Each telephone call is an investment: In the future.

W E L I S T E N .

WTG service tailor-made:Our maintenance and optimization modules.

Multibrand from Vestas® to GE®.

Recommended by independent engineers.FC Remote Access: So close and yet so far away.Remote monitoring can often correct faults without a service team needing to be deployed. However, until now frequency converter (FC) malfunctions have almost always necessitated on-site repairs. With our FC Remote Access, the FC can also be accessed remotely and malfunctions quickly analyzed and efficiently corrected.

DALFI 1979 generator: A six ton milestone.The DALFI generator is a joint development with SSB Duradrive GmbH. The stator and rotor have been dimensioned and designed to optimize its efficiency with high speed variability, an efficient cooling concept and much more. All with an extended service life.

Internal crane system: Heavy loads made easy.The use of heavy-duty cranes is associated with a great deal of work and high costs.The internal crane system from Availon is an alternative. With a weight of just 200 kg,it can be used quickly and flexible. Long waiting periods and downtimes are avoided, and the expensive deployment of a heavy-duty crane is a thing of the past.

LED obstruction lights: A bright spot on the horizon.LEDs are virtually unbeatable with regard to efficiency and reliability. Compared with conventional obstruction lights, they also prevent costly lightbulb replacements and the exchange of sensitive devices in WTGs. Our LED obstruction lights are maintenance- and wear-free and meet all the legal requirements.

Line reactor ventilation system: Temperature-oriented to a high degree.We discovered heat accumulation in the vicinity of the line reactor in some WTGs, which prevented adequate cooling. This reduced the service life of the line reactor and promoted short circuits with serious consequences. The solution: The temperature-sensitive line reactor is protected by means of high-performance diagonal fans.

Control box: Full facilities to go.Instead of operating the turbine from the tower base, the control box can be usedto access the controller of the WTG directly from the nacelle. This takes place via a portable control panel, e.g., in order to activate the rotor lock before work is carriedout in the hub. This speeds up the work, thereby saving time and money.

Reinforced transformer bracket: Advantages that quicken your pulse.A transformer is subject to high levels of vibration. They can be so strong that the transformer bracket can break, causing the transformer to tilt or hang on one side. Our solution makes use of the crane runway and uses steel rods to reinforce the transformer bracket.

Access monitoring: Good ideas to prevent unpleasant surprises.Besides the material damage, break-ins into WTGs also cause massive repair costs,since the culprits usually use brute force. The solution: Our access monitoring system, which monitors the area in front of and inside the WTG with motion detectors and acoustic sensors. If in doubt, remote moniting immediately alerts the police.

We don't just claim that calling us is well worth the effort – we can prove it too. In addition to developing special service provisions at our competence centers in Rheine and Hamburg, we also develop upgrades, that ensure even older turbines run efficiently and eco-nomically in the future or, even better, become more profitable. This pays off, particularly for you. For example, with yaw monitoring for Vestas® types V80 and V90.

Each telephone call is an investment: In the future.

Availon GmbH | Jacksonring 2 | 48429 Rheine | Germany | www.availon.eu

Find out more about our range of services atwww.availon.eu, send us an e-mail or call us.We look forward to hear from you.

A telephone call is well worthwhile.An e-mail, too.

Headquarters: +49 (0) 5971 8025-0

Advice: +49 (0) 5971 8025-210

Remote Monitoring: +49 (0) 5971 8025-250

E-Mail: windservice@availon.eu

Four options with flexible services on a modular basis.

WindKeeper®Complete ModularRemote monitoring, a wear parts package and fault elimination are just a few of the basic services included in WindKeeper® Complete Modular. This service package can be made even more exclusive with a choice of upgrades or an availability guarantee as well as the opportunity to choose whether major compo-nents are covered in your service contract. As with WindKeeper® Basic and WindKeeper® Basic Modular, this service contract can be concluded up to the 15th year of your WTG’s operation.

WindKeeper®Basic

Reliable service for your wind turbine on a regular basis. WindKeeper® Basic covers all your basic maintenance needs. This includes all maintenance materials including small parts as well as labor, expenses and all neces-sary tools for completing the job. Subsequent services for improving your wind turbine can be ordered as needed, such as paid upgrades or additional testing procedures.

WindKeeper®Complete

Your all-inclusive service package. Not only does WindKeeper® Complete take all your worries away, it also minimizes your risks. This includes the replacement of major com ponents and, depending on turbine type, up to six upgrades – regardless of whether it is to increase the safety or the availability of your WTG. WindKeeper® Complete also offers flexible-term contracts. We would be happy to provide you with competent advice on how to choose the best coverage for your needs.

WindKeeper®Basic Modular

When you’re not quite ready for full-main-tenance coverage, but are looking to extend your basic maintenance package with additional services tailored to your needs, then WindKeeper® Basic Modular is the answer. It offers you a wide range of extras ranging from upgrades and rotor blade services to drive train analysis, including frequency converter monitoring and video endoscopy. When the need arises we respond with a choice of possibilities.

Four levels of security.Subsidiary insurance for all service packages is available through an independent insurance broker, whom we have known for many years and who will subsequently represent your interests. A master agreement has been developed to cover your remaining risks. This will provide insurance protection perfectly tailored to your project at attractive conditions. Please contact us if this is required!

An overview of our service packages. Maintenance • Allmaintenancematerialsandsmallparts,maintenance of bolts and any costs of disposal • Includinglabor,expensesandalltools required for this work• Basedonthemaintenancespecifications(manufacturer) and extended maintenance documents (Availon)• CertifiedbyGermanischerLloyd(GL)

Module 1: Remote monitoring• PermanentsurveillanceofyourWTGs(24/7)• Immediateprocessingofreceivedfaultmessages (also on weekends and public holidays)• Faultsare(wherepossible)remediedonlinebytrained staff offering operators technical phone support

Module 2: Wear parts package• Includesthefollowingmaterialwithoutinstallation:

Vestas® Wear parts Replacementofair/oil/waterhosesGenerator power brushesGenerator grounding brushesIndependent power supplyLCTU brass core + lubricantHydraulic accumulator

GE® Components Wear partsUPS ......................................................... Battery pack Yaw brake ............................................ Pad - type B Pad - type A Hoses Secondary brake ............................. Brake pads - BSFH 300 Brake pads - BSFI Diaphragm accumulator ............ 0.32l Slipring gearbox ............................... Power brushes Generator ............................................ Power brushes 50 to 100 mm Battery trays ...................................... Battery trays Pitch motors ...................................... Carbon brushes

Module 3: Oil exchange• Changingofoilandoilfilterofthemainbearing, oftheyawgearring/pitchsystemandofthehydraulics (if applicable)• Includinglabor,expensesandalltoolsrequired for this oil exchange

Module 4: Maintenance of rotor blades• Inspectionoftheleadingandtrailingedgeofthe rotor blade as well as to the pressure and suction side on cracks, erosion, paint damage or other damages• 4-pointmeasuringofthelightningprotectionsystem• Inspectionofthelightningreceptor(s)fordamage caused by lightning strikes• Inspectionofthegluedconnectionsoftherotor blade on air inclusions, cracking and peeling• Inspectionoftherotorbladesealsforcracks,structural damage and functionality• Cleaningofthedrainageholes(ifapplicable)• Inspectionoftheflowelementsandtheleading edge protection tape (if applicable)• Detailedreportincludingimages• Repairsuptofourmanhoursincluded

Module 5: Unscheduled Maintenance• Remedyingofallfaults,requiringacallout• Includinglabor,expensesandalltoolsrequired• Exceptfordamageonmajorcomponentsand damage caused by force majeure • Alsoonweekendsandpublicholidays• Pleasereadthe*footnoteforWindKeeper® Basic Modular

Module 6: Maintenance of frequency converter (GE®)• Asspecifiedbymanufacturer

Module 7: Major components• Replacementandrepairofmajorcomponents• Includingmaterials,expenses,labor, all tools required and costs of crane for this work• Pleasereadthe*footnoteforWindKeeper® Complete Modular

All product, service and technical specifications in these tables are non-binding and not to be misconstrued as actual terms of contract. The terms and conditions of each contract are subject to the explicit agreements of the contract parties. Contracts can be concluded for WindKeeper® Basic, WindKeeper® Basic Modular and WindKeeper® Complete Modular up to the 15th year of operation. Flexible contracts are possible for WindKeeper® Complete on inquiry.

*Thismoduleisonlyavailablewhencombinedwithatleastoneotherspecificmodule.Pleasecontactoursalesdepartment.

Major components Vestas®• Rotorblades •Castingpartofhub• Bladebearings •Baseframe• Yawgearring •Gearbox• Generator •Tower•Mainbearingandmainshaft • Transformer(ifintegratedinWTG)

Major components GE®• Rotorblades •Castingpartofhub• Bladebearings •Baseframe• Yawgearring •Gearbox• Generator •Tower• Yawdrive •Mainbearingandmainshaft• Frequencyconverter• Transformer(ifintegratedinWTG)

Module 8: Availability guarantee• 95%averagetechnicalavailability1to3WTGs• 97%averagetechnicalavailabilityfor4andmoreWTGs•Whereaserviceagreementappliestomorethanone WTG, the average technical availability of all WTGs of the agreement is decisive (availability of wind farm) • Based on 12 hours of rotor blade maintenance every two years • Pleasereadthe*footnoteforWindKeeper® Complete Modular

Module 9: Technical availability (TA) calculation and report• Containsamonthlyandannualevaluationofthetechnical availability and production data • Includingmonthlyprovisionofresultsanddatadirectly to the client

Module 10: Maintenance and replacement of safety components• Checkingandreplacementofallsystemcomponentsof the WTG requiring testing and monitoring as required (excl. climb assist system and elevator)• Includingtravelexpensesofservicetechniciansused for this purpose • ExcludingcostsofexternalTÜVstaff

Module 10 for Vestas® V80/V90 (2 MW)EveryVestas®V80/V90containsrescueequipmentandaservice lift. The following is checked:• Ladderandclimbassistsystem• Rescueequipment(foreachWEAof1MWormore)• Crane• Servicelift(foreachWEAof1MWormore)• Personalequipmentprotectingagainstfalling(e.g.belt, safety rope and fall absorber)• Fireextinguishers,helmetandfirstaidbox(ifapplicable)

Module 10 for Vestas® V52 (850 KW)The following is checked:• Ladderandclimbassistsystem• Crane• Personalequipmentprotectingagainstfalling(e.g.belt, safety rope and fall absorber)• Fireextinguishers,helmet,rescuedeviceandfirstaidbox (if applicable for WTG)

Module 10 for GE®A service lift is not included in this category but could be ordered as an option. Only from a certain year of manufacture onwards were WTGs with a hub height of 100 m supplied with a service lift. The following is checked:• Ladderandclimbassistsystem• Crane• Personalequipmentprotectingagainstfalling(e.g.belt, safety rope and fall absorber)• Fireextinguishers,helmet,rescuedeviceandfirstaidbox (if applicable for WTG)• Servicelift(ifWTGcontainslift)

Module 11: BGV A3 & SF6 checkBGV A3 check:• Checkingoftheelectricalinstallation • AccordingtotherequirementsofBGVA3, DIN VDE 0105-100 and VDS clause 3602• Inspection,functionaltestingandmeasuring (including measuring report)• Promptremedyingofminorfaults SF6 check:• VisualinspectionofSF6,checkingoftorquesontheend seals, cleaning of connections, checking of SF6 gas and functional check of triggering relay • Includinglabor,expensesandalltoolsrequired for this work

Module 12: Maintenance of external transformer station for GE® medium voltage switchgear (MS)• Generalvisualinspectionincludingcheckingofthe MS system• Checkingofallboltedcontactsandswitchmechanisms• Includingcleaningandrelubricationofdrives• Trialswitchingincludingcheckingofauxiliaryswitches and of open circuit triggers• CleaningofentireMSsystem

Oil transformer• Generalvisualinspectionoftransformer• CheckingcableconnectionsonMVandLVside• Checkingoillevelandseal• Checkingtransformerguard• Cleaningoftransformer

LV system/compensation system• GeneralvisualinspectionandcheckingofLVsystem• Checkingofallboltedcontactsandswitchmechanisms• Trialswitchingincludingcheckingofauxiliaryswitches and of open circuit triggers (if applicable)• CleaningofentireLVsystem

Transformer room and accessory• Cleaningoftransformerroom• Checkingfunction,completenessandstationaccessory• Groundingmeasurement

Others:• Aftercompletionofthemaintenancework,thecustomer is issued a maintenance report

Module 13 L: Inspection of drive train L• Annualmanualmeasuringofthedrivetrainon site by frequency analysis using a peak analyzer and visual inspection• Includingmaterial,expenses,laborandalltools required for this work• Archivingofmeasureddataandimages(incaseof abnormalities)• Includingmeasuringordamagereportforclient (in case of abnormalities)

Module 13 XL: Inspection of drive train XL• Annualmanualmeasuringofthedrivetrainon site by frequency analysis using a peak analyzer and video endoscopy• Internalarchivingofmeasureddataandimages(incase of abnormalities)• Includingmeasuringordamagereportforclient(incase of abnormalities) • Includingmaterials,expenses,laborandalltools required for this work

Module 13 XXL: CMS monitoring and reporting• InstallationofaCMSdevice• Permanentmonitoringofsystem• RegularevaluationandreportingofdataofCMSmeasuring (in case of abnormalities)• Includingmaterials,expenses,laborandalltoolsrequired for the work

Maintenance Modules Optimization modules Module 14: Upgrades Vestas®

14.01 Carbon brush holders•Newfixationconcept•Evenwearonleadingandtrailingside•Conservationofsliprings•Quickandsimplereplacementofcarbonbrushes•Safeandquickhandlingofinstallationwork•50%increaseinservicelifeofcarbonbrushes•Extendschangeintervalsfrom1to1.5years•Lowersreplacementcosts 14.02 Ventilation package transformer•Moreefficientventilationpackagefortransformer•Specialdeflectorsguidetheairthroughthenacelle•Only20%ofthecoolingairentersthetransformer (sufficient for cooling)•Preventssoiling,e.g.saltdeposits•Increasedservicelife 14.03 Slipring box suction system•Accurateextractionofairfromtheslipringroom•Automaticremovalofgraphitedustinaircurrent•Minizessusceptibilitytofaults(increasedtemperatures, spark formation, flashovers, short-circuiting)•Additionalcalloutsarenolongerrequired•Reducesworkforserviceengineer•Preventsdamagetogeneratorandtotalfailure

14.04 Yaw drive monitoring•Messuringofcurrentconsumptionofindividualactuators•Deviationfromnormaloperationisimmediatelyapparent (PLC compares rated current <–––> idle current)•Maincontrollerreactswithemergencyprogram(e.g. reduction of tracking steps)•Automaticfaultreportingtooperatorandservicestaff (GSM modules)•Repairscanbeplannedandcarriedoutpromptly•Shortandplannabledisruptionstoproduction•Minimumlossofyield

14.05 Replacement of rotor cables•Diagnosisofoverheatingduringvisualinspection (damaged cable must thus be replaced)•Cabletobereplacedwithcablewithlargerdiameter•Alsoeffectiveduringhigherloadingandstrong-windphases•Specialtoolsandworkprocessesdevelopedforthis operation ensures an efficient replacement•Noneedforanexternalcrane•Preventsoverheatingintheareaoftherotorcablesofthe generator •Preventsirreversibledamageandlossofyield

14.06 Arc sensor•Constantmonitoringofthecreationofarcsby2sensors (photoelectric cells)•Additionalthirdsensordirectlyincontrolcabinetnextto circuit breaker •SavedeactivationofSF6mediumvoltageswitchgearwithin milliseconds•Permanentmonitoringofcopperrailmaindistribution•Preventsseriousfiresandtotalloss

14.07 Permanent lubrication system yaw gear ring•Constantlubricationofyawpinionsandgearteeth•Preventscorrosion(nocorrosion–nowear)•Permanent, even lubrication film on gears•ImprovesWTGperformance

Module 14: Upgrades GE® 14.50 Kidney filtration system of main gearbox oil•Checkingoffiltrationofparticlesandoilageingproducts of at least 3 μm (standard from 10 μm)•Potentiallylongeroillifeduetoefficientcleaningofgearboxoil•Gearboxoilcanbechangedlessfrequently(60months+)•Additivesremaindissolvedingearboxoil 14.51 Position monitoring of gearbox•Permanentmonitoringofpositionofgearboxbytwo sensors•Earlydetectionofpotentialdamageonmainbearing•Automaticstopincaseofpositionalchange(gearboxisnot damaged)•Immediatefaultnotificationviaremotemonitoring•Preventscostlyconsequentialdamagecausedbyincreased loading in planetary bearing

14.52 Grid coupling contactor•Relievesthecircuitbreakerasprotectionelementagainst overcurrent and undervoltage

•Reducesswitchingoperationstoamax.of20-30/year (normally 2,500 to 3,000)•Designedfor250,000switchingcyclesatratedcurrent•Preventsincreasedwear,thermaloverloading, malfunctioning•PreventsnearlyalldamagetoFCandgeneratorcausedby the malfunctioning of the circuit breaker•InstallationandconfigurationforeachWTGinnomore than 2 days 14.53 Permanent lubrication system of main bearing •Continuouslubricationandsupply•Independentsystemforeachseparatebearing•Preventsduplicatelubricationduringmaintenance•Lowwear•Preventsexcessiveandinsufficientlubrication•Increasestheservicelifeofthemainbearings 14.54 Permanent lubrication system of generator bearing•Continuouslubrication/supplyoffastrunninggenerator bearing•Independentsystemforeachseparatebearing•Preventsduplicatelubricationduringmaintenance•Lowwear•Preventsexcessiveandinsufficientlubrication•Increasestheservicelifeofthegeneratorbearings 14.55 Permanent lubrication system of yaw gear•Continuouslubricationyawpinions/gears•Preventscorrosion•Additionallyinstalledweatherprotectiondirectlycatches any dripping lubricant•Preventsfurthersoilingoftowerandcontaminationofthe environment •Improvesprovisionofcoolingairtothedrivetrainthrough additional ventilation hole in nacelle floor 14.56 Permanent lubrication system of pitch gear ring•Permanent,evenlubricationfilmongears•Hardfoampinionsuppliesthegearofthedrivewitha thin, even lubricating film •Relievesthegearringsoftherotorblades•Only¼ofthegearringisloadedduringoperation•Nocorrosion–nowear•ImprovesWTGperformance•Preventscostlydistortionofbladebearing 14.57 Axis cabinet ventilation •Optimumandcontinuousambienttemperatureof pitching battery is ensured by battery heating and insulation of control cabinet •Preventsheatlossandprematurefailureofbatterycaused by cold •Increasestheservicelifeofthepitchingbattery•Preventsmajorfluctuationsintemperature•Pitchingbatteriesrequirelessfrequentchanges

14.58 Ice-free sensors •Weathersensorswithhigh-performance230V heating•Preventsicingoverofanemometerandwindvane•GuaranteesnormaloperationoftheWTGevenunder extreme temperatures •Temperaturerangeofbetween–40°Cand+60°C•Highmechanicalstabilityduetodouble-screenedstainless steel ball bearings (anemometer)•Maximumaccuracyduetomagneticallydampened wind vane•Worldwidetriedandtestedsystem

Module 15: WTG check – Vestas®•Tobecheckedapprox.every12monthonrequest 15.01 Diagnosis of generator support•Includescheckinggeneratorsupportforcracks(magnetic powder test)•UltrasoundandX-raytestingonrequest•Includingdocumentationandphotos

15.02 Examination of gearbox•Tobecheckedapprox.every12monthonrequest special test methods for different types of gearbox in their installed state (camera and ultrasound test method)•Includingdocumentation 15.03 Examination of drive train•Checkingforcracks/lateralcracksonrotorshaftbelowthe seat of the main bearing

15.04 Examination of foundations1. Examination of concrete foundations and reinforcement (Ground Penetration Radar) 2. Examination of mounting piece (UT Phased Array Technology

Module 15: WTG check – GE®•Tobecheckedapprox.every12monthonrequest 15.50 Diagnosis of base frame/generator support•Checkinggeneratorsupportforcracks(magnetic powder test)•UltrasoundandX-raytestingonrequest•Includingdocumentationandphotos 15.51 Repair of base frame or Live Time Service 1. One-off repair as required2. Continuous monitoring and repair up to the end of the operating time of the WTG 15.52 Measuring of machine base frame and generator support •Measuringofmachinebaseframe(photogrammetry) 15.53 Examination of drive train •Checkingforcracks/lateralcracksonrotorshaftbelowthe seat of the main bearing 15.54 Examination of foundation1. Examination of concrete foundations and reinforcement (Ground Penetration Radar) 2. Examination of mounting bracket (UT Phased Array Technology)

Technical availability (TA) is calculated as follows:

AE = (8.760 – MH) x N – DT (8.760 – MH) x N

AE: Availability achieved in the contractual year N: Number of WTGs covered by this agreement DT: Total time (hours) during which, according to the fault list, the WTG(s) was (were) technically unavailable during the contractual year MH: Normal annual maintenance time (hours) 8.760: Hours per year (365 x 24 hrs)

WindKeeper®

WindKeeper®

WindKeeper®

WindKeeper®

Basic Modular

Basic

Complete

Complete Modular

Maintenance Modules

Maintenance

Remote monito

ring 24/7

•Softwareandhardware

•Rem

otemonitoring

Wear p

arts package

Oil exchange

•Oilexch

ange(maingearb

ox)

•Oilexch

ange(yawgearring/pitchsystem)

•Oilexch

ange(hydraulics)

Maintenance of ro

tor blades

•Regularbladem

ainten

ance

Unscheduled Maintenance

•Materialsandexpenses

•Laborandtraveltim

es

Maintenance of fr

equency converter (G

E®)

•Materialsandexpenses

•Laborandtraveltim

es

Major c

omponents

Availabilit

y guarantee

Technical availa

bility (T

A)

calculation and re

port

Maintenance and re

placement

of safety components

BGV A3 & SF6 check

•BGVA3

check

•SF6Mainten

ance

Maintenance of e

xternal transform

er

station fo

r GE®

•Materialsandexpenses

•Laborandtraveltim

es

Inspectio

n of driv

e train L

•Freq

uencym

easuringandvisualinspection

•Laborandcostofmaterial

Inspectio

n of driv

e train XL

•Freq

uencym

easuringandvideoendoscopy

•Laborandtoolco

sts

CMS monito

ring and re

porting

•InstallationofCM

Sdevice

•Evaluationandreporting

1 2 3 4 5 6 7 8 9 10 11 12 13 L 13 XL 13 XXL

Optimization modules

Upgrades Vestas®

•14.01Carbo

nbrushhold

ers

•14.02Ventilationpackagetransformer

•14.03Slipringbo

xsuctionsystem

•14.04Yawdrivemonitoring

•14.05Replaceme

ntofrotorcables

•14.06Arc

sensor

•14.07Pe

rmanentlubricationsystemyaw

gearring

Upgrades GE®

•14.50Kidneyfiltrationsystemofmaingearboxoil

•14.51Positionmonitoringofgearbo

x

•14.52Gridcouplingcontactor

•14.53Pe

rmanentlubricationsystemofmainbearing

•14.54Permanentlubricationsystem

of

generator bearin

g

•14.55Permanentlubricationsystem

ofyawgear

•14.56Pe

rmanentlubricationsystemofpitchgearring

•14.57Axiscabinetventilation

•14.58Ice-freesensors

WTG check – Vestas®

•15.01Dia

gnosiso

fgeneratorsupport

•15.02Examinationofgearbo

x

•15.03Examinationofdrivetrain

•15.04Examinationoffoundations

WTG check – GE®

•15.50Diagnosisofbaseframe

/generatorsupport

•15.51Repairofbase

frame

orLiveTime

Service

•15.52Measu

ringofmachinebase

frame

and generator support

•15.53Examinationofdrivetrain

•15.54Examinationoffoundation

14 14 15 15

WindKeeper®

WindKeeper®

WindKeeper®

WindKeeper®

Basic Modular

Basic

Complete

Complete Modular

V Included in the contract Optional (please mark with a cross) Not included in the contract O –

These modules are available for selected Vestas® and GE® turbine types on inquiry. The service packages are available for Germany, Austria, Switzerland, Spain and Italy. All contracts are available in German and English.

“Vestas”isaregisteredtrademarkofVestasWindSystemsA/S,DK.“GE”isaregisteredtrademarkofGENERALELECTRICCOMPANY,US.

09/2012

Maintenance • Allmaintenancematerialsandsmallparts,maintenance of bolts and any costs of disposal • Includinglabor,expensesandalltools required for this work• Basedonthemaintenancespecifications(manufacturer) and extended maintenance documents (Availon)• CertifiedbyGermanischerLloyd(GL)

Module 1: Remote monitoring• PermanentsurveillanceofyourWTGs(24/7)• Immediateprocessingofreceivedfaultmessages (also on weekends and public holidays)• Faultsare(wherepossible)remediedonlinebytrained staff offering operators technical phone support

Module 2: Wear parts package• Includesthefollowingmaterialwithoutinstallation:

Vestas® Wear parts Replacementofair/oil/waterhosesGenerator power brushesGenerator grounding brushesIndependent power supplyLCTU brass core + lubricantHydraulic accumulator

GE® Components Wear partsUPS ......................................................... Battery pack Yaw brake ............................................ Pad - type B Pad - type A Hoses Secondary brake ............................. Brake pads - BSFH 300 Brake pads - BSFI Diaphragm accumulator ............ 0.32l Slipring gearbox ............................... Power brushes Generator ............................................ Power brushes 50 to 100 mm Battery trays ...................................... Battery trays Pitch motors ...................................... Carbon brushes

Module 3: Oil exchange• Changingofoilandoilfilterofthemainbearing, oftheyawgearring/pitchsystemandofthehydraulics (if applicable)• Includinglabor,expensesandalltoolsrequired for this oil exchange

Module 4: Maintenance of rotor blades• Inspectionoftheleadingandtrailingedgeofthe rotor blade as well as to the pressure and suction side on cracks, erosion, paint damage or other damages• 4-pointmeasuringofthelightningprotectionsystem• Inspectionofthelightningreceptor(s)fordamage caused by lightning strikes• Inspectionofthegluedconnectionsoftherotor blade on air inclusions, cracking and peeling• Inspectionoftherotorbladesealsforcracks,structural damage and functionality• Cleaningofthedrainageholes(ifapplicable)• Inspectionoftheflowelementsandtheleading edge protection tape (if applicable)• Detailedreportincludingimages• Repairsuptofourmanhoursincluded

Module 5: Unscheduled Maintenance• Remedyingofallfaults,requiringacallout• Includinglabor,expensesandalltoolsrequired• Exceptfordamageonmajorcomponentsand damage caused by force majeure • Alsoonweekendsandpublicholidays• Pleasereadthe*footnoteforWindKeeper® Basic Modular

Module 6: Maintenance of frequency converter (GE®)• Asspecifiedbymanufacturer

Module 7: Major components• Replacementandrepairofmajorcomponents• Includingmaterials,expenses,labor, all tools required and costs of crane for this work• Pleasereadthe*footnoteforWindKeeper® Complete Modular

Major components Vestas®• Rotorblades •Castingpartofhub• Bladebearings •Baseframe• Yawgearring •Gearbox• Generator •Tower•Mainbearingandmainshaft • Transformer(ifintegratedinWTG)

Major components GE®• Rotorblades •Castingpartofhub• Bladebearings •Baseframe• Yawgearring •Gearbox• Generator •Tower• Yawdrive •Mainbearingandmainshaft• Frequencyconverter• Transformer(ifintegratedinWTG)

Module 8: Availability guarantee• 95%averagetechnicalavailability1to3WTGs• 97%averagetechnicalavailabilityfor4andmoreWTGs•Whereaserviceagreementappliestomorethanone WTG, the average technical availability of all WTGs of the agreement is decisive (availability of wind farm) • Based on 12 hours of rotor blade maintenance every two years • Pleasereadthe*footnoteforWindKeeper® Complete Modular

Module 9: Technical availability (TA) calculation and report• Containsamonthlyandannualevaluationofthetechnical availability and production data • Includingmonthlyprovisionofresultsanddatadirectly to the client

Module 10: Maintenance and replacement of safety components• Checkingandreplacementofallsystemcomponentsof the WTG requiring testing and monitoring as required (excl. climb assist system and elevator)• Includingtravelexpensesofservicetechniciansused for this purpose • ExcludingcostsofexternalTÜVstaff

Module 10 for Vestas® V80/V90 (2 MW)EveryVestas®V80/V90containsrescueequipmentandaservice lift. The following is checked:• Ladderandclimbassistsystem• Rescueequipment(foreachWEAof1MWormore)• Crane• Servicelift(foreachWEAof1MWormore)• Personalequipmentprotectingagainstfalling(e.g.belt, safety rope and fall absorber)• Fireextinguishers,helmetandfirstaidbox(ifapplicable)

Module 10 for Vestas® V52 (850 KW)The following is checked:• Ladderandclimbassistsystem• Crane• Personalequipmentprotectingagainstfalling(e.g.belt, safety rope and fall absorber)• Fireextinguishers,helmet,rescuedeviceandfirstaidbox (if applicable for WTG)

Module 10 for GE®A service lift is not included in this category but could be ordered as an option. Only from a certain year of manufacture onwards were WTGs with a hub height of 100 m supplied with a service lift. The following is checked:• Ladderandclimbassistsystem• Crane• Personalequipmentprotectingagainstfalling(e.g.belt, safety rope and fall absorber)• Fireextinguishers,helmet,rescuedeviceandfirstaidbox (if applicable for WTG)• Servicelift(ifWTGcontainslift)

Module 11: BGV A3 & SF6 checkBGV A3 check:• Checkingoftheelectricalinstallation • AccordingtotherequirementsofBGVA3, DIN VDE 0105-100 and VDS clause 3602• Inspection,functionaltestingandmeasuring (including measuring report)• Promptremedyingofminorfaults SF6 check:• VisualinspectionofSF6,checkingoftorquesontheend seals, cleaning of connections, checking of SF6 gas and functional check of triggering relay • Includinglabor,expensesandalltoolsrequired for this work

Module 12: Maintenance of external transformer station for GE® medium voltage switchgear (MS)• Generalvisualinspectionincludingcheckingofthe MS system• Checkingofallboltedcontactsandswitchmechanisms• Includingcleaningandrelubricationofdrives• Trialswitchingincludingcheckingofauxiliaryswitches and of open circuit triggers• CleaningofentireMSsystem

Oil transformer• Generalvisualinspectionoftransformer• CheckingcableconnectionsonMVandLVside• Checkingoillevelandseal• Checkingtransformerguard• Cleaningoftransformer

LV system/compensation system• GeneralvisualinspectionandcheckingofLVsystem• Checkingofallboltedcontactsandswitchmechanisms• Trialswitchingincludingcheckingofauxiliaryswitches and of open circuit triggers (if applicable)• CleaningofentireLVsystem

Transformer room and accessory• Cleaningoftransformerroom• Checkingfunction,completenessandstationaccessory• Groundingmeasurement

Others:• Aftercompletionofthemaintenancework,thecustomer is issued a maintenance report

Module 13 L: Inspection of drive train L• Annualmanualmeasuringofthedrivetrainon site by frequency analysis using a peak analyzer and visual inspection• Includingmaterial,expenses,laborandalltools required for this work• Archivingofmeasureddataandimages(incaseof abnormalities)• Includingmeasuringordamagereportforclient (in case of abnormalities)

Module 13 XL: Inspection of drive train XL• Annualmanualmeasuringofthedrivetrainon site by frequency analysis using a peak analyzer and video endoscopy• Internalarchivingofmeasureddataandimages(incase of abnormalities)• Includingmeasuringordamagereportforclient(incase of abnormalities) • Includingmaterials,expenses,laborandalltools required for this work

Module 13 XXL: CMS monitoring and reporting• InstallationofaCMSdevice• Permanentmonitoringofsystem• RegularevaluationandreportingofdataofCMSmeasuring (in case of abnormalities)• Includingmaterials,expenses,laborandalltoolsrequired for the work

Maintenance Modules

Technical availability (TA) is calculated as follows:

AE = (8.760 – MH) x N – DT (8.760 – MH) x N

AE: Availability achieved in the contractual year N: Number of WTGs covered by this agreement DT: Total time (hours) during which, according to the fault list, the WTG(s) was (were) technically unavailable during the contractual year MH: Normal annual maintenance time (hours) 8.760: Hours per year (365 x 24 hrs)

Optimization modules Module 14: Upgrades Vestas®

14.01 Carbon brush holders•Newfixationconcept•Evenwearonleadingandtrailingside•Conservationofsliprings•Quickandsimplereplacementofcarbonbrushes•Safeandquickhandlingofinstallationwork•50%increaseinservicelifeofcarbonbrushes•Extendschangeintervalsfrom1to1.5years•Lowersreplacementcosts 14.02 Ventilation package transformer•Moreefficientventilationpackagefortransformer•Specialdeflectorsguidetheairthroughthenacelle•Only20%ofthecoolingairentersthetransformer (sufficient for cooling)•Preventssoiling,e.g.saltdeposits•Increasedservicelife 14.03 Slipring box suction system•Accurateextractionofairfromtheslipringroom•Automaticremovalofgraphitedustinaircurrent•Minizessusceptibilitytofaults(increasedtemperatures, spark formation, flashovers, short-circuiting)•Additionalcalloutsarenolongerrequired•Reducesworkforserviceengineer•Preventsdamagetogeneratorandtotalfailure

14.04 Yaw drive monitoring•Messuringofcurrentconsumptionofindividualactuators•Deviationfromnormaloperationisimmediatelyapparent (PLC compares rated current <–––> idle current)•Maincontrollerreactswithemergencyprogram(e.g. reduction of tracking steps)•Automaticfaultreportingtooperatorandservicestaff (GSM modules)•Repairscanbeplannedandcarriedoutpromptly•Shortandplannabledisruptionstoproduction•Minimumlossofyield

14.05 Replacement of rotor cables•Diagnosisofoverheatingduringvisualinspection (damaged cable must thus be replaced)•Cabletobereplacedwithcablewithlargerdiameter•Alsoeffectiveduringhigherloadingandstrong-windphases•Specialtoolsandworkprocessesdevelopedforthis operation ensures an efficient replacement•Noneedforanexternalcrane•Preventsoverheatingintheareaoftherotorcablesofthe generator •Preventsirreversibledamageandlossofyield

14.06 Arc sensor•Constantmonitoringofthecreationofarcsby2sensors (photoelectric cells)•Additionalthirdsensordirectlyincontrolcabinetnextto circuit breaker •SavedeactivationofSF6mediumvoltageswitchgearwithin milliseconds•Permanentmonitoringofcopperrailmaindistribution•Preventsseriousfiresandtotalloss

14.07 Permanent lubrication system yaw gear ring•Constantlubricationofyawpinionsandgearteeth•Preventscorrosion(nocorrosion–nowear)•Permanent, even lubrication film on gears•ImprovesWTGperformance

Module 14: Upgrades GE® 14.50 Kidney filtration system of main gearbox oil•Checkingoffiltrationofparticlesandoilageingproducts of at least 3 μm (standard from 10 μm)•Potentiallylongeroillifeduetoefficientcleaningofgearboxoil•Gearboxoilcanbechangedlessfrequently(60months+)•Additivesremaindissolvedingearboxoil 14.51 Position monitoring of gearbox•Permanentmonitoringofpositionofgearboxbytwo sensors•Earlydetectionofpotentialdamageonmainbearing•Automaticstopincaseofpositionalchange(gearboxisnot damaged)•Immediatefaultnotificationviaremotemonitoring•Preventscostlyconsequentialdamagecausedbyincreased loading in planetary bearing

14.52 Grid coupling contactor•Relievesthecircuitbreakerasprotectionelementagainst overcurrent and undervoltage

•Reducesswitchingoperationstoamax.of20-30/year (normally 2,500 to 3,000)•Designedfor250,000switchingcyclesatratedcurrent•Preventsincreasedwear,thermaloverloading, malfunctioning•PreventsnearlyalldamagetoFCandgeneratorcausedby the malfunctioning of the circuit breaker•InstallationandconfigurationforeachWTGinnomore than 2 days 14.53 Permanent lubrication system of main bearing •Continuouslubricationandsupply•Independentsystemforeachseparatebearing•Preventsduplicatelubricationduringmaintenance•Lowwear•Preventsexcessiveandinsufficientlubrication•Increasestheservicelifeofthemainbearings 14.54 Permanent lubrication system of generator bearing•Continuouslubrication/supplyoffastrunninggenerator bearing•Independentsystemforeachseparatebearing•Preventsduplicatelubricationduringmaintenance•Lowwear•Preventsexcessiveandinsufficientlubrication•Increasestheservicelifeofthegeneratorbearings 14.55 Permanent lubrication system of yaw gear•Continuouslubricationyawpinions/gears•Preventscorrosion•Additionallyinstalledweatherprotectiondirectlycatches any dripping lubricant•Preventsfurthersoilingoftowerandcontaminationofthe environment •Improvesprovisionofcoolingairtothedrivetrainthrough additional ventilation hole in nacelle floor 14.56 Permanent lubrication system of pitch gear ring•Permanent,evenlubricationfilmongears•Hardfoampinionsuppliesthegearofthedrivewitha thin, even lubricating film •Relievesthegearringsoftherotorblades•Only¼ofthegearringisloadedduringoperation•Nocorrosion–nowear•ImprovesWTGperformance•Preventscostlydistortionofbladebearing 14.57 Axis cabinet ventilation •Optimumandcontinuousambienttemperatureof pitching battery is ensured by battery heating and insulation of control cabinet •Preventsheatlossandprematurefailureofbatterycaused by cold •Increasestheservicelifeofthepitchingbattery•Preventsmajorfluctuationsintemperature•Pitchingbatteriesrequirelessfrequentchanges

14.58 Ice-free sensors •Weathersensorswithhigh-performance230V heating•Preventsicingoverofanemometerandwindvane•GuaranteesnormaloperationoftheWTGevenunder extreme temperatures •Temperaturerangeofbetween–40°Cand+60°C•Highmechanicalstabilityduetodouble-screenedstainless steel ball bearings (anemometer)•Maximumaccuracyduetomagneticallydampened wind vane•Worldwidetriedandtestedsystem

Module 15: WTG check – Vestas®•Tobecheckedapprox.every12monthonrequest 15.01 Diagnosis of generator support•Includescheckinggeneratorsupportforcracks(magnetic powder test)•UltrasoundandX-raytestingonrequest•Includingdocumentationandphotos

15.02 Examination of gearbox•Tobecheckedapprox.every12monthonrequest special test methods for different types of gearbox in their installed state (camera and ultrasound test method)•Includingdocumentation 15.03 Examination of drive train•Checkingforcracks/lateralcracksonrotorshaftbelowthe seat of the main bearing

15.04 Examination of foundations1. Examination of concrete foundations and reinforcement (Ground Penetration Radar) 2. Examination of mounting piece (UT Phased Array Technology

Module 15: WTG check – GE®•Tobecheckedapprox.every12monthonrequest 15.50 Diagnosis of base frame/generator support•Checkinggeneratorsupportforcracks(magnetic powder test)•UltrasoundandX-raytestingonrequest•Includingdocumentationandphotos 15.51 Repair of base frame or Live Time Service 1. One-off repair as required2. Continuous monitoring and repair up to the end of the operating time of the WTG 15.52 Measuring of machine base frame and generator support •Measuringofmachinebaseframe(photogrammetry) 15.53 Examination of drive train •Checkingforcracks/lateralcracksonrotorshaftbelowthe seat of the main bearing 15.54 Examination of foundation1. Examination of concrete foundations and reinforcement (Ground Penetration Radar) 2. Examination of mounting bracket (UT Phased Array Technology)

Maintenance

Remote monito

ring 24/7

•Softwareandhardware

•Rem

otemonitoring

Wear p

arts package

Oil exchange

•Oilexch

ange(maingearb

ox)

•Oilexch

ange(yawgearring/pitchsystem)

•Oilexch

ange(hydraulics)

Maintenance of ro

tor blades

•Regularbladem

ainten

ance

Unscheduled Maintenance

•Materialsandexpenses

•Laborandtraveltim

es

Maintenance of fr

equency converter (G

E®)

•Materialsandexpenses

•Laborandtraveltim

es

Major c

omponents

Availabilit

y guarantee

Technical availa

bility (T

A)

calculation and re

port

Maintenance and re

placement

of safety components

BGV A3 & SF6 check

•BGVA3

check

•SF6Mainten

ance

Maintenance of e

xternal transform

er

station fo

r GE®

•Materialsandexpenses

•Laborandtraveltim

es

Inspectio

n of driv

e train L

•Freq

uencym

easuringandvisualinspection

•Laborandcostofmaterial

Inspectio

n of driv

e train XL

•Freq

uencym

easuringandvideoendoscopy

•Laborandtoolco

sts

CMS monito

ring and re

porting

•InstallationofCM

Sdevice

•Evaluationandreporting

Upgrades Vestas®

•14.01Carbo

nbrushhold

ers

•14.02Ventilationpackagetransformer

•14.03Slipringbo

xsuctionsystem

•14.04Yawdrivemonitoring

•14.05Replaceme

ntofrotorcables

•14.06Arc

sensor

•14.07Pe

rmanentlubricationsystemyaw

gearring

Upgrades GE®

•14.50Kidneyfiltrationsystemofmaingearboxoil

•14.51Positionmonitoringofgearbo

x

•14.52Gridcouplingcontactor

•14.53Pe

rmanentlubricationsystemofmainbearing

•14.54Permanentlubricationsystem

of

generator bearin

g

•14.55Permanentlubricationsystem

ofyawgear

•14.56Pe

rmanentlubricationsystemofpitchgearring

•14.57Axiscabinetventilation

•14.58Ice-freesensors

WTG check – Vestas®

•15.01Dia

gnosiso

fgeneratorsupport

•15.02Examinationofgearbo

x

•15.03Examinationofdrivetrain

•15.04Examinationoffoundations

WTG check – GE®

•15.50Diagnosisofbaseframe

/generatorsupport

•15.51Repairofbase

frame

orLiveTime

Service

•15.52Measu

ringofmachinebase

frame

and generator support

•15.53Examinationofdrivetrain

•15.54Examinationoffoundation

09/2012