The toppling of a Vestas 2 MW V80 turbine at Schneeberg in Germany on December 18 was caused by a break in the foundation flange after an unauthorised welding. Vestas further says the accident, which caused only material damage, happened during a test of the turbine's emergency stop system. The faulty weld was a one-off incident, says Vestas.
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Senior Renewable Energy Analyst (WindGEMINI Product Lead) DNV GL Bristol (City Centre), City of Bristol