High voltage engineering services

Design and project management of conventional air-insulated outdoor substations (AIS), gas-insulated indoor substations (GIS) and cellular-type indoor substations (AICS) from 11kV up to and including 400kV

State of the art, cost-effective solutions

PSW Engineers have immense in-depth experience and offer an array of engineering disciplines which include electrical, mechanical and electronic services

Renewable Energy Network Design

Design, approval and implementation of the balance-of-plant electrical network for independent renewable projects

High Voltage Substations

Specialising in conventional outdoor, gas insulated and cellular-type indoor substations from 11kV up to and including 400kV.

Power Distribution

Specialising in power distribution projects which include overhead power lines and high voltage underground power cables.

Renewable Energy

Specialising in renewable energy projects which include the design of balance-of-plant electrical networks and ESKOM grid connections.

Contact us for more detail on the services we offer

PSW Consulting Engineers

A professional consulting engineering company offering a range of services for municipalities, parastatals and other industrial and commercial clients.

Conventional Outdoor Substations (AIS)

Conventional outdoor substations can be designed to suit a client’s particular requirements.  Individual items of equipment are dependent on the substation’s voltage level, busbar scheme and number of feeders and air-insulated substations require a relatively large area of land which needs to be fenced.

Gas Insulated Indoor Substations (GIS)

Gas insulated substations generally are used in space constrained areas.  Because of the compactness of the equipment which only requires a small area of land and minimal civil work resulting in substantial savings and makes GIS compatible with AIS at higher voltages.

Cellular Type Indoor Substations (AICS)

Innovative design and development of specialised equipment make air-insulated cellular indoor substation designs viable through the use of local outdoor-type equipment within a building.  More than 15 cellular indoor substations have been designed.

Years of Operation


Substations Built


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17 Quintin Brand Street, Persequor Park, Pretoria, Gauteng, South Africa

+27 12 349-2253

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