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1、“设备制造质量检验规程PowerTransformer1、SGSRefNo.:30Rev.:0Page:lof8INSPECTIONGIDELINESPOWERTRANSFoRMERDate:26/03/041NSPECTIONGUIDELINESPOWERTRANSFORMEROForApproval26032022J.C.BrottonB.TremainB.TremainJune2022Rev.DescriptionDatePreparedCheckedApprovedDateSGSRefNo.:30Rev.:0Page:2of8INSPECTI0NGUIDELINESPOWERTRANS
2、FORMERDate2、:26/03/04CONTENTSlPURPOSE2SCOPE3PROCEDURE4DOCUMENTS5lNspectionprocess6Shipping7powertransformerdataDossiersinspectionchecklistsgsRefNo.：30Rev.：OPage：3Of8INSPECTI0NGUIDELINESPOWERTRANSFORMERDate:26/03/041.0PURPOSEThisinstructioncoverstheinspection,testandverificationactivitiesrequ3、iredto
3、validatethesupply,manufactureandtestofpowertransformers.2.OSCOPEThisinstructioncoversallnecessarystagesintheproductionofpowertransformersfromtheexaminationofcertificationfromprocurementsourcestothefinalinspection,preservationandpackingtodespatchtosite.Althoug4、hthemethodologyincompilingthisinstructi
4、onistosystematicallyprogressthroughtheconstruction,experiencedinspectorsmayinterprettheintentoftheinstructiontoaccommodatelocalornovelpracticesortoutilisetheinstructionforaoneoff,oralternativedesign,thedesignhavingbeenappr5、OVedbytheclient.Anysuchvariationsshouldbenotedintheinspectorsreport.3.0PROCE
5、DURE3.IGENERALThisinstruction,togetherwithitsassociatedchecksheet,maybeusedonanyorderorcontract.ltisintendedtoactasaguidetotheinspectorinthecourseoftheinspectorprogramme.Anypartofthe6、documentmaybeinvokedandthesectionstobeusedandthelevelofinspectionrequiredwillbespecifiedonthechecksheet.AIItestsandi
6、nspectionswillbecarriedoutagainstapproveddrawings,purchaseorderspecifications,purchasersorcompanystandardszandwithinthepracticesandrulesofthe7、country,stateorprovinceandanygovernmentdecreesjaws,ordinanceorregulationthatmayapply.lfanyconflictorcontradictionsbeapparentinanyoftheabovezthenthemoreOnerou
7、srequirementwillapplyunlessthepurchaserorclientdirectsotherwiseinwriting.3.2REFERENCEDOCUMENTSApplicablec8、odesandSpecifications.DesigncodePurchaseorderspecificationPurchasersstandardsApproveddrawingsSGScompanystandards4.0DOCUMENTSTOBERECEIVED/AVAILABLEATINSPECTIONPurchaseorderorcontractinspectionan
8、dTestPIanDataSheetApproveddrawings,(arrangements,schematics,wiring,singleline)Su9bassemblydrawingsand/orpartslistsMaterial/partsCertificatesWeIdproceduresandprocedurequalificationrecords(ifapplicable)PowerTransformerTestProceduresCaIibrationrecordsfortestingandmeasuringequipmentSGSRefNo.:30Rev.:0Pag
9、e:4of8INSPECTI0NGUIDELINESPOWERTRANSFORMERDate:26/03/010、4Preparationandpainting/finishingprocedurepreservation,packingandshippingprocedureSpares/operatingmanualsSupplylist(packinglist)5.0INSPECTIONPR0CESS5.!MATERIALANDANCILLARYITEMS5.1.1REVIEWOFCERTlFICATIONOriginaIorauthenticatedcopiesofmillcertif
10、icateswillbeavailableatmanufact11、UrerspremisesJheseshouldbeexaminedforcompliancewithspecificationsand,whereappropriate,drawings.Thereviewwillinclude:MakersnameandlocationCertificatenumberMaterialSpecificationHeatorcastnumberChemicalcompositionMechanicalpropertiesHeattreatmentconditionSurfacefinishS
11、t12、ructuralobservations,notabledefects.5.1.2SUBASSEMBLY/INSTRUMENT/METERCERTlFicATIONPrincipaIancillaryitemswillbesupportedbytestcertification,or(asaminimum)certificatesofconformity.Thecontentofcertificationshouldbeappropriatetotherequiredscopeoftest.lnstrumentswillbesuppo13、 rtedbyinstrumentcalibr
12、ationrecordszwhereappropriate.5.2ADDITI0NALSPECIALREQUIREMENTSMayapplyonspecialrequirements,checktoensurethatcontractrequirementshavebeenmet.5.SREPORTINGReportingonmaterials/ancillaryitemsmustinclude:ConfirmationofsatisfactorydocumentreviewRecordof14、 theendorsementofcertificatesreviewed/witnessedRe
13、cordofallnonconformitiesRecordoftestswitnessedandtheresult5.4PRE-TANKINGINSPECTIONThisinspectionshouldonlybecarriedoutbySGSifsorequiredbytheclient.SGSRefNo.:30Rev.:0Page:5of8INSPECTI0NGIDELINESPOWERTRANSFORMERDate:15、 2603045.4.1VISALINSPECTIONVisuallycheckFabricationandcleanlinessofalltankareasando
14、fformersandframesCorrectnessofwindings,terminations,insulation,spacingandgeneralconstructionFreedomfromdamage(withparticularattentiontoinsulation),ContaminationandforeignobjectsManually16、 checksecurityofwedges5.5CONSTRUCTIONCHECK(TRANSFORMERTANKED)5.5.1VISUALANDDIMENSIONALCheckgeneralconditionCheck
15、nameplateCheckoutlinedimensions,interfacedimensionsandclearancesandOtherspecifieddimensions5.5.2GENERALARRANGEMENTCHECKCheckthatallinstruments,terminalboxes,co17、 、mpartments,controlSWitCheS,etc,areCorrectlyratedandarecorrectlyIocatedzWithspecifiedlabelling5.5.3WINDINGRESISTANCEMEASUREMENTMeasurethe
16、resistanceofallwindings,withwindingtemperatureatrecordedambient,usingamilli-ohmeter.5.5.4MEASUREMENTOFRATIOSCheckprimarytosecondarywindi18、 ngratios,foreachphase,foralltappings,usingaratiometer.5.5.5TEMPERATURERISETESTThetransformerissubjectedtofullloadcurrentatratedselected,withmonitoringofoiltempe
17、rature(lowerandupper);coolingairtemperaturemeasuredbyvoltage(variousloading methodsmay apply),with“normaltap19、 atIeast3thermometersinliquidprovidingatimeconstantof2H,placedat1to2metresfromthecoolingsurfaceforAirNatUraICOoling(for“AirForCecrCOOling,thethermometersshouldbewithintheairinputflow,at1to2
18、metres).Conditionsaremaintaineduntiloiltemperaturestabilises(generally20、Specifiedaslessthan3Crisein1hour).Windingtemperaturesarethenascertainedusingtheresistancemethod:T2=R2/Rl(235+Tl)-235forCopperWhereRlisthecoldresistanceandR2istheresistance,withcoolingcurvecorrectionsapplied,afterswitchingoff.5.
19、6LOSSESMEASUREMENT5.6.1LOADLOSS(COPPER21 、LOSS)SGSRefNo.:30Rev.:0Page:6of8INSPECTI0NGIDELINESPOWERTRANSFORMERDate:26/03/04Shortinglinksareapplied(eithertotheprimariesortothesecondaries,dependantontestsupplyvoltages).Voltagesupplyisappliedtotheopposingwindingsandincreaseduntilratedcurrentisachieved.I
20、nputand22 、outputpowersaremeasuredandlosscalculated.5.6.2N0LOADLOSS(IRONLOSS)Ratedvoltageisappliedtoprimariesorsecondaries,withtheopposingwindingsopenCircuitJnputandoutputpowersaremonitoredandlosscalculated.5.6.SEFFICIENCYEfficiencyiscalculatedfromthelosses5.7IMPULSETESTINGI23、mpulsetestsmaybespecif
21、iedformajorprojects(andfortypetests).Refertoclientsrequirements.5.7.1INDCEDOVERVOLTAGEWITHSTANDTEST(OVERPOTENTIALTEST)Therearethreemethods,dependentonwindingcategorycovering;5.7.2DIALECTRICTESTSTestrequirementsvarywithwindingcategory.5.7.3SEPARA24、TESOURCEVOLTAGEWITHSTANDTESTAsinglephaseACvoltageofp
22、owerfrequency(notlessthan80%oftheratedfrequency)isapplied.Peakvalueismeasured.Thepeakvaluexsq.rt.2=testvalue.Thevoltageisgraduallyincreasedfrom1/3valueandsustainedfor60seconds.Thetestisappliedbetweeneachwi25、ndingandtheterminalsofallOtherWindingS,core,frameandtankzallconnectedtogethertoearth.5.7.4AN
23、CILLARIESTESTSAncillariesnormallyincludezzBuchholz7,oilpressureprotectionztemperaturemonitoringdevisesandancillarywiring.Theseshouldbecheckedasconformingtodrawings.Wiringshouldbei26、nsulationtested,whereappropriateandwithstandtested,whereappropriate.5.7.5TESTREPORTREVIEWReviewalltestdata.5.8PAINTING
24、COATINGINSPECTIONSurfacepreparationforpaintingwillbecheckedforthefollowingattributesaccordingtothespecificationCleaningMethodsFreedomfromweldsplatte27rrdirtandotherdefectsPaintmanufacture,typandcolourtobecheckedagainstclientsrequirementsDryfilmthicknesstobecheckedaccordingtospecificationSurfacecondi
25、tiontobefreefrompin-holes,runs,damageandotherdiscontinuity5.9NAMEPLATESGSRefNo.:30Rev.:0Page:7of8INSPECTIONGUIDE28、LinespowerTRANSFORMERDate:26/03/04ContentstobecheckedinaccordancewiththeapproveddrawingsandSpecificationandstamped/markedinaccordancetoclientsrequirements5.10REPORTANDRELEASES.10.1.REPO
26、RTINGAfinalreportsummarisingtheactivitiescarriedoutwillbeissuedinaccordancewitht29、hecontractrequirementsandcirculatedwithinthelimitslaiddown.ThereportwillbeinaformatapprovedbytheclientandmustclearlyindicatethefinalacceptanceorrejectionofthePowerTransformers.10.2.RELEASENOTEWhenrequiredbythecontract
27、areleasedocumentwillbeissuedtotheMan30、ufacturewhenthePowerTransformerhasbeenfinallyaccepted6.0SHIPPING6.1.1PREPARATIONANDPACKINGAllinternalsurfaceswhicharesusceptibletocorrosionwillbecoatedwitharustpreventativeAllthreadedconnectionsmustbeprovidedwithplugsCheckmanualsandinstructionareincludedast31、h
28、especificationrequirementsCheckprotectionagainsthumidity,abrasion,distortionandotherdamageCheckshippingmarkstomarkinginstructionsandrecordCheckhandlingmarksVerifythatthepackingmaterialsconformtospecificationsandacceptedpracticeforthemodeoftransport.7.0Powertran32、SFORMERDATADOSSIERThefollowingdocume
29、ntswillbereviewedandendorsedasnecessaryManufactureDataReportsMateriaICertificationDimensionaIRecordsAIItestreportsWelderProceduresandProceduresSGSRefNo.:30Rev.:0Page:8of8INSPECTI0NGIDELINESPOWERTRANSFORMERDate:26/03/048.0INSPECTIONCHEC33、KlistinspectioncheckLIST(1)VISALinspection/witnessingbybuyerRE
30、PRESENTATIVE(2)CERTIFICATESREC0RDSTOBECHECKEDBYBUYERREPRESENTATIVE(3)CERTIFICATESDATATOBEPROVIDEDBYVENDOR/SUPPLIER/MANUFACTURERPre-Fabrication/ProductionRequirementsSpecificationDetails/NotesPurchaseOrderRequirementslnspectionSTestPIan(ITP)WeIdProceduresSpecification(WPS)StProcedureQualificationRecords(PQR)W
