Free State Transformers

Free State Transformers Transformer Design & Manufacturing
Transformer Repairs
Transformer Field Services
Miniature Substat

We are currently the largest manufacturer of transformers in the Free State province of South Africa. Free State Transformers have the capability to design and manufacture a wide range of power and distribution transformers, miniature substations and special application transformers raging from 5kVA to 40MVA with rated voltages up to 132kV. All products are designed and manufactured to applicable

local and international specifications. Our products are used in utilities, municipalities and industries across Africa

⚡ Did you know?Many transformer failures are caused by incorrect sizing or poor manufacturing quality, not the load itse...
12/04/2026

⚡ Did you know?
Many transformer failures are caused by incorrect sizing or poor manufacturing quality, not the load itself.
That’s why selecting the right transformer and working with reliable manufacturers is critical for long-term performance.
We specialize in custom-built transformers and miniature substations, manufactured locally with SABS-approved standards.
Reliable power starts with the right design.

📢 If you are planning a project, need guidance or a quotation? Message me, I'd be happy to help.

Bernadette Opperman
+27 82 822 3760
[email protected]











17/03/2026
19/01/2026

Transformer Design & Manufacturing
Transformer Repairs
Transformer Field Services
Miniature Substat

STOCK Available: | DEC 2025Open Bushings Al Windings:1 x 16kVA/11/4204 x 25kVA/11/4202 x 25kVA/22/4206 x 25k/33kV/4201 x...
15/12/2025

STOCK Available: | DEC 2025

Open Bushings Al Windings:
1 x 16kVA/11/420
4 x 25kVA/11/420
2 x 25kVA/22/420
6 x 25k/33kV/420

1 x 50kVA/6.6&11/420
1 x 50kVA/6.6/420

5 x 50kVA/11/420
3 x 50kVA/22/420
14 x 50/33/420

With Cable boxes:
1 x 50kVA/525/400
1 x 100kVA/525/400
1 x 250kVA/525/400

1 x 100kVA/6.6/420
5 x 100kVA/11/420
6 x 100kVA/22/420
6 x 100kVA/33/420

3 x 160kVA/33/420

5 x 200kVA/11/420
2 x 200kVA/22/420
5 x 200kVA/33/420
3 x 250kVA/33/420

5 x 315kVA/11/420
5 x 315kVA/22/420
3 x 315kVA/33/420

With Cable boxes:
4 x 500kVA/11/420
5 x 630kVA/11/420
2 x 800kVA/11/420
1 x 1000kVA/11/420

1 x 1600kVA/11/420
2 x 2500kVA/11/420

*Minisub Stations:*
2 x 500kVA/11/420 | Cu Windings

1 x 630kVA/11/420 | Al Windings

*NEC/NER*
1 x 360A/11kV / Sold

*NEC/NER/Aux*
1 x 360A/11kV/100kVA

*Intermediate Voltage Transformers:*
Al Windings:

1 x 5kVA/3.3kV YY

2 x 10kVA/1kV YY

4 x 16kVA/3.3 YY
2 x 16kVA /1kV Dyn11

2 x 25kVA/1kV YY
1 x 25kVA/3.3kV YNd1
2 x 25kVA/3.3kV Dyn11

1 x 35kVA /3.3 Dyn11
1 x 35kVA/3.3 YY

1 x 50kVA/3.3kV YY
1 x 50kVA/3.3kV Dyn11

2 x 75kVA/3.3kV Dyn11

2 x 100kVA /3.3kV YY
2 x 100kVA/3.3kV YNd1

1 x 150kVA/3.3kV YY

1 x 200kVA/3.3kV Dyn11
1 x 200kVA /3.3kV YNd1

● PLEASE CONFIRM AVAILABILITY

Bernadette Opperman
[email protected]
Free State Transformers

Address

29 George Lubbe Street; Hamilton
Bloemfontein
9301

Opening Hours

Monday 07:30 - 16:45
Tuesday 07:30 - 16:45
Wednesday 07:30 - 16:45
Thursday 07:30 - 16:45
Friday 07:30 - 16:45

Telephone

+27828223760

Website

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