Case note ACS 1000 variable speed drives reduce downtime and increase conveying capacity of bauxite mine Challenge Bauxite from Worsley Alumina’s mine in Western Australia, is transported to a refinery 51 km away by a conveyor. This conveyor was originally driven by DC drives, which did not deliver the required levels of reliability, thus leading to high maintenance. Downtime was occurring with one motor having to be inspected every six wee

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