News
Control Techniques Awarded South African Steel Contract
Control Techniques (Pty) SA have recently been awarded a
contract by a South African company, Columbus Stainless (Pty) Ltd
in Middelburg, Mpumalanga Province. Columbus Stainless is South
Africa's only producer of stainless steel flat products and the
Middelburg plant, situated in the 'Heartland of the Ndebele,' is a
technologically-advanced, fully-integrated, single-site operation
that has the flexibility to adjust quickly to market changes. Some
of their products are for domestic consumption, while the remainder
are exported throughout the world.
The contract was to supply the controls for the new bridle and
transport drives at the entry section of one of their anneal and
pickling lines. This contract is the largest of a number of
projects where Control Techniques drives are replacing older drives
and a total of 19 drives have been supplied for the new entry
section.
The drive system panel suite was designed, built and
commissioned by Control Techniques (Pty) SA at their Drive Centre
in Kya Sands. The scope of the system is to control 16 wringer roll
motors, each 5.5kW, 4-pole, 525 volt geared motors, plus two 110kW
, 525 volt bridle motors and a 30kW exhaust fan. Each of the ringer
roll motors is controlled by a 7.5kW panel-mounted Unidrive SP AC
drive and the larger bridle motors have 110kW modular Unidrive SPMD
drives with regenerative mode for accuracy of tension control and
maximum efficiency saving. Each drive is fitted with additional
specialist modules for Profibus communications, as well as a
powerful second processor module for distributed control.
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