Gearbox replacement at lofty heights The 22.5 MW wind farm in Spremberg, Brandenburg, Germany, generates 59 million kilowatt hours of electricity annually, which is sufficient for the needs of around 17,000 households – as long as the farm is running. A gearbox malfunctioned in 2013. Due to manufacturer bankruptcy, one of the nine wind turbines lay idle for several months. Deutsche Windtechnik then saved the operator from further yield losses. With a hub height of 145 metres, the Spremberg wind farm was the highest lattice mast wind farm in the world at the time it was built. Instead of tubular steel or concrete, the manufacturer Fuhrländer used lattice masts for the towers of the inland model FL2500, reducing the amount of material needed and the total weight. Making repairs and replacing

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