Original Equipment Manufacturer of Power Transformers

ACTOM Power Transformers (APT) is a leading South African manufacturer of high-voltage transformers, with advanced facilities in Wadeville and Pretoria delivering solutions up to 500 MVA and 400 kV. Serving utilities, mining, industry, data centres, and renewable energy sectors, APT provides complete transformer solutions including manufacturing, installation, maintenance, and real-time condition monitoring services.

INDUSTRIES

Mining

Utilities

Data Centres

Renewable Energy

OUR PROCESS

Engineering Design

Our design team is locally established in South Africa with an average of 30 years' design experience and is equipped with globally leading design analysis software. Through our experience, we have developed strong engineering partnerships with internationally renowned transformer specialists.

Manufacturing Capability

Our robust supply chain management allows for the design and fabrication of tanks on site. We have two standalone test bays equipped for testing to IEC 60076 standards. Our fully integrated manufacturing capabilities encompass:

Vertical and horizontal coil winding
Vacuum oven for coil drying and processing
Assembly bays for the active part
Vapour phase for active part processing
Tanking
Painting booths
160-ton cranage

Test Facilities

2 Standalone Test bays
Testing to IEC 60076
Impulse Generation up to 2,4MV
BIL levels up to 1050kV
- Lightning impulse
- Chopped wave
- Switching Impulse
PD testing and diagnostics
Temperature rise tests
Oil temperature recording
Noise level tests
Oil Analysis
Comprehensive test reports
Factory acceptance test (FAT) data packs

Delivery, Assembly, Commissioning

We transport to site, including across the border into Africa, with in-transit detection of impact on transformers. A sweep frequency response analysis is done at the factory and again at site to demonstrate transformer condition.

Once at site, the transformer is offloaded using specialist equipment and assembled, including the oil filling, by our delivery team. Professionals then conduct cold commissioning according to the site acceptance testing requirement, using our own equipment. For delivery in foreign countries, supervision of installation is provided.

Condition Monitoring

Service level agreements are provisioned to give clients access to online monitoring, and also to conduct proactive monitoring on the clients' behalf. Teams go on site to do basic maintenance, oil dissolved gas analysis with period sampling and lab analysis. Annual reporting is provided, derived from on-site visits and online data gathering.