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Siemens Energy has installed a 4 MW wind turbine prototype in Osterild, Denmark.

The new SWT-4.0 wind turbine is based on the technology of the SWT-3.6, a Siemens offshore wind turbine. The 4 MW turbine prototype is initially equipped with the standard 120-meter rotor of the 3.6 MW turbine but will soon be upgraded with a 130-meter rotor using 63-meter-long rotor blades.

Siemens says the SWT-4.0-130 will be for sale with the 130-meter rotor diameter beginning in spring 2013. Serial production of the SWT-4.0-130 is planned for 2015.



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