Transformer Upgrading Project

The TCTA Eastern Basin Water Treatment Plant currently neutralises feed water as abstracted from the defunct underground workings. The current infrastructure, illustrated in figure 1, of the plant includes three transformers, all fed from Eskom’s 6.6kV line, which is linked to the existing MV (Medium Voltage) board. These transformers serve the crucial function of stepping down the voltage to 400V for operational purposes. Transformers 1, 2, and 3 are rated at 3500kVA, 2000kVA, and 2000kVA, respectively.
Of note, Transformer 1 operates in parallel with two generators, one rated at 1600kVA and the other at 2000kVA. This parallel configuration ensures redundancy and reliability in power supply, especially for critical equipment within the plant. The generators are integral components in maintaining uninterrupted power flow to essential operations, providing a backup in case of any unforeseen power disruptions.
Nafasi Water’s Engineering team has been approached to provide the engineering and preliminary design services, as defined below, associated with the proposed installation of a fourth (4) transformer, taking into consideration the required modification to the existing MV switchgear. This is to accommodate the new transformer (4) and interfacing it with the existing LV MCC 1 and Genset and balancing the loading between transformer 1 and 4 at LV MCC 1. This service would entail the review of the plant existing electrical design information (to be provided by TCTA), audit the available information and then scope the works, define the project and interface requirements associated with the transformer (4) installation.