REpower 3.2M114. [3.2M/114/50 Hz] Product Description Preliminary Version

Transcription

1 REpower 3.2M114 Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 1 of 21

2 REpower Systems AG Überseering Hamburg Tel.: Fax: Copyright 2010 REpower Systems AG All rights reserved. Protection Notice DIN ISO 16016: The reproduction, distribution and utilization of this document as well as the communication of its contents to others without explicit authorization in writing of REpower Systems AG is prohibited. Offenders will be held liable for the payment of damages. All rights reserved in the event of the grant of a patent, utility model or design. Disclaimer Please ensure to use the applicable specifications in their latest versions. Images do not necessarily reflect the exact scope of supply and are subject to technical alterations at any time. Please note that this document can not necessarily correspond with the projectspecific requirements. Possible work procedures shown in this product description comply with German and the REpower s own safety provisions and regulations. The national laws of other countries may provide for further safety specifications. It is essential that all precautionary measures, both project- and country-specific, be strictly complied with. It is the duty of each customer to inform itself, implement and observe these measures. The applicability and validity of the relevant legal and/or contractual provisions, the technical guidelines, DIN standards and other comparable regulations is not excluded by the contents or demonstrations contained in product description. Moreover these provisions and regulations shall continue to apply without any limitation. All information contained in this product description are subject to change at any time without notice or approval by the customer. REpower Systems AG assumes no liability for any errors or omissions in the content of this product description. Legal claims against REpower Systems AG based on damage caused by the use or non-use of the information offered here or the use of erroneous or incomplete information are excluded. All brands or product names mentioned in this document are the property of their respective holders. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 2 of 21

3 Table of Contents Applicable Documents... 4 List of Abbreviations and Units...5 List of Figures General Information Design Key-Facts Mechanical System Rotor Rotor blades Rotor hub Blade pitch Blade colours and reflexions Nacelle Yaw System Suspension Concept Gear Box Tower Electrical System Principle of Operation Technical Data Medium Voltage Side WEC Standard Configuration WEC Grid Protection Settings Standard WEC Main Components Generator Converter Transformer System Own Consumption Safety System Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 3 of 21

4 4.1 General Safety Brakes Lightning Protection Wind Turbine Control Cut-In / Cut-Out strategy Control System Masses & Dimensions Weights Dimensions Applicable Documents The following documents are mentioned within this document. Title Electrical properties according to IEC Standard Conditions Of Use Document no. D-3.1-GP.EL.06-A-*-EN SD-3.1-WT.SC.01-A-*-EN Standard Grid Conditions 1 SD-2.5-EC.GR.01-B-*-EN * Depending on the project specific selection of REpower products the respective documents will appear in each case as separate amendments of the contract in their actual version. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 4 of 21

5 List of Abbreviations and Units Abbreviation/Unit Description DIBt Deutsches Institut für Bautechnik EMC Electromagnetic Compatibility ETS External Transformer System FGW Fördergesellschaft Windenergie e.v. f N GL GRP HV IEC IGBT I N ITS LV MV n PG P N PPE PT RAL SCADA U C U N WEC Rated frequency Germanischer Lloyd Glass-fibre reinforced plastic High voltage (nominal grid voltage 60kV) International Electrotechnical Commission Insulated Gate Bipolar Transistor Nominal current Internal Transformer System Low voltage (nominal grid voltage 1 kv) Medium voltage (nominal grid voltage > 1 kv and < 60 kv) Rated generator speed Nominal power generator Nominal active power WEC Personal Protective Equipment Nominal power transformer German institute for Quality Assurance and Certification e.v. Supervisory Control and Data Acquisition Declared high voltage (supply voltage) Nominal voltage Wind Energy Converter (equal to Wind Turbine Generator System [WTGS] or Wind Turbine [WT] Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 5 of 21

6 List of Figures Figure 1: Steady State & dynamical Frequency Range List of Tables Table 1 General Technical Data... 8 Table 2 Technical Data Rotor Blades... 9 Table 3 Technical Data Blade Pitch Table 4 Technical Data Yaw System Table 5 Technical Data Gear Box Table 6 Technical Data Tower Table 7 Technical Data for REpower 3.2M114 standard configuration at medium voltage side of the WEC Table 8: Standard grid protection settings at medium voltage side of the WEC Table 9 Technical Data Generator Table 10 Technical Data Converter Table 11 Cut-In / Cut-Out strategy Table 12 Technical Data Control System Table 13 Weights Table 14: Dimensions blade Table 15 Dimensions hub Table 16 Dimensions nacelle Table 17 Dimensions drive train Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 6 of 21

7 1 General Information The REpower 3.XM is the latest REpower onshore wind energy converter (WEC) platform which is developed on the basis of the evolutionary development and the operational experience with more than installed MD and MM WEC. The REpower 3.XM has been developed starting from the qualities of the MD- and MM-series such as ease of maintenance, clear, sturdy construction, generous and conservative design of the components, environmental compatibility and excellent grid compatibility. 1.1 Design Key-Facts After the extensive analysis of various existing and upcoming WEC and component technologies the REpower 3.2M114 can be characterised by the same design key-facts the REpower 3.4M104. Therefore the general technical concept features the following elements: Variable generator speed control system with a six pole doubly-fed asynchronous generator Water cooled IGBT converters Electrical single blade pitch with fail-safe design 3-point suspension of mechanical drive train Tilted-Cone concept & pre-bent rotor blades Reliable gearbox concept Internal dry type cast resin transformer system with forced air cooling Ladder guided service-lift Service friendly design Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 7 of 21

8 2 Mechanical System 2.1 Rotor The rotor consists of three rotor blades that are flange-mounted on the cast hub via a pivoted double row four-point contact bearing. The rotor blades can thus be adjusted along their linear axis via electrical pitch drives that rotate with the blades. The electrical blade pitch is used to limit the rotational speed of the rotor and the power output. Furthermore, the pitch system is the main brake of the WEC. In order to ensure the continued operation of the blade adjustment in the event of a power failure or malfunction, each blade has its own, independent storage battery set that rotates with the blade. In the partial load range, i.e. when the WEC is operated below the rated power, the turbine works at a constant blade pitch and variable speed to exploit the optimum rotor aerodynamics. Within the nominal load area, i.e. when the WEC has reached its maximum rotor speed, it operates with a constant nominal torque which is given by the generator. Changes of the wind speed are controlled by the blade pitch. Wind energy from strong gusts can be stored by an acceleration of the rotor and only then converted into damped electrical energy via the blade pitch and fed into the grid. The use of the tilted-cone concept with a 4.0 tilted blade connection on the hub and prebent rotor blades in conjunction with a 5 incline of the whole drive train allow an extremely short overhang of the nacelle between the rotor and the tower. This provides a good weight balance of the whole nacelle and a safe load transfer into the tower top without transmitting a high flux of force over a long distance via the main frame. Technical Data Rotor Rotor diameter 114 m Swept area 10,207 m 2 Speed range appr % min -1 Maximum tip speed 75.2 m/s Rotor axis inclination 5 Rotor cone angle 4.0 Sense of rotation Rotor position clockwise up-wind Table 1 General Technical Data Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 8 of 21

9 2.1.1 Rotor blades The blade design for the REpower 3.2M114 comprises a strong structure to face high wind loads but also lightweight construction to minimise the load transmission to the nacelle. This is realised by the use of glass-fibre reinforced plastic (GRP) sandwich construction which provides the needed material properties. The blades have also been improved for high aerodynamic efficiency and thus to reduce the noise emissions of the WEC. A special UV-resistant gel coat surface on the blades protects the blade structure against penetration of moisture and minimises erosion on exposed areas like e.g. the front-edge of the blade. Technical Data Rotor Blades Number of rotor blades 3 Rotor blade length Blade material 55.8 m Glass-fibre reinforced plastics (GRP) Table 2 Technical Data Rotor Blades Rotor hub The rotor hub is made out of cast iron and is the connecting point for the 3 rotor blades and the main shaft. To ensure a high level of service friendliness, the hub can be accessed directly from the nacelle via man holes without having to leave the WEC interior. Persons entering the hub are not exposed to environmental influences. Furthermore, it is possible to communicate and pass tools or spare parts through the man holes Blade pitch As already described in chapter 2.1, the blades are flange-mounted on the hub via a blade bearing so that they can rotate along their longitudinal axis. The rotation of the blades is performed by pitch drives which are attached individually to each blade and feature individual controller systems. In order to synchronise the individual blade adjustments, an additional synchronisation controller is used. The safe operation of the turbine in case of grid loss or WEC malfunction is ensured by independent uninterrupted power supplies for each pitch drive. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 9 of 21

10 Technical Data Blade Pitch Principle Power control Electrical drive, single blade pitch Blade pitch and rotor speed control Maximum blade angle 91 Pitch rate at safety shut-down Pitch drives approx. 6-7 /s synchronised DC motors with battery buffer Table 3 Technical Data Blade Pitch Blade colours and reflexions The blades are coloured in the colour light grey (RAL 7035) which is a standard colour. It reduces the effects of reflexion efficiently while having no influence on the power curve. Furthermore the blades can be coloured with different red/orange markings which are available optionally. 2.2 Nacelle To meet today's demands on an innovative WEC, the housing of the nacelle has been designed by a renowned designer. The result is an aerodynamic and ergonomic design which has been generously dimensioned to create sufficient conditions for service and maintenance. Maintenance work can be carried out with a closed nacelle housing, avoiding that persons get exposed to environmental influences. In case of a replacement of bigger components the housing of the nacelle can be opened for access. For the housing material glass-fibre reinforced plastic (GRP) was chosen, as it offers a reliable protection and is also very light. The housing fulfils the functions of protection for persons, sound insulation as well as the function to keep the optimal operating temperatures. Access from the tower to the nacelle is possible via hatches in the base frame. The lower nacelle housing is designed as a floor in order to ensure that the components below the base frame can also be reached. The switch cabinets for the converter as well as the converter system and the water cooling system are mounted in nacelle. All components, such as the yaw system or the hydraulics, can be operated from the control system in the nacelle. An emergency stop button has also been installed for safety reasons. Furthermore, all moving parts within the nacelle are covered to minimise the risk of injuries as much as possible. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 10 of 21

11 2.2.1 Yaw System The nacelle is connected to the tower via a contact bearing. Yawing of the nacelle is achieved by means of electrical yaw drives. Hydraulic brake callipers keep the nacelle in the wind direction and keep the yaw drives mostly free of loads which might occur from besides inflow angles in horizontal or vertical axis. The brakes are also active in a currentless state. An electronic wind direction sensor with the corresponding software controls the switch-on times and direction of rotation of the motors. It also ensures the automatic cable untwist if the nacelle changes its position several times in one direction with changing wind conditions. While the turbine is yawing the brakes are released to avoid additional loads on the yaw drives. Technical Data Yaw System Type Yaw rate Bearing 4 geared drives, 18 yaw brakes 0.5 /s four-point bearing with external toothing Table 4 Technical Data Yaw System Suspension Concept The drive train is supported at three points immediately above the head flange of the tower. The fore side suspension is carried out by a generously dimensioned spherical roller bearing. The two other suspension points are the torque arms of the gearbox which are balanced by elastomer bushings. The three point suspension allows a safe load transfer along with a significant tolerance of the drive train alignment Gear Box The gear box is designed as a planetary / helical gear. The toothing has been adapted with respect to efficiency and noise emission. Elastic bushings are integrated in the torque arm of the gear that rest on the base frame via support pieces. The elastic bearing allows an effective sound and vibration decoupling from the main frame. The gearbox design is carried out according to the internal REpower gearbox guideline which asks for higher safety factors than e.g. the DIN/ISO or GL (Germanischer Lloyd) guidelines. In order to monitor the condition of the gear box, every REpower 3.2M114 features an oil particle counter. Based on inductive measurement principles, this device is measuring the particles in the gear box oil lubrication system thus it helps to detect gearbox failures in a very early stage. It will trigger an alarm in the Reguard Online Monitoring if certain thresholds are Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 11 of 21

12 exceeded. Furthermore all data regarding the oil particle counter will be stored and accessible via the REguard Web Reporting for analysis. Technical Data Gear Box Type 3 stage planetary/spur-gear system nominal power approx. 3,470 kw nominal torque approx. 2,750 knm Ratio approx Table 5 Technical Data Gear Box 2.3 Tower The tower is designed as a conical, tubular steel tower consisting of between three and five segments depending on the hub height. There is a door in the tower base that permits access to the to the tower bottom and from inside the tower (thus protected against inclement weather) via a ladder with climb protection system to the nacelle. Each segment of the tower is equipped with platforms and emergency lighting. The transformer is mounted in the tower bottom and protected against unauthorised access. For safety an "Emergency Stop" button is installed in the tower base. The turbine can also be operated via a control display in the tower bottom. The electrical transmission via the tower is carried out by shielded bus bars which are an additional feature to minimise electromagnetic interference. Every REpower 3.2M114 will be equipped with a service lift as a standard. The service lift is intended to be used only by a maximum of two persons but must never exceed a maximum payload of 250kg. Technical Data Tower Type coned solid wall steel tower * hub heights** diameter of head flange 93 m and 123m 3.0 m diameter of bottom flange 4.3 m * for hub height 123m: concrete-steel tower ** the hub heights are depending on the foundation design Table 6 Technical Data Tower Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 12 of 21

13 3 Electrical System 3.1 Principle of Operation The wind turbine is equipped with a variable speed generator/converter system. This allows the speed to be adjusted within a range of +/-40 % of the synchronous speed (incl. dynamical range). Together with the electrical pitch adjusting system, variable speed operation assures very good results as regards energy yield, efficiency, mechanical stressing and power quality. The system avoids surges and peak loads to the greatest possible extent. Operating control provided for the generator allows uniform power export with minimal fluctuation in the partial load range. The WEC can be operated at nearly constant power in the nominal load range. The general ability to generate reactive power also allows targeted management of reactive power in accordance with customer and network operator requirements by adding optional products. The functional principle of this variable speed generator is based upon the concept of the socalled asynchronous, double-fed slip ring generator with a converter which takes advantage of IGBT technology. The system assures continuous power generation with voltage and frequency matched to the grid, regardless of rotor speed. Speed and power adjust themselves automatically according to prevailing wind speed. The turbine operates in the following operating ranges depending on the prevalent wind speed: In the sub-synchronous operating mode (partial load range) the generator feeds 100% electrical power to the grid. In addition, slip power is supplied to the rotor from the converter via the generator s slip rings. In the over-synchronous operating mode (nominal load range), the generator feeds approximately 83% electrical power directly to the grid, which does not have to be fed via the converter. Remaining power (approx. 17%) is fed to the grid from the rotor via the frequency converter. Amongst others, advantages of the system include low loss which assures high overall efficiency, and outstanding availability due to the compact design with a minimal number of components. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 13 of 21

14 3.2 Technical Data Medium Voltage Side WEC Standard Configuration WEC The REpower 3.2M114 standard configuration is defined as described at Table 7. Parameter Value Nominal power P = kw (Medium Voltage Side) Power factor cos phi ~ 1 Nominal voltage (MV side) 10kV / 20 kv / 30kV Voltage range at MV terminals 1 of the WEC (cos phi = 1) 90% U N 110% Rated frequency 50 Hz nominal current at cos phi = 1 and nominal voltage I = 183 A [10kV] I = 92 A [20kV] I = 61 A [30kV] Rated generator speed n = 1200 RPM Table 7 Technical Data for REpower 3.2M114 standard configuration at medium voltage side of the WEC The REpower wind turbine stays connected to the grid even if the grid frequency at grid side changes between 47.5 Hz and 52.0 Hz and the voltage is within the permissible voltage range. Further the REpower wind turbine stays connected during dynamical grid frequency changes down to 47.0 Hz. The frequency range between 47.0 Hz to 47.5 Hz is temporarily limited to maximal 1 min. During this time the voltage has to be close to nominal voltage. Figure 1 describes Extended Steady State & Dynamic Frequency Range for active power production. 1 The automatic tab changer of the wind farm transformer in the medium-voltage system must assure that line voltage does not drop below nominal voltage for a longer period of time. If the line voltage is below nominal voltage for a longer period of time electrical power production could be reduced. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 14 of 21

15 Figure 1: Steady State & Dynamic Frequency Range The standard grid protection settings for minimum and maximum frequency are adjustable parameters which can be set within the frequency range described at figure 1. Within the Restricted Operating Zone in figure 1 an active power reduction is possible. The reactive power production may be affected in the Extended Steady State & Dynamic Frequency Range. By adding optional REpower Grid Products and/or REguard Products electrical capabilities and control functionalities for the single wind turbine and/or the wind farm can be extended, to fulfil project specific network requirements and manage power plant tasks within the wind farm. 2 The electrical properties for the REpower wind turbine 3.2M114 are defined within the documents Electrical Properties according to FGW and Electrical Properties according to IEC, see chapter Applicable Documents within this document. If the quality of the grid complies with the parameters described within the document Standard Grid Conditions, see chapter Applicable Documents within this document, then the values in table 7 shall be met. 2 Corresponding values described in table 7 and table 8 shall change if optional products are chosen. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 15 of 21

16 3.2.2 Grid Protection Settings Standard WEC To identify single-phase and three-phase faults the WEC control includes grid monitoring to measure the current and voltage in all phases. The grid monitoring analyses the current, voltage and the fluctuation of the respective values in time to disconnect the generator and converter immediately from the grid if necessary and disconnect the WEC from the grid if any of the events in table 8 occur. Trigger Event Trigger Value comments Over voltage [U >] (symmetrical/asymmetrical) Under voltage [U <] (symmetrical/asymmetrical) 1.1*U N 0.90*U N Setting values shall be defined together with the responsible network operator Setting values shall be defined together with the responsible network operator Over frequency [f >] 50.5 Hz Setting values shall be defined together with the responsible network operator Under frequency [f <] 49.5 Hz Setting values shall be defined together with the responsible network operator Table 8: Standard grid protection settings at medium voltage side of the WEC The standard grid protection settings can be investigated and adjusted project wise depending on the additional REpower Grid Products. In case of an event in table 8, the WEC will resume to normal operation after grid recovery. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 16 of 21

17 3.3 Main Components Generator Technical Data Generator Concept: Nominal power / speed: Asynchronous double-fed generator with rotor power recovery to the grid via the frequency converter. The stator winding is synchronised to the low-voltage side, and is connected directly to the grid with a soft cut-in. Pel = ~3600 kw at n = 1200 RPM (±50 kw depending upon manufacturer) Speed range: n = 650 to 1200 RPM (dynamic to 1400 RPM) There is a specific maximum power value associated with each rotational speed, and this power value must not be exceeded on average for design reasons. Type: Six pole, 3-phase asynchronous slip-ring generator Model: IM B3 acc. to DIN IEC code I IM 1001 acc. to DIN IEC code II Size: 630 Protection: IP 54 (except slip ring IP 23) Cooling: Surface mounted air-air heat exchanger. External airflow is generated by an external fan. Cooling air is drawn from inside the nacelle. Sensors: PT 100 for monitoring bearings PT 100 for monitoring coils Brush wear warning Miscellaneous: Covers ensure that no contact can be made with rotating parts. Table 9 Technical Data Generator The generator housing is earthed for potential compensation. The generator is borne on sound and vibration-decoupling elements on the base frame for better sound insulation. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 17 of 21

18 3.3.2 Converter Technical Data Converter Concept: Function: Power semiconductors: Frequency converter for asynchronous, double-fed generator with DC intermediate link. Control/regulation of active and reactive power. Recovery of rotor power via generator and grid side inverters. IGBTs Protection: IP 54, inductor field: IP 21 Cooling: Forced air cooling of converter compartment. Water cooling system for IGBTs. Table 10 Technical Data Converter Transformer System The REpower 3.2M114 features a MV switchgear and a compact dry type cast resin transformer which is located inside of the tower. For further details please see the document Internal Transformer System [3.XM/50Hz] 3.4 Own Consumption Power required by the WEC in the standby mode is comprised of the individual requirements of the following components: Controls (control computer and converter) Yaw drives Hydraulic pump Heating for gearbox, generator and control cabinets Battery charger control drive units during diferent operation modes Obstacle Lightning Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 18 of 21

19 Power requirements do not exceed approximately 40 kw (10 minute mean value). House load depends to a great extent upon location. Energy requirements are particularly high when wind speed is less than 4 metres per second in combination with frost. Values may thus fluctuate by several orders of magnitude between coastal and inland locations. A ballpark figure of between 8300 and kwh per year can be assumed at locations with medium wind speeds, although significant deviations, both upward and downward, are possible. These specifications do not take upstream components into consideration (e.g. transformer and auxiliary equipment, as well as medium and low-voltage cabling). 4 Safety System 4.1 General Safety As all REpower turbines the REpower 3.2M114 is designed for highest possible operational safety. This is generally linked to: Fail-Safe aerodynamic brake by the use of independent blade adjustment system Turbine controller independent safety chains Protection against external emission of liquids by the use of labyrinths and collecting trays Coverage of rotating parts in the turbine for the safety of individuals Generous space in the nacelle for service and maintenance Internal access to the hub from the nacelle 4.2 Brakes Braking is carried out with an aerodynamic brake by adjusting the rotor blades in the 90 blade position. Each of the three blade pitches can work independently. In the event of a power failure the drives are supplied via their independent storage batteries. The twist of one blade is enough to bring the turbine into a safe speed range. This leads to a triple redundant safety system. Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 19 of 21

20 The secondary brake system is a mechanical disk brake which is also activated if one of the primary safety systems fails and stops the rotor in conjunction with the blade adjustment system. The brake systems are designed for a "fail-safe" function. This means that if only one component in the brake system malfunctions or fails, the turbine immediately switches to a safe status. 4.3 Lightning Protection The wind turbine is fitted with a lighting protection system compliant to the requirements of the international standards IEC Edit.1 Wind turbine generator systems - Part 24: Lightning protection and IEC Protection against lightning - Part 1: General principles lightning protection class 1. The lightning is attracted to the receptors on the rotor blades and in case of a lightning strike it is discharged from the rotor to the tower via the slip rings and spark gaps. The lighting current is thus discharged to the ground via the foundation or a deep earth electrode. 5 Wind Turbine Control 5.1 Cut-In / Cut-Out strategy The design parameters for turbine operation are within the following range of 10min average wind speeds: Cut-In / Cut-Out strategy cut-in wind speed rated wind speed cut-out wind speed 3.0 m/s approx m/s 22.0 m/s Table 11 Cut-In / Cut-Out strategy Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 20 of 21

21 5.2 Control System The control system REguard Control B allows the integration of the REpower 3.2M114 into the REpower SCADA system REguard. REguard Control B is a micro-processor based turbine controller. For the signal transfer optical fibres are used. As a standard the turbine has to be equipped with the REguard Monitoring in the Advanced or Professional level. REguard Monitoring allows direct access to the turbine controller REguard Control B and other REguard devices installed at site like REguard Grid Station or REguard Meteo Station. Depending on the user level the REguard Monitoring visualises current operational as well as historical data which is stored on the turbine controller. The controller box is mounted in the nacelle and an additional display allows turbine operation also from the tower bottom. Technical Data Control System type signal transfer remote control micro-processor optical fibres REguard Monitoring Table 12 Technical Data Control System 6 Masses & Dimensions The REpower 3.2M114 is generally designed for easy transport and erection. Therefore the weights are roughly kept at the same level as the MM-series. The possibility to install nacelle and drive train separately allows the use of the same crane equipment as for the MM-series. 6.1 Weights Weights rotor blade hub complete incl. pitch system nacelle (excl. rotor and drive train) drive train (rotor shaft and gearbox) 14 t 23 t 58 t 52 t Table 13 Weights Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 21 of 21

22 6.2 Dimensions Dimensions Blade length height 55.8 m 4.0 m Table 14: Dimensions blade Dimensions Hub width height 4.2 m 3.8 m Table 15 Dimensions hub Dimensions Nacelle length width height 13 m 4.2 m 4.3 m (can be lowered to 3.8m) Table 16 Dimensions nacelle Dimensions Drive train (rotor shaft and gear box) length width height 6.9 m 3.4 m 3.1 m Table 17 Dimensions drive train Document-No.: PD-3.2-WT.WT.01-A-B-EN Page 22 of 21