Introduction: The proportionally higher costs associated with creating and maintaining a unit protected interconnected network at 11kV are under increased scrutiny when benchmarked against conventional radial systems. This project aims find an alternative with similar performance at lower cost with the view of reducing capital expenditure.

Objectives: This project seeks to investigate, design and specify an alternative switchgear / protection arrangement to the 11kV unit protected substations in the urban areas of the SP Manweb network.