GuidelineNo.:E-07(202401)

E-07TRANSFORMERS

Issueddate:01,01,2024

?ChinaClassificationSociety

Foreword

CCSProductInspectionandTestingGuideline(hereinafterreferredtoasthisGuideline)containsthetechnicalrequirements,inspectionandtestingcriteriarelatedtoclassificationandstatutorysurveyofmarineproductstobeappliedforCCSapproval/inspection.

ThisGuidelinefreestheuserstoadoptothertestmethodsandrequirementswhichareequivalenttoorarestricterthanthisGuideline.

ThisGuidelineispublishedandupdatedbyCCS,andisreleasedat

.

Yourcommentsorsuggestionsarewelcomedandmaybesenttoouremailaddressed

mp@.

Historicalversionsandreleasedate:E-07(201510)October20,2015

E-07(201610)October28,2016

E-07(201705)May9,2017

E-07(201712)December26,2017

E-07(201909)September19,2019

E-07(202208)August25,2022

Mainchanges:

Updatetheversionnumberofthereferencestandard

Internalfeedback

E-07(202401)TRANSFORMERS

10/10

CONTENTS

Application 4

Normativereferences 4

Termsanddefinitions 5

Plansanddocuments 5

Technicalrequirements 6

Materialsandcomponents 7

Typetest 7

Unit/batchinspection 9

Application

TRANSFORMERS

ThisChapterappliestoapprovalandinspectionofDry-typetransformersforpowerandlighting(includingsinglephasetransformersratedat1kVAormoreandthree-phasetransformersratedat5kVAormore)installedandusedonshipsandoffshoreinstallations.Acceptanceofliquidimmersedtypetransformersissubjecttospecialconsideration.TheLiquid-immersedtransformersshallmeettherequirementsofChapter2,PartFourofCCSRulesandtheapplicablepartorotherequivalentstandardsoftheIEC60076series.Instrumenttransformerandauto-transformercanbeimplementedbyreference.

Normativereferences

TheapprovalandinspectionoftransformersinthisChapteraretobebasedonthefollowingdocuments:

IEC60092-303(1980-1)Electricalinstallationsinships–Part303:Equipment-Transformersforpowerandlighting

IEC60092-303-am1(1997-9) Amendment1-Electricalinstallationsinships–Part303:

Equipment-Transformersforpowerandlighting

IEC60076-1(2011-04) Powertransformers–Part1:General

IEC60076-2(2011-02) Powertransformers–Part2:Temperatureriseforliquid-immersedtransformers

IEC60076-3(2018-03) Powertransformers–Part3:Insulationlevels,dielectrictestsandexternalclearancesinair

IEC60076-4(2002-06) Powertransformers–Part4:Guidetothelightningimpulseandswitchingimpulsetesting-Powertransformersandreactors

IEC60076-5(2006-02) Powertransformers–Part5:Abilitytowithstandshortcircuit

IEC60076-10:(2016-03) Powertransformers–Part10:Determinationofsoundlevels

IEC60076-10-1:(2016/AMD1:2020) Powertransformers–Part10-1:Determinationofsoundlevels-Applicationguide

IEC60076-11(2018-08) Powertransformers–Part11:Dry-typetransformers

IEC60076-12:(2008-11) Loadingguidefordry-typepowertransformers

IEC60529(2013-08) Degreesofprotectionprovidedbyenclosures(IPCode)

IEC60068-2-30(2005-08) testing–Part2-30:Tests-TestDb:Dampheat,cyclic(12h+12hcycle)

IEC60068-2-11(2021) Environmentaltesting–Part2:Tests-TestKa:Saltmist

CCSRulesforClassificationofSea-goingSteelShips,anditsamendments

GuidelineonTypeApprovalTestofElectricalandElectronicProducts(currentvalidversion)

Termsanddefinitions

ThetermsanddefinitionsusedinthisChapterareconsistentwiththoseofIEC60076.

Plansanddocuments

ThefollowingplansanddocumentsaretobesubmittedtoCCSforapproval:

Generalplans;

Drawingsofmainpartsincludingframe,cliquids,ironcores,terminalboxes,enclosures(ifapplicable);

Technicalspecificationsoftheproducts;

Typetestprogramme.

ThefollowingplansanddocumentsaretobesubmittedtoCCSforinformation:

Operationinstructionsfortheproducts;

Processflowdiagramindicatingqualitycontrolpoints;

Documentsofmanufacturingprocedures,coveringwinding,sheetmetalprocessing,painting(ifapplicable),lamination,insertion,vacuumdippingcoating(ifapplicable),drying(ifapplicable),welding,polyestercasting(ifapplicable)andvariouscalculationsheets(tables);

Listoftypes(trademarks)andsuppliersofmainrawmaterials(e.g.magneticwires,siliconsteelsheets,insulationpaperandinsulatingpaints);

Drawingofexternalwiring.

Designandtechnicalrequirements

MarinetransformersaretocomplywithIEC60092-303andinaddition,thefollowingrequirements:

Alltransformers,exceptthoseusedformotorstarting,aretobedoublewoundorhavemultiplewindings,withnoelectricalconnectionsbetweenprimaryandsecondarywindings.

Thecoolingmethodofdry-typetransformerisdetailedinArticle5.8.3ofIEC60076-11,IncludingAN、AN/AF、AFWF、WF.IfthecoolingmodeisAFWFandWF,effectivemeasuresshouldbesetuptopreventtheaccumulationofmoistureandcondensatewater.

Thevoltageregulation,Temperaturerise,Short-circuitshallcomplywiththerequirementsofChapter3,PartFourofChinaClassificationSocietyRulesforClassificationofSea-goingSteelShips.

Properterminalsandclearmarksshouldbeprovidedforoutsidewirings.Theterminalsshouldbeprotectedandisolatedfromeachothertoavoidaccidentalgrounding,shortcircuitorbeingtouched.

Transformersshouldhaveagroundingterminalforprotectionuse.Allthemetalpartswhicharenotelectricallychargedshouldhavestructuralmethodtobeconnectedtothegroundingterminal.

Marinetransformerswithmetalenclosuresaretocomplywiththeabove-mentionedstandardsaninaddition,thefollowingrequirements.

Metalenclosuresaretobeofsufficientmechanicalstrengthformechanicalprotection,normaloperationandsafehandlingoftransformers.

Metalenclosuresaretohavesufficientspacetomaintainenoughairclearanceandcreepagedistancebetweenconductingpartsandbetweenconductingpartsandnon-conductingpartsoftransformersinsidemetalenclosures.Whenatransformermountedinthemetalenclosureisinnormaloperation,thetemperatureriseistocomplywiththerequirementsofChapter3,PartFourofChinaClassificationSocietyRulesforClassificationofSea-goingSteelShips.

Degreeofprotectionprovidedbymetalenclosuresistobeappropriatetotheambientconditionsofthelocationwheretransformersareinstalled.Fortransformerswithvoltageratinghigherthan1kV,followingrequirementsaretobecompliedwith:TheenclosureprotectionclassshouldbeatleastIP23.Ifinstalledinlocationswhichcanbeaccessedbyunprofessionalpersonnel,theenclosureprotectionclassshouldbeatleastIP4X,theinstallationshouldcomplywithCCSRulesPartFour.

Fortransformersusedforelectricpropulsion,thealarmanddisplayofhightransformerwindingtemperatureshallmeettherequirementsofTableChapter15,PartEightofCCSRules.

Thevoltageregulationshallcomplywiththeprovisionsof,Chapter3ofArticle4of"SteelRegulation",andcanbeobtainedbythecalculationofimpedancevoltageandloadloss.

Inthespecifiedloadandpowerfactor,thevoltageregulationiscalculatedaccordingtotheformula(1):

voltageregulation=n(UacosфUxsinф)+0.005n2(Uxcosф-Uasinф)2 (1)

Whentheshortcircuitimpedanceis4%orbelow,thevoltageregulationcanbecalculatedaccordingtoformula(2):

voltageregulation=n(UacosфUxsinф) (2)

Formula:Ua-voltagereductionfromshort-circuitimpedanceandloadloss,V;Ux-voltagereductionfromshort-circuitimpedanceandloadloss,V;n-loadcoefficient(ratioofloadtoratedcapacity);

cosф-powerfactor.

Materialsandcomponents

MaterialsandcomponentsshouldbecontrolledbytherelevantrequirementsofCCScurrentrules.

Shallbeincludedinthelistofeligiblesuppliers,ThelistofmanufacturerforthefollowingmaterialsandcomponentsoftheproductshouldnotbechangedwithouttheSociety'sapproval:Siliconsteelsheet,copperwire/aluminumwire/copperfliquid/aluminumfliquid.

Typetest

Dry-typetransformersaretobesubjectedtotypetestaccordingtothefollowingrequirements.

Unlessotherwisespecified,alltestsshallbecarriedoutunderenvironmentalconditionsof5℃~40℃.

TypetestofDry-typetransformersisatleasttobeinaccordancewithTable7.2.

TypeTestItems Table7.2

No.

Testitem

Technicalrequirements

Testmethod

1.

Exteriorinspection

Visualinspection

2.

Measurementofwinding

resistance

IEC60076-1para.11.2

IEC60076-1para.11.2

3.

Measurementofvoltageratioandcheckofphase

displacement

IEC60076-1para.11.3

IEC60076-1para.11.3

4.

Measurementofno-loadloss

andcurrent

IEC60076-1para.11.5

IEC60076-1para.11.5

5.

Measurementofshort-circuit

impedanceandloadloss

IEC60076-1para.11.4

IEC60076-1para.11.4

6.

AppliedVoltagetest

,Chapter3,PARTFOURofCCS

Rules

IEC60076-3para.10

7.

Inducedvoltagewithstand

test

,Chapter3,PARTFOURofCCS

Rules

IEC60076-3para.11

8.

Insulationresistancetest

,Chapter3,PARTFOURofCCS

Rules

,Chapter3,PARTFOUR

ofCCSRules

9.

Lightningimpulsetest(applicableforUm>3.6kV

dry-type)

IEC60076-11para.14.3.1

IEC60076-3para.13

10.

Partialdischargemeasurement

(applicableforUm>3.6kV

dry-type)

IEC60076-11para.14.2.7

IEC60270,

IEC60076-3AppendixA

11

Voltageregulationtest

,Chapter3,PARTFOURofCCS

RulesforClassificationofSea-goingSteelShips

Article5.4ofthisguide

12

Short-circuittest(Fordry-type

transformersonlywhenrequiredbythecustome)

,Chapter3,PARTFOURofCCS

RulesforClassificationofSea-goingSteelShips

IEC60076-5

13

Temperaturerise

,Chapter3,PARTFOURofCCS

Rules

IEC60076-2(forLiquid-filled),IEC60076-11 para.14.3.2(for

dry-type)

14

Dampheattest

CCSGuidelinesforTypeApprovalTestofElectricandElectronicProducts

(currentvalidversion)2.10,6period

IEC60068-2-30

15

Enclosuretest(fortransformerswithenclosures)

IEC60529

IEC60529

16

SaltmisttestKa(foropendeck)

CCSGuidelinesforTypeApprovalTestofElectricandElectronicProducts

(currentvalidversion)2.13

IEC60068-2-11

Selectionoftypicalsamples

TypetestsamplesaretobetakenfromqualifiedproductsbyCCSSurveyoratthemanufacturer.

InthecaseofinitialtypeapprovalAtleastonemarinetransformeristobetakenastest

sample(moremaybetakenifnecessary),ifthecapacityoftheproductapplyingforapprovalisnotlargerthan200kVA,thecapacityofwhichistobethemaximumintheproductstobeapproved.Ifthecapacityoftheproductapplyingforapprovalislargerthan200kVA,thenthetestsamplecanbechosebetweenrange50%~100%,butitisneededtoconfirmthatthemanufacturerhastheabilitytoproducethemaximumcapacity.Wheredifferentinsulationlevelsandconstructionsaretobecoveredbyapproval,relatedproductsaretobesampledrespectively.

Ifenvironmentaltestsarerestrictedbytestequipment(suchasdampheattest),asmallertransformerofthesametypemaybetakenastestsample.

Testorganization

Inthecaseoftypeapproval,thetypetestshallgenerallybecarriedoutatanCCS-approvedtestingagency.Iftheequipmentmanufacturingplanthasastandardtestenvironment,testequipmentandsuitableinspectionpersonnel,withtheconsentoftheCCS,thetypetestmaybecarriedoutinthelaboratoryofthemanufacturingplantandwitnessedbytheCCSsurveyoronthespot.

Unit/batchinspection

Transformerratedat50kVAandabove,ThemanufacturersholdingaCCSTypeApprovalBCertificatearestilltocarryoutunit/batchinspectionf