The MV100 3400 HP, a UL certified variable speed drive of the INGEDRIVE ™ range, is integrated in the grinding system of a copper mine in Nevada, USA.
In the first quarter of 2020, the commissioning of the medium-voltage variable speed drive for starting up the SAG and ball mills was successfully completed using the SBRS (Start Ball Run SAG) system. This system starts up the ball mill progressively until it reaches its rated speed, at which point the drive synchronizes the ball mill to the grid frequency to switch to fixed speed operation. After that, it is connected to the SAG mill which works at a variable speed while remaining under control by the drive at all times.
Besides the frequency converter, Ingeteam also supplied the transformers and the cabinet with the bypass contactors.