Columbus Stainless (Pty)

VAI Industries, Sheffield. Middelburg, South Africa

the project

Anneal and Pickle Line 2 (AP2) process line upgrade.

the solution

The project required the use of a variable speed 16 Section masterdrive Dual AFE AC drive system for a continuous annealing and pickle Line 2 (AP2) enhancement. Siemens S7 PLC’s and WinCC SCADA with profibus communications were utilised for the overall control.

The enhancement project entailed the addition of a new skin pass mill, tension leveller, additional exit looper, edge trimmer, associated tensioning bridles, transport rolls, and a new drive and control system.

A major consideration for the customer was the instability of the electricity supply. Power dips were frequently experienced and the selection of an active front end regenerative rectifier unit with a common DC bus enabled these disruptions to be significantly reduced.


Sign up to our newsletter to receive information about our products and events.