Free State Transformers
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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
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
Free State Transformers
Transformer Design & Manufacturing
Transformer Repairs
Transformer Field Services
Miniature Substat
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
12/11/2025
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Telephone
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 |