Reduce South Africa’s electrical distribution transformer losses – revise SANS 780

By A Amadi and Prof J de Kock (North-West University)

 

Published in:

Electricity+Control, December 2014 (pages 10 – 15)

Enquiries: Tel. 018 299 1970 or email jan.dekock@nwu.ac.za

 

Download the full article on Reduce South Africa’s electrical distribution transformer losses – revise SANS 780 in PDF format.

 

South African authorities and associated bodies to consider revising the current transformer standards (such as SANS 780) and also adopting new standards and technologies to reduce transmission losses. The unavoidable losses in the country’s transmission and distribution networks include transformer losses. Distribution transformer losses account for an estimated one third of the total electricity network losses prompting us to use more efficient transformers to realise cost savings for consumers and freeing up generation capacity relief. The majority of users of distribution transformers in the South African market such as Eskom, large municipalities, mines and large industries specify or base their specification on the SANS 780, 4th edition (2009) for maximum component losses that include the no-load and load losses.

 

Take note

  • The ongoing pressure on South Africa’s power stations should give rise to a revision of transformer standards such as SANS 780.
  • The unavoidable losses in the country’s transmission and distribution networks include transformer losses.
  • Distribution transformer losses account for an estimated one third of the total electricity network losses.