Reliability on a roll

The 125 A ABB drive used on the application incorporates a swinging choke to reduce the effects of harmonics. It also employs ABB flux optimisation feature, making it more efficient than the previous drive.

"Although the main objective of the project was not energy saving, we estimate that Celsa will be saving in the region of 30 percent on its energy costs for this drive,” says Doug Pitt of ABB authorised value provider, APDS, which installed the drives.