human settlementS
from top RIGHT One of Lufhereng Substation’s transformers (Photo: F&J Electrical) One of the substation's control schemes (Photo: F&J Electrical) An aerial view of the newly completed substation (Photo: City of Johannesburg) Mayor Parks Tau and Matshidiso Mfikoe, MMC: Environment and Infrastructure Services, unveil a plaque at Lufhereng Substation (Photo: City of Johannesburg)
work, with the construction of the substation’s platform, involving bulk earthworks, the installation of the earth mat, the construction of the HV (high-voltage) equipment foundations and oil catchment pit, the erection of the steel structure for the HV equipment and, of course, facilitating entry to the substation with the construction of a bitumen-asphalt-topped access road. Getting the primary plant components up and running required the design, supply and installation of 132 kV SF6 outdoor breakers, 132 kV CTs (current transformers) and VTs (voltage transformers), the stringing of twin bull conductors, the installation of surge arrestors and post insulators, the installation of 11 kV SBV3 switchgear, with Vamp arc protection, and the installation of two 45 MVA, 132 kV/11 kV transformers. Secondar y plant activity focused on protection and control, which included the design, supply and installation of Siprotec numerical relays and three 45 MVA 88 kV/11 kV transformer schemes. This required two 132 kV incomers schemes, a bus zone scheme and 28 x 11 kV schemes, as well as a FAT (factor y acceptance tested) and SAT (security administration tooled) protection system and two 45 MVA 132 kV/11 kV transformers. Minister Lindiwe Added to the substation’s protection and control, Sisulu an integrated CCTV access control and intruder detection system and a fire detection system were implemented. The final link in the chain of control was the installation of a fibre-optic cable between Roodetown Substation, in Roodepoort, and the Lufhereng Substation. The principal contractor responsible for this work was F&J Electrical, who subcontracted the design and engineering of the protection schemes for the 132 kV (five bays and bus zone panel) and 11 kV (21 bays) network systems’ outdoor and indoor switchgear, as well as the design of the interlocking philosophy and transfer scheme on the 11 kV level, to Neural Network Engineering. As Minister of Human Settlements Lindiwe Sisulu said in her 2016 budget vote, “South Africa’s Breaking New Ground policy is the best way to respond to urbanisation, to plan better and also to develop affordable rental and social houses for young people who are moving to the cities and for low-income earners. “These catalytic projects are designed to trigger investments from the private sector and, with our estimated R90 billion input over five years, we estimate an additional R150 billion will come from the private sector. In the process, hundreds of thousands of jobs will be sustained and thousands more created.”
“These catalytic projects are designed to trigger investments from the private sector.”
IMIESA September 2016
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