Distribution Transformers

Distribution Transformer Design and Manufacture

Free State Transformers is an established designer and manufacturer of industry leading, durable Distribution Transformers. These quality products are manufactured to our strict SANS 780 manufacturing standards.  Our ISO 9001:2015 certification underlines the quality of all our products.

Distribution Transformers
Distribution Transformers
Distribution Transformers up to 3.15MVA!

Free State Transformers manufactures Distribution Transformers from 16kVA up to 3.15MVA with voltages up to 33 kV. 

Speak to our friendly, expert sales team today to discuss your needs for Free State Transformers Distribution Transformers!
Manufacture, Install and Maintain!

Free State Transformers has an expert team that can manufacture, install and maintain your Transformers. Speak to our friendly sales team today to discuss your needs!


These Transformers are the popular and commonly produced type of Transformers. They range from small pole mounted transformers to very large transformers seen openly in distribution yards and substations. Typically robust oil-natural, air natural (ONAN) cooling is used due to the remoteness of the installation site and added complexity of other cooling options.

  • RANGE: 5kVA – 5000kVA
  • PRIMARY VOLTAGES: up to 33kV
  • TAPPINGS: External Tapping connection (single phase) or of circuit Tap-switch (OCTS)
  • TERMINATIONS: HV Outdoor open bushings or HV & LV cable boxes
  • TANK CONSTRUCTION: Sealed welded cover or sealed bolted cover.
  • MOUNTING ARRANGEMENT: Pole mounting with brackets or flat base for pole mounting platform mounting
What is Distribution Transformers?

A distribution transformer or service transformer is a transformer that provides the final voltage transformation in the electric power distribution system, stepping down the voltage used in the distribution lines to the level used by the customer. The invention of a practical efficient transformer made AC power distribution feasible; a system using distribution transformers was demonstrated as early as 1882.

If mounted on a utility pole, they are called pole-mount transformers. If the distribution lines are located at ground level or underground, distribution transformers are mounted on concrete pads and locked in steel cases, thus known as distribution tap pad-mount transformers.

Distribution transformers normally have ratings less than 200 kVA, although some national standards can allow for units up to 5000 kVA to be described as distribution transformers. Since distribution transformers are energized for 24 hours a day (even when they don’t carry any load), reducing iron losses has an important role in their design. As they usually don’t operate at full load, they are designed to have maximum efficiency at lower loads. To have a better efficiency, voltage regulation in these transformers should be kept to a minimum. Hence they are designed to have small leakage reactance.~ Source: Wikipedia