Liebherr has delivered two 200 EC-H 10 FR.tronic tower cranes to the Lavgan Dockyard in Maharashtra, India, 300km south of Mumbai. Both cranes are mounted on rail-going portals for permanent use in the ship repair yard.
Up to six ships can be repaired at the same time in the yard, and ships with a length of up to 130 metres and 10,000 DWT (dead weight tons) can undergo maintenance work in up to six berths in the dry dock and three wet berths.
The tower cranes have a load moment of 200 metre-tonnes and are used to position heavy components which are being replaced as part of repair work on ships.
The loads must be moved with great precision during the repair work, which is made possible by the infinitely adjustable drive units developed by Liebherr. The crane’s operation has electronic support in the form of wind force movement control, oscillation damping and MICROMOVE fine positioning system for positioning the load.
Both cranes were erected with a hook height and radius of 50 metres each which means that they can achieve a lifting capacity at the tip of the jib of 3,400 kg. The maximum load capacity is 10 tonnes.
To allow work to be completed throughout the entire length of the ships, the cranes are mounted on rail-going portals which carry a generator on the integrated platform to provide the cranes with an independent power supply.
Each of the four chassis is powered by a 7.5 kW electric motor, enabling the cranes to move softly yet quickly at speeds of up to 21.1 m/min on the tracks which extend over a length of around 120 m.
To prevent corrosion from saltwater the crane components are protected by a special coating for maritime use, and the housing of the electronic equipment is made of stainless steel. The climatic conditions also meant that an air-conditioning system was required for the control cabinet to prevent the formation of condensation.
Safety features include an ABB operating-range limiting system and AKS anti-collision system.
Lavgan Dockyard Ltd. is part of the Chowgule Group which has grown from a small trading company into a large group since it was founded in 1916. The Chowgule Group is active in sectors such as shipping, shipbuilding, export and mining.