Qualitrol DGALT1-11110 User manual
DRAFT DGA-LT1 Installation Guide
www.qualitrolcorp.com
On-Line Transformer Monitor
Installation Guide - Model DGA-LT1
December 2018
Legal
www.qualitrolcorp.com
Informationinthisdocumentissubjecttochangewithoutnotice.ThisdocumentisprovidedtopurchasersofQualitrolproductsfor
useintheinstallation,operationandservicingofsuchproducts.Nootheruse,noranyreproduction,distributionorthemakingof
anyderivativesofthisdocumentisauthorized,withouttheexpresspriorwrittenpermissionofQualitrolCorporation.
Qualitrolendeavorstoensuretheaccuracyandqualityofitspublishedmaterials;however,nowarranty,expressedorimplied,is
provided.Qualitroldisclaimsanyresponsibilityorliabilityforanydirectorindirectdamagesresultingfromtheuseofthe
informationinthismanualorproductsdescribedinit.Mentionofanyproductorbranddoesnotconstituteanendorsementby
Qualitrolofthatproductorbrand.
ThisdocumentwasoriginallycomposedinEnglishandwassubsequentlytranslatedintootherlanguages.Thefidelityofsubsequent
translationscannotbeguaranteed.IncaseofconflictbetweentheEnglishversionandanotherlanguageversion,theEnglishversion
takesprecedence.
©2018QualitrolCorporation.1385FairportRd,Fairport,NY14450.Allrightsreserved.Informationsubjecttochangewithoutnotice.
QUALITROL,DGA‐LT1,QualConnexandQGatewayareregisteredtrademarksofQualitrolCompanyLLC
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DRAFT DGA-LT1 Installation Guide
2
ProductOverview
TheDGA‐LT1isaremotely‐deployedtransformermonitorwhichcanbesafelyinstalledontoanenergizedor
non‐energizedtransformertodetectandmeasuredissolvedhydrogenfoundinanelectricalpower
transformer‘sinsulatingoil.Themonitorisdesignedandconstructedtooperateinenvironmentalconditions
inPowerPlants,SwitchyardsorSubstations.
TheDGA‐LT1isdirectlymountedtoanexistingvalveonthetransformerandcirculatestransformeroilwithin
ittoprovideacontinuousreadingofhydrogeninppm.DatacanbeviewedintheQualConnex®web
applicationtotrackthehydrogenppmlevelsovertimeandcompareagainstuser‐definedcautionandalarm
settings.
TheDGA‐LT1isabatterypoweredwirelesssensorthattransmitsencryptedrawsignalsviaRFfrequencytothe
QGatewaythatareusedforcalculatinghydrogenconcentration,moistureconcentrationandtemperature.
TheDGA‐LT1measureshydrogen(H2)withoutcross‐interferencefromothergases.Hydrogenisformedunder
allknownthermalfaultconditionsinthetransformerandisoneofthefirstgasestobegenerated,makingit
anexcellentearlyindicatorofabroadrangeoffaulttypes.
TheDGA‐LT1isdesignedtobeinstalledandconfiguredbytheend‐user.Configurationofthemonitor’salarms,
settingsandoptionsisaccomplishedusingtheQualConnexwebinterface.
DRAFT DGA-LT1 Installation Guide
3
SystemDescription
TheDGA‐LT1providesareliablemeansofmonitoringgas(e.g.,hydrogen)concentration,temperature,and
moistureconcentrationinthedielectricinsulatingoilofelectricalequipmentatalowercostthantypical
devicesandalsoavoidstheadditionalmaterialandlabourcostsrelatingtoinstallationofpowerand
communicationscables.Thewirelesssensorisbatterypoweredandtransmitsdatawithouttheneedfor
additionalpowerorcommunicationswires,cablesorconduits.
Awebbasedcomputerapplication,providesamonitoringdashboardandnotificationsystemtoensurethat
electricalassetsincludingtransformersacrossawidegeographicalareacanbequicklyreviewedtoidentify
transformersshowingtrendsofincreasingriskoffailurewhilealsoreceivingautomatednotificationsbasedon
alertthresholds.
Thewirelessdissolvedgasanalyzerconfiguredforeasyconnectiontotransformersandotherelectrical
equipmenthavinginsulatingoilandincludessensorsformeasuringhydrogengaslevels,temperature,and
moisture.Asillustratedanddiscussedfurtherbelow,theanalyzerthreadsintodrainvalveofthetransformer.
Thesensorincludesanopenbodythatisexposedtotheoilandhasahydrogensensitivechemochromic
assemblyintheopenbody.Thecolorofthechemochromicassemblychangeswhenexposedtohydrogen.
Additionally,theanalyzerincludessensorsthatdetectthetemperatureandmoistureconcentrationinthe
bodyoftheelectricalequipment.
Theanalyzerfurtherincludesacolorsensorthatmeasuresthecolorofthechemochromicassemblydueto
changesinthehydrogenconcentrationintheinsulatingoil.Theanalyzersendtheencryptedcolor,
temperature,andmoisturemeasurementsthroughacommunicationsnetworktoremotemonitoring
equipment,suchasacomputerserver.
Warranty
QualitrolwarrantsitsGoodstobefreefromlatentdefectsinmaterialsorworkmanshipforthedurationofthe
monitoringcontractinitiatedatthedateofshipment.Additionaldetailsontermsandconditionsareprovided
inthesignedagreement.
OperatingEnvironment
TheDGA‐LT1isdesignedtooperatewithinthefollowingoutdoorconditions:
AltitudeRange‐2000to5,000ft.
HumidityRange5%to95%
AmbientTemperatureRange‐40°Cto+65°C
OilInletPressure‐20psigto20psig
OilInletTemperature‐40°Cto+105°C(temperatureatdrainvalve)
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DRAFT DGA-LT1 Installation Guide
5
MonitorInstallation
CAUTION:DonotattempttoinstallyourDGA‐LT1On‐LineTransformerMonitoruntilyouhavereadandfully
understandtheproceduresoutlinedinthisdocument.
InstallationoftheDGA‐LT1consistsofthefollowing:
SitePreparation
MountingtheMonitor
MountingtheGateway
BleedingAirfromtheMonitor
Configuration
SitePreparation
NOTE:Qualitrolrecommendsaminimumsizeof1”forthetransformeroilsupplyvalveandaminimumof3”vertical
clearancebetweenthevalvecenterlineandthetransformerfoundationforproperinstallationspace.
Ensurethefollowingpriortomountingthemonitor:
AnadequatevalvelocationformountingtheDGA‐LT1monitorhasbeenidentified
Transformerisoil‐filledandabaselineDissolvedGasAnalyzersamplehasbeentakentoprovide
baselinelevelsforHydrogenconcentrationandOxygenconcentrationforuseinconfigurationofthe
system
Allshippeditemshavebeenlocated
ThefollowingtoolsarerequiredforinstallationoftheDGA‐LT1monitor:
Adjustablewrenchand/orpipewrench
Teflontapeandpipe‐threadsealant
Containertocollectoilduringinstallation
Notethatinstallationofthesensorsandgatewayshouldtakeplacefromtransformerclosesttothecellular
gatewaylocationoutwardstoensurethatacommunicationpathhasbeenestablishedforcommissioningof
eachsensor.
DRAF
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Mounti
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DRAFT DGA-LT1 Installation Guide
8
CanadianComplianceStatement
Thisdevicecontainslicense‐exempttransmitter(s)/receiver(s)thatcomplywithInnovation,ScienceandEconomic
DevelopmentCanadalicense‐exemptRSS(s).Operationissubjecttothefollowingtwoconditions:
(1)Thisdevicemaynotcauseinterference.
(2)Thisdevicemustacceptanyinterference,includinginterferencethatmaycauseundesiredoperationofthe
device.
L'émetteur/récepteurexemptdelicencecontenudansleprésentappareilestconformeauxCNRd'Innovation,
SciencesetDéveloppementéconomiqueCanadaapplicablesauxappareilsradioexemptsdelicence.L'exploitation
estautoriséeauxdeuxconditionssuivantes:
(1)L'appareilnedoitpasproduiredebrouillage;
(2)L'appareildoitacceptertoutbrouillageradioélectriquesubi,mêmesilebrouillageestsusceptibled'en
compromettrelefonctionnement.
NOTE:Afind’assurerlaconformitéauxexigencesdelaFCCenmatièred’expositionauxradiofréquences,aucune
modificationdel’antenneoudel’appareiln’estautorisée.Toutemodificationdel’antenneoudel’appareil
pourraitavoirpourconséquencequel’appareildépasselesexigencesenmatièred’expositionauxradiofréquences
etannuleledroitdel’utilisateurdefairefonctionnerl’appareil
FCCComplianceStatement
ThisdevicecomplieswithPart15oftheFCCRules.Operationissubjecttothefollowingtwoconditions:
(1)Thisdevicemaynotcauseinterference
(2)Thisdevicemustacceptinterference,includinginterferencethatmaycauseundesiredoperationofthedevice.
ThisequipmenthasbeentestedandfoundtocomplywiththelimitsforaClassBdigitaldevice,pursuanttopart15
oftheFCCRules.TheseLimitsaredesignedtoprovidereasonableprotectionagainstharmfulinterferenceina
residentialinstallation.Thisequipmentgenerates,usesandcanradiateradiofrequencyenergyand,ifnotinstalled
andusedinaccordancewiththeinstructions,maycauseharmfulinterferencetoradiocommunications.However,
thereisnoguaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoescause
harmfulinterferencetoradioortelevisionreception,whichcanbedeterminedbyturningtheequipmentoffand
on,theusersisencouragedtotrytocorrecttheinterferencebyoneormoreofthefollowingmeasures.
‐Reorientorrelocatethereceivingantenna
‐Increasetheseparationbetweentheequipmentandthereceiver
‐Connecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthereceiverisconnected
‐Consultthedealeroranexperiencedradio/TVtechnicianforhelp
Anychangesormodificationstothisunitnotexpresslyapprovedbythepartyresponsibleforcompliancecould
voidtheuser’sauthoritytooperatetheequipment.
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