Earlier this year, the City of Tshwane awarded two contracts worth R200 million to Actom Power Systems to revamp the Pyramid and Kentron substations following extensive fire damage. In both instances, the initial focus is on constructing new control and switchgear buildings to house the replacement equipment.

Thereafter, Power Systems will supply, install and cable up a total of 109 new 11 kV switchgear panels – 49 for Pyramid and 60 for Kentron – including associated protection schemes, a Scada overlay, and DC chargers with battery backup.

The replacement 11 kV switchboards will consist of the modern premier class AMV12 brand of switchgear developed by Actom MV Switchgear in conjunction with an international partner and now well proven in the local market.

“Impromptu repairs were carried out by the municipality to restore power supply as quickly as possible, but the longer-term security of supply shall remain compromised until permanent solutions are implemented, which is what we are doing now,” explains John McClure, GM at Power Systems.

Phased equipment upgrade

Both substations will receive a major upgrade over the three-year contract term, as annual funds are released. New outdoor equipment includes 132 kV circuit breakers, isolators, current transformers, voltage transformers and surge arrestors supplied by Actom High Voltage Equipment. In addition, the cable and cabling accessories required for the works will be sourced from Actom Electrical Products.

For both contracts, Power Systems is obligated to involve and upskill local labour under the Extended Public Works Programme and earmark sections of work for local subcontractor participation.