The City of Ekurhuleni energy team has finished work on the transformer at the 66kV main supply substation.
Areas including Glen Marais and Aston Manor have been restored.
A section of Edleen has been restored and two faults were found in the process.
READ INITIAL STORY: No restoration time for large Kempton Park power outage
Faults were detected on both sides of the 66kV ring network.
Further testing is underway on the 66kV ring network.