Powertech Transformers, previously known as ABB Powertech Transformers based in Pretoria West, is 80% owned by Power Technologies (Pty) Ltd (Powertech), the largest power-electrical group in Southern Africa and 20% owned by Power Matla.  Powertech, is a wholly owned subsidiary of Altron (Allied Electronics Corporation Limited). Powertech is focused on delivering advanced technologies for the creation, management, distribution, storage and use of electricity across industries.
Power and distribution transformers for the African continent are manufactured by Powertech Transformers at its operations in Pretoria West, Cape Town and Johannesburg.

The Pretoria West facility is the biggest and most sophisticated transformer manufacturing plant in the Southern Hemisphere and one of the largest in the world. The range of transformers manufactured by Powertech Transformers cover three-phase and single-phase units, auto-transformers, shunt reactors, rectifier transformers including many others which are tailor-made to meet customers' exact requirements.

Powertech Transformers, a subsidiary of Powertech and the JSE listed Altron Group is pleased to announce that, a contract was entered into between PTT and Eskom for the supply of 12 generator step-up transformers over a seven year period.

Powertech Transformers, a subsidiary of Powertech and the JSE listed Altron Group is pleased to announce that, a contract was entered into between PTT and Eskom for the supply of approximately 300 miniature substation units over an eighteen month period starting from 1 April 2010.