Overhaul of a 20-Ton Slip-Ring Rotor

In July our EMZ engineers removed a slip-ring rotor from a cement works in the Netherlands for a major overhaul.

With a weight of 20 tons, an output of 1,700 kW and an operating voltage of 10,000 V, this mill drive was no lightweight. The EMZ service team travelled to the Netherlands to partially disassemble the rotor on site and then to prepare it for carriage on a special heavy-duty transporter.


At the same time, the drive will be modified so that the existing carbon-brush lifting appliance is replaced by permanently-mounted carbon brushes. To this purpose, a new slip-ring housing must be calculated and constructed for the new application.

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