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Cracked shaft possible cause of Repower turbine collapse  

Credit:  14 December 2015 by Jan Dodd | Windpower Monthly | www.windpowermonthly.com ~~

Preliminary results of an investigation into a turbine collapse in France indicate a fault in the machine’s shaft caused the rotor to fall to the ground.

The rotor sheared off a Repower MD77-1500kW turbine in north-east France on 10 November

On 10 November, the rotor sheared off a Repower MD77-1500kW turbine at Menil-la-Horgne, in the Meuse department of north-east France.

According to investigations so far, the cause of the accident is presumed to be “a slag inclusion in the shaft”, explained a spokesperson at Wpd Windmanager, which took over operational management of the plant from French project operator Theolia in early November.

In other words, it appears a fault in the main shaft connecting the rotor with the gearbox cracked open as the shaft became fatigued.

Senvion, which was known as Repower when the turbines were installed, said that it could not comment until the full investigation to identify the exact cause was completed.

The project, comprising seven Repower MD77 turbines, was commissioned in 2007. It was developed by Wpd and built by ABOWind, and is now owned by Eoliennes Suroit SNC, based in Colmar, north-east France.

The remaining six turbines are still out of service, waiting for permission from the French authorities to restart them, Wpd Windmanager said.

Source:  14 December 2015 by Jan Dodd | Windpower Monthly | www.windpowermonthly.com

This article is the work of the source indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this article resides with the author or publisher indicated. As part of its noncommercial effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Send requests to excerpt, general inquiries, and comments via e-mail.

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