GuidelineNo.:E-04(202401)

E-04GENERATORS

Issueddate:01,01,2024

?ChinaClassificationSociety

Foreword:

CCSProductInspectionandTestingGuideline(hereinafterreferredtoasthisGuideline)containsthetechnicalrequirements,inspectionandtestingcriteriarelatedtoclassificationandstatutorysurveyofmarineproductstobeappliedforCCSapproval/inspection.

ThisGuidelinefreestheuserstoadoptothertestmethodsandrequirementswhichareequivalenttoorarestricterthanthisGuideline.

ThisGuidelineispublishedandupdatedbyCCS,andisreleasedat

.

Yourcommentsorsuggestionsarewelcomedandmaybesenttoouremailaddressed

mp@.

Historicalversionsandreleasedate:E-04(201510) October20,2015

E-04(201610) October28,2016

E-04(202303) March30,2023

Mainchanges:

1.Inaccordancewiththecurrentvalidrulesandstandardsupdate.

E-04(202401)GENERATORS

10/11

CONTENT

TOC\o"1-1"\h\z\u

Application 4

Normativereferencedocuments 4

Definitions 5

Plansanddocuments 6

Designandtechnicalrequirements 6

Maincomponentsandparts 9

TypeTest 9

Unit/batchinspection 10

GENERATORS

Application

Thisguidelineappliestoengine-driventhree-phaseACsynchronousgeneratorsratedat2500kWand50Hzor60Hzand1kVandtheirexcitationdevices,intendedforshipsandoffshoreinstallations.ThisChapterisapplicabletomotorsforgeneralpurposes.Wheremotors,whichareintendedforspecialpurposesorforwhichspecialtestsarerequired,arenotspecificallycoveredbythisChapter,thestandardsforsuchmotorsapply.

Thisguidelineappliestothree-phaseACsynchronousgenerators(includingemergencygenerators)forgeneralpurposes.Wheremotors,whichareintendedforspecialpurposesorforwhichspecialtestsarerequired,arenotspecificallycoveredbythisguideline,thestandardsforsuchmotorsapply.

Normativereferencedocuments

CCSRulesforClassificationofSea-goingSteelShips,anditsamendments;

CCSRulesforMaterialsandWelding,anditsamendments;

CCSGD22-2015<GuidelinesforTypeApprovalTestofElectricandElectronicProducts>(currentvalidversion).

IACSURE13(Rev.2Aug2015Corr.1June2018)TestrequirementsforRotatingMachines;

IEC60092-301:1980{Ed.3.0}Electricalinstallationsinships-Part301:Equipment–

Generatorsandmotors;

IEC60034-1:2022{Ed.14.0}RotatingmachinesPart1:Ratingandperformance;

IEC60034-2-1:2014{Ed.2.0}Rotatingelectricalmachines-Part2-1:StandardMethodsfordetermininglossesandefficiencyfromtests(excludingmachinesfortractionvehicles)

IEC60034-2-2:2010{Ed.1.0}Rotatingelectricalmachines–Part2-2:Specificmethodsfordeterminingseparatedlossesoflargemachinesfromtests–SupplementtoIEC60034-2-1

IEC60034-4-1:2018{Ed.1.0}Rotatingmachines-Part4-1:Methodsfordeterminingelectricallyexcitedsynchronousmachinequantitiesformtests;

IEC60034-5:2000{Ed.5.0}Rotatingmachines-Part5:Degreesofprotectionprovidedbytheintegraldesignofrotatingelectricalmachines.Classification;

IEC60034-6:1991{Ed.2.0}Rotatingmachines-Part6:Methodsofcooling;

IEC60034-8:2007/AMD1:2014{Ed.3.1}Rotatingmachines-Part8:Terminalmarkingsanddirectionofrotation;

IEC60034-9:2021{Ed.5.0}Rotatingmachines-Part9:Noiselimits;

IEC60034-14:2018{Ed.4.0}Rotatingmachines-Part14:Mechanicalvibrationofcertainmachineswithshaftheights56mmandhigher-Measurement,evaluationandlimitsofvibrationseverity;

IEC60034-15:2009{Ed.3.0}Rotatingmachines-Part15:ImpulsevoltagewithstandlevelsofrotatingACmachineswithform-woundstatorcoils;

IEC60034-16-3:1996Rotatingmachines-Part16:Excitationsystemsforsynchronousmachines.Dynamicperformance;

IEC60068-2-30:2005{Ed.3.0}Environmentaltesting-Part2-30:Tests–testDb:Dampheat,cyclic(12h+12hcycle);

IEC60068-2-11:2021{Ed.4.0}Environmentaltesting-Part2-11:Tests–testKa:Saltmist;

IEC60085:2007{Ed.4.0}Electricalinsulation-Thermalclassification.

CB/T3907-1999Ultrasonicflawdetectionofmarineforgedsteelparts.

IACSRec.68Guidelinesfornon-destructiveexaminationofhullandmachinerysteelforgings

Definitions

1.3.1Series:ForthepurposeofthisChapter,thesameseriesmeansonegroupofproductswiththesameworkingprinciples.Inthecaseofanydifferenceinrawmaterial,manufacturingprocessandoptionalcomponents,theenterpriseistoidentifysuchdifferencesintheenterprisestandardsandindicatethemintypemarkings.Forexample,productswhicharedifferentindegreeofprotection,voltagerating,single/doublesupportingandlubricationaretobedeemedasbeinginthesameseries,whileproductswhicharedifferentinexcitation,insulationlevelandmethodsof

coolingmaybedeemedasbeingfromindifferentseries.

Plansanddocuments

Thefollowingplansanddocumentsaretobesubmittedforreview:

Generalplans;

Detaileddrawingsofmainpartsincludingassemblyofstators,assemblyofrotors,turningaxle,assemblyofcollectorringsorcommuters,bedplatesandstructureofterminalboxes;

Electricalschematicdiagram;

Drawingofexternalwiring;

Technicalspecificationsoftheproducts;

Typetestprogram.

Drawingofnameplate;

Listofrawmaterials(indicatingmanufacturers);

Essentialmanufacturingprocesses(suchasimmersionandbaking);

Operationinstructionsfortheproducts.

Designandtechnicalrequirements

ThedesignandmanufactureofproductsaretocomplywiththerequirementsofCCSRulesforClassificationofSea-goingSteelShips,CCSRulesforMaterialsandWeldingandIEC60092-301;thermalclassificationofelectricalinsulationistocomplywithIEC60085;methodsofcoolingaretocomplywithIEC60034-6;terminalmarkingsanddirectionofrotationaretocomplywithIEC60034-8;noiselimitsaretocomplywithIEC60034-9;andmeasurement,evaluationandlimitsofvibrationseverityaretocomplywithIEC60034-14.

Applicableenvironmentalconditionsandmaterialrequirements

Generatorsandtheirexcitationsystemsaretooperatesatisfactorilyunderthefollowingenvironmentalconditions:

Ambientairtemperature:45℃.(2)Relativehumidity:95±3％,withcondensationofwater.

Saltmist,oilvaporandmold.

Inclinationofshipsfromthenormal:

Listing:15°(22.5°foremergencygenerators,30°forliquefiedgascarrier);Rolling:22.5°;

Trimming:5°(10°foremergencygenerators);

Pitching:7.5°(10°foremergencygenerators).

Shockorvibrationimpactsonshipsandoffshoreoilunitsinserviceoroperation.

Materialrequirements

Enclosuresaretobeofsteelorcastironwith196.13MPaoftensilestrength.

Shaftingmaterialistobeheattreatedinanappropriateprocess,havingtensilestrengthnotlessthan441.30MPa,yieldstressnotlessthan210.84MPa.Theelongationoftestsamplesisnottobelessthan24%.ThechemicalcompositionofsteelistocomplywithTable5.2.2(1).

ChemicalCompositionofSteel Table5.2.2(1)

Chemicalcomposition(%)

C

Si

Mn

S

P

Cr

Mo

Ni

Cu

Residualelements

CarbonsteelCarbonmanganesesteel

≤

0.65

≤

0.45

0.30~

1.50

≤

0.035

≤

0.035

≤

0.30

≤

0.15

≤

0.40

≤

0.30

≤0.85

Flame-retardant,moisture-,andfungus-resistantaswellaslow-toxicmaterialsaretobeused.

Technicalrequirements

Mainandemergencygeneratorsincludingtheirexcitersaretobesuitableforcontinuousdutyattheirfullratedoutputandmaximumcoolingairtemperatureforanunlimitedperiod,withoutthelimitsoftemperatureriseaspertheirinsulationlevelsbeingexceeded.

Generatorsaretowithstandthefollowingovercurrentorexcesstorquewithoutinjury:ACgenerators:50%overcurrent2min

ACgeneratorsandtheirexcitationsystemsaretobecapableofmaintaining,understeady-stateshort-circuitconditions,acurrentofatleast3timesthefullloadratedcurrentforadurationof2s.

EachACgenerator,unlessoftheself-regulatedtype,istobeprovidedwithseparateautomaticandmanualvoltageregulatorsatthegeneratorcontrolpanel.

EachACgeneratordrivenbytheprime-moverhavinggovernorcharacteristicscomplyingwithCCSRulesforClassificationofSea-goingSteelShipstogetherwithitsexcitationsystemistobecapableofmaintainingthevoltageundersteadyconditionswithin±2.5%oftheratedvoltageforallloadsbetweenzeroandratedloadatratedpowerfactor.Theselimitsmaybeincreasedto

±3.5%foremergencysets.

ForACgeneratingsetsundernoloadconditions,whenthegeneratorisdrivenatratedspeed,givingitsratedvoltage,andissubjectedtoasuddenchangeofsymmetricalloadwithinthelimitsof60%oftheratedcurrentandthepowerfactornotexceeding0.4,thevoltageisnottofallbelow85%norexceed120%oftheratedvoltage.Thevoltageofgeneratoristhentoberestoredtowithinplusorminus3%oftheratedvoltageforthemaingeneratorsetsinnotmorethan1.5s.Foremergencysets,thesevaluesmaybeincreasedtoplusorminus4%innotthan5s,respectively.

ForACsynchronousgenerators,thefactorofdistortionofthewaveformfromasinusoidalfundamentaloftheline-to-linevoltageundernoloadconditionsisnottoexceed5%,exceptforsmallsize(e.g.lessthan24kW)generators.

ACgeneratorsandtheirexcitationsystemsaretooperateundersteadyconditionsforanunlimitedperiodundertheenvironmentalconditionsasspecifiedinCCSRulesforClassificationofSea-goingSteelShips.

OverspeedprotectionforprimemoversofgeneratingsetsaretocomplywiththerequirementsofIACSURM3.2.

PrimemoversasmainpropulsionmachinesaretocomplywiththerequirementsofIACSURE17.

Maincomponentsandparts

MaterialsandcomponentsaretocomplywithrelevantrequirementsofCCSRules.ShaftmaterialformainenginedrivengeneratorswheretheshaftispartofthepropulsionshaftingistobecertifiedbyCCS.ShaftmaterialforothergeneratorsistobeprovidedbymanufacturersasapprovedbyCCSortohavematerialcertificate,andotherequivalentdocumentaryevidence.

Shaftmaterialforgeneratorscanbeusedtherecognizedinternationalstandardsandnationalstandards/industrystandardsforNDT.ForthefollowingTable3.2usualNDTstandards,theacceptancecriteriaasspecifiedbelowareapplied.Whenusingotherstandards,tobeevaluatedbyCCSandconfirmedthedeterminationlevelbeforeuse.

TheacceptancecriteriaofmarineproductsNDTspecifiedbelow①Table6.2

UT

MT

PT

StandardNo.

Level

Standard

No.

Level

Standard

No.

Level

CB/T3907

II

IACSRec.69

acceptable

IACS

Rec.69

acceptable

IACS

Rec.69

acceptable

①Themanufacturer’sacceptancecriteriacouldbeaccepted,ifthemanufacturerhasthe

acceptancecriteriafortheequipmentcomponent.

TypeTest

Typesandspecificationsoftypetestsamplesaretocovertheproductsforwhichapprovalissoughtandbetechnicallyrepresentativefordetermining,throughtypetest,whetherthemanufacturerhasthecapabilitytomanufacturetheapprovalproductsasrequiredbyCCS.Twosamplesmaytobetakenfortestfromeachsamplingseriesofgenerators.Atleastoneofthesamplestakenfromdifferentseriesistoberatednotlessthan80%ofthemaximumpowertobeapproved.

Samplesselectedfromdifferentseriesofthree-phaseACsynchronousgeneratorsatthesamemanufactureraretoberepresentativeintermsofpower,speed,insulationlevel,degreeofprotection,voltagerating,single/doublesupporting,lubrication,meansand/ormethodofcooling,andmanufacturingprocess.

Thetypetestofthree-phaseACsynchronousgeneratorsistobeinaccordancewithTable7.3.

Theinternationalstandardsreferredtointhisguidelinearetheirrespectivelatestversions.

Inlieuofthestandardsoftestmethodsreferredtointhisguideline,otherequivalentorrecognizedstandardsmaybeappliedasappropriate.

TypeTestItemsforThree-PhaseSynchronousGenerators–GeneralTests Table7.3

No.

Testitem

Technicalrequirements

1

Visualexamination

Approvedplansandtechnicaldocuments

2

Measurementofinsulationresistance

,PARTFOURofCCSRulesforClassificationof

Sea-goingSteelShips

3

Measurementofwindingresistance

Technicalspecifications

4

Verificationofvoltageregulationsystem

and,PARTFOURofCCSRulesfor

ClassificationofSea-goingSteelShips

5

Overload/overcurrenttest

,PARTFOURofCCSRulesforClassificationof

Sea-goingSteelShips

6

Overspeedtest

IEC60034-1para.9.7

7

Withstandvoltagetest

IEC60034-1para.9.2

8

Noloadtest

4,PARTFOURofCCSRulesforClassificationof

Sea-goingSteelShips

9

Examinationofbearings

6,PARTFOURofCCSRulesforClassificationof

Sea-goingSteelShips

10

Ratedloadtestandmeasurementof

temperaturerise

3.2.3,PARTFOURofCCSRulesforClassificationof

Sea-goingSteelShips

11

Verificationofsteady-stateshort-circuit

1,PARTFOURofCCSRulesforClassificationof

Sea-goingSteelShips

12

Inclinationtest①

<GuidelinesforTypeApprovalTestofElectricand

ElectronicProducts>(currentvalidversion),para.2.6

13

Dampheattest-cyclic

<GuidelinesforTypeApprovalTestofElectricand

ElectronicProducts>(currentvalidversion),para.2.10

14

SaltmisttestKa②

<GuidelinesforTypeApprovalTestofElectricand

ElectronicProducts>(currentvalidversion),para.2.13

15

Testofdegreeofenclosureprotection

IEC60034-5

16

Electromagneticcompatibilitytest

<GuidelinesforTypeApprovalTe