Power Transformers Divisional News – First High-Rated AutoTransformer

First High-Rated AutoTransformer


power-transformers-schaapkop-jan-11-largeACTOM Power Transformers produces first high-rated autotransformer since plant upgrade

Since completing a major upgrade and extension of its Wadeville, Germiston, plant three years ago, ACTOM Power Transformers has designed, manufactured and supplied its first large Eskom spec autotransformer – a 120 MVA unit – which is to be installed in George Municipality’s new 132 kV/66 kV/11 kV Schaapkop main intake substation currently under construction.

The autotransformer underwent final tests at ACTOM Power Transformers’ plant in October 2010 and was delivered to site in November.

ACTOM Power Systems is responsible for the construction of the new substation, having been awarded a R65-million turnkey contract for this by BDE Consulting Engineers of George on behalf of George Municipality at the beginning of 2009.

Other ACTOM companies supplying equipment for Schaapkop, which will augment main power supply to George currently provided by the 132 kV/66 kV Blanco substation, are ACTOM High Voltage Equipment and ACTOM MV Switchgear.

Ronnie Russell, ACTOM Power Transformers’ General Manager, said: “Our production of this first 120 MVA Eskom spec autotransformer for Schaapkop represents an important milestone for us, as it is by far the largest autotransformer we have produced so far – the previous largest being 40 MVA units.

“An important spinoff of this is that it enhances our standing with Eskom in securing orders for similar autotransformers in the future,” he added.

The autotransformer for Schaapkop incorporates a 10 MVA 11 kV tertiary winding as backup supply for new residential and commercial developments in George in the vicinity of the new substation, as well as for additional supply of power to an established regional sewerage works and recently completed sewerage water recycling plant nearby.

Danie de Vries, principal engineer for BDE Consulting Engineers, commended ACTOM Power Systems on its co-operativeness and competence in executing the contract – due for completion in February 2011 – and timeous delivery of equipment. “We have found them very willing to adapt to changing requirements as they have arisen and the fact that they were able to offer us a locally designed and manufactured autotransformer, which we would otherwise have had to purchase from abroad, was a major positive factor in their favour,” he commented.

The Schaapkop substation comprises two 132 kV incomer bays, which are designed to accommodate up to three power transformers eventually, as well as 15 x 66 kV feeder bays, two 66 kV bus section bays and two 66 kV bus coupler bays. Initially a temporary supply will be routed to the substation while the upstream Eskom infrastructure is constructed.

The R30-million upgrade and extension of ACTOM Power Transformers’ plant, completed towards the end of 2007, raised the upper power rating limit of the company’s product from 45 MVA at 132 kV to 160 MVA at 161 kV. At the same time the plant’s production capacity was increased by 50% to a total of 2250 MVA per annum.

ACTOM (Pty) Ltd is the largest manufacturer and distributor of electrical equipment in South Africa, employing about 6 000 people and with an annual order intake in excess of R5bn. It is a black empowered company with 27operating units, 22 production facilities and 25 distribution centres throughout South Africa.

ACTOM partners Alstom France for environmental equipment and in serving the maintenance, upgrade and retrofit market for larger boilers, as well as for railway transport activities.

ACTOM holds exclusive distribution, technology and representation rights for Alstom Grid (formerly the Transmission business of Areva T&D) in Southern Africa and maintains management, technical and commercial links to Alstom Grid business units in Europe.

Following the acquisition by Schneider Electric of the global Distribution business of Areva T&D, the distribution, technology and representation agreements that existed between ACTOM and Areva will remain in place until such time as a new agreement has been concluded.

ACTOM formerly traded under the name Alstom South Africa and re-branded to ACTOM in September 2009.


For further information contact John McClure, ACTOM Power Systems
Private Bag 1, Bramley 2018
Tel (011) 430-8700 Fax (011) 887-9009
E-mail john.mcclure@actom.co.za

Date:  January 31, 2011.

Caption:  The 120 MVA autotransformer for the new Schaapkop substation undergoes testing at ACTOM Power Transformers’ test facility.