Offshore WIND’s photo of the day: Liebherr Heavy Lift Offshore Crane, type CAL 45000-1200 Litronic, is installing rotor blades at the Global Tech I offshore wind farm in the German part of the North Sea.
Liebherr’s new heavy lift offshore crane CAL 45000-1200 Litronic® started with the installation of AREVA Wind’s rotor stars at Global Tech I in early March. The crane is part of the jack-up vessel Vidar , owned by Hochtief Solutions.
CAL 45000-1200 Litronic is designed as “crane around the leg” (CAL). It is able to rotate 360° around one of the four jack-up legs of the vessel. The crane achieves a maximum lifting capacity of 1,200 t at a maximum working radius of 27.5 m.
During the installation, rotor stars were first lifted horizontally and then rotated to the vertical position by using a special pivoting crossbar. At a height of about 92 m above the water surface, the rotor stars were then fixed to the nacelle.
Offshore WIND Staff, July 10, 2014; Image: Liebherr (Used on Offshore WIND with permission)