Comprehensive Solutions for High-Voltage Power Transformers
GTA ENGINEERING LIMITED provides specialized services for power transformer repair, reconditioning, testing, and commissioning both at our factory and on-site locations.
We handle transformers ranging from 7.5 MVA to 300 MVA with voltage classes up to 400 kV, delivering reliable solutions that ensure optimal performance, safety, and an extended service life. We carry out the complete restoration of faulty and aged transformers.
We enhance transformer performance and extend operational life through:
- Oil filtration, regeneration, dehydration, and degassing.
- Insulation system upgrading.
- Drying of active parts (vacuum drying process).
- Gasket replacement and sealing improvement.
- Painting and corrosion protection.
At our fully equipped facility, we perform comprehensive testing in line with international standards such as IEC and IEEE, including:
- Advanced field testing to assess transformer health and performance.
- Professional installation services for new and refurbished transformers.
- Ensuring safe and reliable energization.
Our Strengths:
- Fully equipped workshop for heavy transformer repairs.
- Mobile service teams for on-site intervention across Nigeria and the rest of Africa.
- Quick turnaround times to reduce downtime.
- Compliance with international standards.
- Experienced engineers and certified technicians.
Our transformer services support:
- Power Generation Plants
- Transmission & Distribution
- Substations
- Industrial Facilities
- Oil & Gas Installations
- Renewable Energy Projects
At GTA ENGINEERING LIMITED, we are committed to delivering safe, efficient, and cost-effective transformer solutions that meet the highest quality standards and support an uninterrupted power supply.
Technical Details for Power Transformers (few ratings have been listed below out of the re-engineering jobs carried out in the past):
- 270MVA, 16/330kV, 3 phase, Generator Transformer
| Sr. No | Rating (MVA) | Voltage (kV) | No-Load Loss (kW) | Load Loss (kW) | %Z (Impedance) | HV Impulse (kVp) |
|---|---|---|---|---|---|---|
| 1 | 270 | 345 | 120 | 425 | 10.32 | 1050 |
- 173.6MVA, 15.5/345kV, 3 phase, Generator Transformer
| Sr. No | Rating (MVA) | Voltage (kV) | No-Load Loss (kW) | Load Loss (kW) | %Z (Impedance) | HV Impulse (kVp) |
|---|---|---|---|---|---|---|
| 1 | 173.6 | 345 | 36 | 210 | 17.10 | 1050 |
- 200MVA, 14.4/161kV, 3 phase, Generator Transformer
| Sr. No | Rating (MVA) | Voltage (kV) | No-Load Loss (kW) | Load Loss (kW) | %Z (Impedance) | HV Impulse (kVp) |
|---|---|---|---|---|---|---|
| 1 | 200 | 170 | 42 | 240 | 13.29 | 650 |
- 100MVA, 132/33kV, 3 phase, Power Transformer
| Sr. No | Rating (MVA) | Voltage (kV) | No-Load Loss (kW) | Load Loss (kW) | %Z (Impedance) | HV Impulse (kVp) |
|---|---|---|---|---|---|---|
| 1 | 100 | 145 | 48 | 410 | 12.84 | 650 |