtheseventilationopeningsofrightandleftfront,andrearlineshould

neverbeblocked.



6.Pleaseavoidthedirectsunshine,rainormoistureplace.

7.Keepingtheunitawayfromfireandhightemperaturetoavoidoverheat.

8.Pleasedon’tplaceanyobjectonthetop.

9.Avoidingtheinstallingplacethatcontainsthecorrosiongas.

10.Operatingtemperatureisbetween0℃~40

℃.



30cm

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2‐Safetywarnings



Fortheuser’sownsafety,thesafetyofdataandthisproduct

readthefollowingsafetyinstructionscarefullybeforeusing

theunit!



‐Thissystemhasbeendesignedtoprovideallthenecessarysafetyconditionsneeded

toprotectelectronicofficeequipmentincludinginformationsystems.Incaseofanyquestions,

refertoyourauthorizedtechnicalservicerepresentative.

‐Inordertoavoidanydamagetotheequipment,itisadvisedtotransportitinits

ownpacking.

‐Intheeventofsuddentemperaturechangessuchasfromcoldtothenormalworkingtemperature,

mistcanforminsidetheAVR.ItisabsolutelyessentialthattheAVRbedrybeforeswitchingiton.

Duetothisreasonwaitforatleast2hoursbeforeoperatingit.

‐Oncedry,makesureyouobservealltheconditionsintheenvironmentsectionofthetechnical

specificationstable,beforeintroducingitintothecircuit.

‐WheninstallingtheAVRitisnecessarytouseaconnectioncableofsuitablediameter.Thepointto

benotedhereisthattheneutral

andtheearthingconnectionsshouldbedoneintheproperway.

‐Placeallthecablesinaproperplacesothattheyarenotsteppedonorgetcaughtintopeoplesfeet.

BeforeconnectingtheAVRtothecircuitmakesureyoucarefullyreadalltheinstructionsand

warningsinthe“MontageandOperatingProcedures“sectionofthismanual.

‐Don’tdropanyforeignmaterials(likeclips,nailsetc...)intotheequipment.

‐Inemergencies(damagetothecabin,frontpanel,ormainsconnections,splashingofliquiddropping

ofanyforeignmaterialsintotheequipment)switch‐offtheAVR,pullouttheplugandinformthe

authorized

servicecenter.

‐TheAVRcanonlyberepairedbytheauthorizedtechnicalservicepersonnel.Anyattempttoopen

andtorepairbytheuseronhisowncouldprovetobedangerous.

‐DonotconnectanyconsumerloadstotheAVR,whichexceeditspowerrange.

‐Readtheinstructions

carefullyinthe“TheOperationProceduresofMaintenanceByPassSwitch”&

“Cleaning”sectionwhencleaningtheAVR.

‐Leaveatleastadistanceof45cmbetweentheAVRandthewallsinordertomaintainadequate

air‐flow.



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3‐Descriptionofthesymbolsusedinthismanual

Thefollowingsymbolshavebeenusedinthismanual.



Thissymbolgivesinformationregardingpointsimportantforuser’sownhealthand

safety,AVRoperationandthesafetyofyourdata.



Thissymbolgivesinformation,warnings,andothersuggestions.



Thissymbolshowstheoperationsthatneedtobeexecuted.



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4‐Introduction

Inputpowerisappliedacrossthemotordrivenvariabletransformerwhichhasa“centertap”that

dividesthevariabletransformerintobuckingandboostingvoltageareas.Thebuck‐boosttransformeris

afixedratioisolationtransformercapableofhighamperesatlowvoltage.Theratioofthebuck‐boost

transformerisdeterminedbytheamountofvoltageneededtobuckorboosttheinputlinevoltageto

maintainthespecifiedoutputlevel.Thebuck‐boosttransformersecondaryiswiredinserieswiththe

loadandtheprimaryisconnectedacrossthevariabletransformer’s“centertap”andbrush

terminals.Dependingonwhichsideofthe“centertap”thevariabletransformerbrushispositioned,

thevariable/buck‐boosttransformersystemwilladdto(boost)orsubtractfrom(buck)theinputline

voltage.Thefurtherthevariabletransformerbrushisfromthe“centertap”themorebuckingor

boostingofvoltagewilloccur.Thekeytotheprovenreliabilityandlongtroublefreeservicelifeofa

VoltageRegulatorisinthecombinationofamotordrivenvariabletransformerwithbuck‐boost

transformertechnology.





InputOutput









Figure1.Singlephaseregulatorblockdiagram



Asshowninfigure1,theonlyactivecomponentinthemainpowerpathofthevoltageregulatoris

thesecondaryofthebuck‐boosttransformer.Thisgivestheregulatortheadvantageofbeingableto

withstandsubstantialcurrentoverloads.Thevariabletransformerbrushes,whicharethemost

vulnerablecomponentinany

variabletransformersystem,arecompletelyisolatedfromoverload

conditionsbythebuck‐boosttransformer.Duetotransformerinefficiencyaboverateddesign,the

amountofcurrentthatthebuck‐boosttransformercaninduceacrosstoitsprimarywindingandinto

thevariabletransformercircuitisdramaticallydecreasedasregulatoroverload

currentincreases.

 Thecontrollermonitorstheregulator’soutputvoltageandthenusesthesefeedbacksignalsto

determinedrivecommandsforthevariabletransformermotorinterfacecircuit.Thecontrolleris

designedtoadjustthemotorizedvariabletransformertoprovidea+/‐1~2%orbetteroutputvoltage

regulationovertheentireinputvoltagerange.



5‐FunctionsIntroduction

M Controller

Buck-Boost transformer Variable transformer

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

MCCB1:Moldcastcircuitbreaker

Mainpowerswitch



MCCB2:Moldcastcircuitbreaker

Maintenancebypassswitch.

PleaserememberthatMCCB2isusedonlyforservicetechnician.

Non‐maintenancepersonnelmustnotopenittouse,otherwise,AVRcouldbebreakdownbecauseof

improperoperating.



Onpushswitch(redbutton):

Controllingtheoutput(On)action.



Offpushswitch(greenbutton):

Controllingtheoutput(Off)action.



Off(0):AVRnoaction,sotheoutputhasnovoltagestabilityfunction.

On(1):AVRaction,sotheoutputvoltageissteady.



Voltageandcurrentindicator:(Thereisnovoltage&currentmeterindicationbelow50KVA).

Voltagemeter(V)indicatestheoutputvoltage.

Voltageselectorindicatesperphase(UVW)withNtheoutputvoltage.



6‐PreliminarywarningstousetheAVR



AutomaticVoltageRegulator(AVR)areusedtoprotectthesensitiveloadsfromtheunstablemainsand

toprovideproperoperatingoftheload.

Relatedpointsforhumanhealtharementionedin“SafetyWarnings”partofthismanual.

Inthispart,thesepointswillrepeatedtogiveinformationabouttheconnectionsofAVRandtheload.



•WheninstallingtheAVRtousecablewithimproperdiametercanbedangerousforuser

healthandsafetyoftheunit.



•Earthcableshouldbechosenconcerningthecurrentcapacity,whichiswrittenonthelabelon

thefrontpaneloftheAVR.Allunitsearthconnections,whichareconnectedtoAVR,should

bedonewiththisearthcable.Withoutearth,connectionorunprovedearthconnectedunits

aredangerousforuserhealthandhavehighriskofelectroniccircuitboardfaults.





Theoperationenvironmentandcableconnectionplaysveryimportantroletothe

functionofAVR.ItwillcauseverydirectandcriticaleffecttotheAVR’sMTBF.Therefore

- 8-

itisessentialtofollowtheinstructionsofinstallationandcableconnection.



Requirementofoperationenvironment：

TheoperationenvironmentplaysavitalroleforanAVR,boththefunctionandtheenduranceofAVR

willallbeeasilyaffecte diftheenvironmentdoesnotmeetitsrequirementlistedbelow：

1.Ambienttemperature：0℃~40℃.

2.Keepofftheoilandthesalt.

3.Keepoffdust,fluffandmetaldust.

4.Avoidinstallingonavibratorymachine.

5.IfAVRisinstalledinsideamachineorapanelcabinet,theventilationisveryimportant,thebestis

toaddcoolingfan.

6.DonotplaceanythingontopoftheAVR.



CableConnection

1. The installation standard varies with the different models, different capacities as well as the

different voltage, please refer to the appropriate installation standard provided in this manual to

installyourAVRandputattentiontotherightcablesusedforinstallation.



2. PleaseuseaseparateACinputBreakerforAVRandacloserdistancetotheACpower

isrecommended.

3. Be sure to check the right polarity while connecting cables to terminals, no matter the AVR is a

singlephaseorthreephase.

4. TheutmostimportancetoinstallathreephaseAVRistomarksureoftherightphaseorder.

5. Forsafelyconsideration,itisstrictlyforbiddentoinstallwithACpower“On”status.

6. Cableassemblingmustbecompletelyinaccordancewiththeelectricianrules.



7‐Operatingprocedures

 CheckiftheAVRhasbeensubjectedtoanydamagebeforeunpackingit.



Ifyounoticeanydamagethencontacttotransportfirm.

CheckifallthesparepartshavebeensuppliedwiththeAVR.



Checkingtheinputpoweriscorrectornot,thenclosingallswitches(includingevery

load).



Deliveredpackincludes:

- 9-

•AutomaticVoltageRegulator

•UserManual



Bythehelpofrollingwheels,carrytheunittoasuitablelocationtoinstallit.

PlugtheinputpowercableofAVRtoproperlyearthedmains.

Checktheconnectionsbeforechangingthepositionoftheinput,output,andbypassswitchesto

suitablepositions.



ProperoperationproceduremakesAVR function moresmoothand preventfromvarious unnecessary

troubles.



Beforeswitchon(initialstart)

InordertoperfecttheAVRnormalfunction,pleasecheckthefollowingsinadvance:



makesureMCCB(1)、MCCB(2)Moldcastcircuitbreakerisin“O ff”status.

makesurealloftheload’sMoldcastcircuitbreakerarein“Off”status.

makesureallthecablesarefixedtightintheterminalanddonotcomeloose.

checkwithamulti‐meterfortherightACvoltagetosuitforAVR.

 Afteralltheabovearewellconfirmed,pleasetak ethefollowingstepstoswitchOnandOff:

1. toswitchon:

□SwitchMCCB(1)Moldcastcircuitbreakerupto“On”position.

□Pushingtheredbutton“On”onfrontpanel

□ If the red buttonindicatoris lighted,meaning the O/P voltage metershowing the rightoutput

voltagevalue.

□UsingTureRMSvoltagemetertomeasuretheO/PN,UVWontheterminalboard.Iftheoutput

voltageiscorrect,AVRisactivatedsuccessfully.

□pleasenottooverloadyourAVR



2. toswitchoff:

□CloseMoldcastcircuitbreaker“O ff”ofeveryload.

□Pushingthegreenbutton“Off”onfrontpanel,althoughthereisnooutputvoltage,theAVRis

stillinaction.

□SwitchMCCB(1)Moldcastcircuitbreakerto“Off”position.





8.TheOperationProceduresofMaintenanceByPassSwitch



- 10-

 MaintenanceBy‐pass:



□CloseMoldcastcircuitbreaker“O ff”ofeveryload.

□Pushingthegreenbutton“Off”onfrontpanel,althoughthereisnooutputvoltage,theAVRis

stillinaction.

□SwitchMCCB(1)Moldcastcircuitbreakerto“Off”position.

□SwitchMCCB(2)Moldcastcircuitbreakerupto“On”position.

□UsingTureRMSvoltagemetertomeasuretheO/PN,UVWontheterminalboard,iftheoutput

voltageiscorrect,AVRisby‐passsuccessfully.



9‐Maintenance&Cleaning



DothecleaningduringtheinputMoldcastcircuitbreakerMCCB(1)andmaintenance

by‐passMCCB(2)switchisin“Off”positionforhumanhealth.



Donotusedetergentsoranycleaningmaterialthatmaydamagethecabinetsurfaces.



DonotletanyliquidgetintotheAVR.



Ensurethattheairholesareopen.



TheAVRbodycanbewipedwithacleananddrycloth.



ChecktheareasurroundingtheAVR.Ensuretheareaisnotcluttered,allowingfree

accesstotheunit.



Ensuretheairintakes(ventsonthefrontdoors)andexhaustopening(onrearoftheAVR

cabinetsections)arenotblocked.



Toensuremaximumlifeoftheequipment,thefollowingshouldbepartofanannualmaintenance

program.WarningDe‐energizeunitbef or eperformingmaintenance.Voltagesarepresentinsidethisunit

whichcancauseinjury.Therefore,onlypersonnelqualifiedtoserviceelectricalequipmentshould

performmaintenanceonthisunit.



‐Vacuum the voltageregulatorinsideandouttoremoveaccumulateddirt,whichcouldleadto

overheatingorinsulationfailure.



‐Tightenallelectricalconnections,particularlyallpowerwiringto ,andin,theunit.



‐Inspectallvariabletransformerbrushesandcommutatorsforsignsofwearorpitting.Replaceas

required.Donotat tempttocleanacommutatorwithanabrasivesuchassandpaperorafile.Thiswill

ruinthesoftpreciousmetalplatingonthecommutatorandwillshortenthelifeoftheunit.Itis

normalforcommutatorstobecomeblackduetocarbonbrushtracking.Ifacommutatoristobe

cleaned,usedenaturedalcoholandasoftcloth.

- 11-



‐Inspectthevariabletransformerdrivebelts,sprockets,gears,cams,etc.forsignsofslippageorwear

andadjustasrequired.



‐Checkthevariabletransformerradiator(s)(thediecastpartthatholdsthebrushassembly)forsignsof

slippage,andseeifallbrushesdrivenbythesamemotorarealignedwitheachother.Thealignment

oftheradiatorandbrushesdependsonthesetscrewsthatholdthevariabletransformer centertube(s)

totheshaftandthesetscrewsthatholdtheradiatortothecentertube.Adjustandtightenasneeded.



‐LubricationoftheAVRisnotrequiredsinceithasbeenlubricatedatthefactoryforitslifetime.



10‐TroubleshootingGuide



IfanyerrorsoffaultsareobservedontheAVR,makesureyoucheckthefollowing

pointsbeforeinformingtheauthorizedtechnicalservice:



•Doesthedistributionpanelhavemainsconnection?

•Havetheprotectionfusesblownoff?



InformingtheauthorizedserviceabouttheAVR:

•Informationfoundontheproductlabel(model,no)

•Describetheproblemindetail.



 

11.Storage



Theunithastobestoredinadryplacebetween0℃~90℃.



- 12-

12.Technicalspecifications

 

InputCharacteristics 

Capacity:

VoltageRange: 

Phases: 

FrequencyRange: 

Terminationterminalblock

20KVA

380Y/220Volt,+25%to‐25%at50Hzforregulation.

Threephases‐4wire,Wyeconnection(R,S,T,N,G)

47‐53Hzfor50Hzmodels+/‐3Hz

terminalboard

OutputCharacteristics



Voltage:

Phases:

VoltageRange:



FrequencyRange:



LoadRegulation:

HarmonicDistortion:

Efficiency:

Overload:

Waveform:

InsulationResistance:

Technology:



By‐passSwitch

Cooling:

Termination

380Y/220Volt

Threephases‐4wire,Wyeconnection(U,V,W,N,G)

Regulatedto±1~2%ofnominalvoltagewithaninputvoltagerangeof+15

to–15%

50Hz,forevery1%

changeininputfrequencytheoutputvoltagewillchangeby

1%inthesamedirection.

5%,noloadtofullload

non

97%atfullload.

For1minutes100%,for30minutes125%,for60minutes100%.

Sinewave

5megaohmsfromwindingtocoremeasuredat500Vdc

Thistechniqueusesthecombinationof

amotordrivenvariabletransformerwith

buck‐boosttransformertechnology.

inputpowerdirectlytoload,bypassingthevoltageregulator.

fanassisted

terminalboard

Environmental 

AudibleNoise:

AmbientTemperature:



OperatingAltitude:

OperatingHumidity:

HeatRejection:



Lessthan65dBAat1.5metre

0°to40°COperating,

10°to90

°CStorage

3,000metrewithoutderating

90%relative(non‐condensing)

Atfullload,10%ofVAratingx3.41.



13‐Machineschematicview/outline

[Front view]

[Right side view]

[Isometric view]

A A

B B

C C

D D

E E

F F

Page 1

A A

B B

C C

D D

E E

F F

Lifting lugs

Fan

Variable transformer

Fan

Buck-boost transformer

Push botton

Control board

Enclose mounting holes

Main MCCB

Fuse holes

Magnetic contact

Bypass MCCB

MOV

Isoation transformer

Conduit entrance

Ventilator filter unit

Waterproof flat lift-and-turn latch

Input/Output teminal board

Page 2

A A

B B

C C

D D

E E

F F

R S T N G

V W N G

INPUT OUTPUT

Page 3

Input/Output terminal board

Cable

Main MCCB On

Main MCCB Off

Bypass MCCB On

Bypass MCCB off

A A

B B

C C

D D

E E

F F

Main MCCB

Bypass MCCB

Page 4

OFF

A A

B B

C C

D D

E E

F F

Fuse

F1 F2 F3

Page 5

A A

B B

C C

D D

E E

F F

V PHASE W PHASEU PHASE

AVR control board

Output voltage adjust

Page 6

A A

B B

C C

D D

E E

F F

MOV

Page 7

A A

B B

C C

D D

E E

F F

Filter x3 PCS

Maingbod

Note : Clean the ventilator occasionally to maintainits normal function

Use a vacuum cleaner or compressed air to clean the filter

Page 8

Hole plug x4PCS

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OPTI-UPS SS20K33 User manual

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