Medupi and Kusile’s air-cooled condensers
ACTOM Electrical Machines, South Africa’s leading designers, manufacturers and suppliers of electric motors, has completed manufacture of all the customised low voltage motors required for the air-cooled condenser (ACC) units at Eskom’s new Medupi and Kusile coal-fired power stations.
The company was awarded the ACC units LV motors contract for Kusile power station near Delmas in Mpumalanga in August 2009 by Johannesburg-based SPX (DB Thermal), the ACC subcontractor to Alstom Power, the main contractor for the turbines of the new power station. This followed the award in November 2008 of the ACC units LV motors contract for Medupi power station near Lephalale in Limpopo Province by GEA Aircooled System, the ACC subcontractor to Alstom Power in that instance.
The Medupi and Kusile ACC motors contracts together are worth close to R100-million.
The contract, for design, manufacture and supply of a total of 384 x 250 kW 4-pole squirrel cage induction motors, along with soft-starters, for the ACC units at Kusile was completed well ahead of schedule, while the Medupi contract, comprising a total of 384 x 225 kW 4-pole squirrel cage induction motors, has been completed on schedule.
Said Tony Teixeira, ACTOM Electrical Machines’ General Manager: “In tackling the Kusile contract we benefitted greatly from the experience we gained on the Medupi contract, but it involved some unique challenges of its own.”
The earlier contract involved designing and developing motors that incorporated additional equipment without compromising their efficiency. To ensure that this was achieved the company first produced a prototype motor, which it test ran to ensure that the contract’s stringent performance specifications were met before it went ahead with production of the final product.
“The motors for Kusile follow the same design concept as developed for Medupi’s ACC units. However the soft-starters required for the Kusile motors necessitated a similar preliminary test exercise, for which we developed a simulation process to test the soft starter-motor-load combination to ensure that it worked at optimum efficiency,” Teixeira explained.
“We designed and assembled a special item of equipment to simulate the actual site conditions. These prototype tests were witnessed and approved by SPX, Alstom and Eskom.”
ACTOM (Pty) Ltd is the largest manufacturer, repairer and distributor of electro-mechanical equipment and provider of turnkey solutions in Southern Africa, employing about 7 500 people with an annual order intake in excess of R7.5bn. It is a black empowered company with 42 operating units, 43 production, service and repair facilities, and 36 distribution outlets throughout Southern Africa.
ACTOM holds numerous technology, distribution and value added reseller agreements with various partners, both locally and internationally.
For further information contact Antonio Teixeira, ACTOM Electrical Machines
PO Box 1026, Benoni 1500
Tel (011) 899-1081 Fax (011) 899-1371
Press release compiled by Julian Kraft, J Kraft Public Relations
PO Box 2826 Wilropark 1731
Tel (011) 472-6686 Fax 086-613-9657
Date: February 28, 2013
Caption: Two members of ACTOM Electrical Machines’ factory staff are seen here doing finishing touches to one among a large batch of 250 kW squirrel cage induction motors awaiting delivery to SPX for installation in air-cooled condensers for Kusile power station.