Reliability and efficiency increased while costs dropped dramatically, when mining company replaced an unreli- able diesel engine with an electrical motor controlled by a VLT® AutomationDrive. On the Danube, close to the town of Kovin in Serbia, a mining barge excavates gravel from the riverbed up to 30m depth and prepares the ground for another vessel to mine coal from a depth of up to 40m. Before installing the drive the excavator was pow

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