The INNOVATIVE Small Wind Turbine

EUNICE WIND, is a member company of the EUNICE ENERGY GROUP and actually is the manufacturing company of the EW-16 THETIS, the Small Wind Turbine with a rated power of 50kW.

EUNICE WIND‘s factory is in the west of Attica, approximately 30km from the centre of Athens, and is housed under 1500m2 of private onwed facilities. Because of the factory’s vertical production line; EUNICE WIND is equipped only with CNC machines, high accuracy electrical equipement for the Workshop, the E-lab and the Assembly Hall of the company.

EW-16 THETIS is an advanced and reliable  three-bladed horizontal-axis Small Wind Turbine (SWT), upwind orientated, certified under the IEC 61400-2 standard.

EW-16 THETIS has a gearless drive-train, uses minimum mechanical parts, and requires no hydraulic braking system; thus, it increases efficiency, reduces downtimes, and safeguards optimum energy yield.

EW-16 THETIS was designed in Germany and is being manufactured in Greece, using German and European quality components. All the applicable standards and infrastructure methods are applied.

More about our THETIS...

Our 50 kW product is also a fully speed variable and stall regulated Small Wind Turbine; thus, there is no need for pitch drives, pitch bearings and a slip ring unit.

The three-blade rotor is mounted to a welded rotor hub. This hub is directly connected to the permanent magnet synchronous generator.

Due to its innovative drive train design, the SWT is gearless and it also has no hydraulic system, which identifies a highly efficient and low maintenance product.

At the second shaft end, the brake disk with an electrical brake is located. EW-16 THETIS is stopped electrically via the generator, which can supply power to the grid down to 0rpm. In case of the grid fault, this energy feeds electrical resistors. The electrical failsafe brake is only activated in case of any error on the generator or the frequency converter.

The generator is bolted on a main frame. Underneath this main frame the yaw bearing is positioned. As a yaw bearing, a fully capsulated slew drive was chosen with a worm and gear transmission. A yaw brake is not needed in this design.

The nacelle is covered by a Glass Fibre reinforced Plastic (GRP) housing. Inside the nacelle there is also a small electrical cabinet. Two masts are mounted on the nacelle, one for wind vane and anemometer, one as a lightning arrester.

The nacelle with the rotor are mounted on the top of a tubular steel tower that reach hub heights of 22 meters.

The control cabinet of the EW-16 THETIS can be found at the bottom. The PLC control system and the pulse-width modulated IGBT converter are inside this cabinet. The cabinet is equipped with a display to monitor and to manually control the SWT. Components for lightning protection, UPS power supply and Ethernet connection are also placed inside the cabinet. Via this Ethernet connection, both the owner and the EUNICE WIND Service staff can monitor the EW-16 THETIS and make diagnosis of any errors of the machine.

The flat foundation is optimized for the individual soil conditions of each installation site.

The design and calculation of the SWT is made according to IEC 61400-2. It fulfills the local utility requirements according to VDE AR M 410S. An adaption at any other electrical requirement is possible.

Power Curve

The high energy yield of EW-16 Thetis, even at low wind sites, makes it ideal for projects like:

  • small wind farms
  • stand-alone solutions
  • wind-diesel systems
  • agricultural or industry centers
  • community buildings
The most significant advantages of EW-16 Thetis are:
  • Direct drive (gearless)
  • Power regulation
  • Active yaw adjustment
  • Smooth and quiet operation
  • Low maintenance
  • Simple and proven technology
  • Designed in accordance with IEC 61400-2

Safety

The EW-16 THETIS leads a safe path to the future with its highly effective safety systems.

These include:

  • Three independent braking systems
  • Rotational speed monitoring
  • Wind speed monitoring
  • Temperature monitoring
  • Ice formation monitoring
  • Overvoltage protection system
  • Grid monitoring
  • Emergency power supply in case of power failure
  • Two voltage-independent safety processors

Technical

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