2500 kVA Oil Immersed Power Transformer: Custom Design & Standards
Jan 23, 2026
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For large-capacity substations and demanding power distribution projects, selecting a reliable transformer supplier is critical.
A 2500 kVA oil-immersed power transformer is engineered for high-load, continuous operation and must fully comply with international standards.
- Typical specifications include rated capacity 2500 kVA, customized voltage ratings (e.g. 33/11 kV, 35/10 kV, 11/0.4 kV), ONAN or ONAF cooling, mineral or eco-friendly insulating oil, and 50/60 Hz frequency.
- Custom design options include voltage ratio and tapping range, cooling system optimization, high-ambient-temperature or high-altitude design, noise-level control for urban substations, and special protection and monitoring devices.
- Applicable standards include IEC 60076, ANSI/IEEE standards, GB and equivalent national standards, plus project-specific technical specifications.
- Each unit undergoes routine tests, type tests and optional special tests before delivery.
2500 kVA oil immersed power transformer assembled
Typical Technical Specifications
A 2500 kVA oil-immersed power transformer is designed for heavy-duty substation applications with stable performance under high load. Typical specifications include:
| Parameter | Typical value / options |
|---|---|
| Rated capacity | 2500 kVA |
| Rated voltage | Customized (e.g. 33/11 kV, 35/10 kV, 11/0.4 kV) |
| Cooling method | ONAN / ONAF |
| Insulating oil | Mineral oil or eco-friendly insulating oil |
| Frequency | 50 Hz / 60 Hz |
| Vector group | Dyn11, Yyn0 or project-specific |
Transformer testing process and nameplate inspection
Custom Design Dimensions
Custom design is a key advantage of sourcing from a manufacturer-level supplier. Available customization options include:
- Voltage ratio and tapping range
- Cooling system optimization (ONAN / ONAF)
- High-ambient-temperature or high-altitude design (derating per IEC 60076)
- Noise-level control for urban substations (measurement per IEC 60076-10)
Special protection and monitoring devices (Buchholz relay, pressure relief, temperature and level indicators)
Standards and Compliance of 2500 kVA Oil Immersed Power Transformer
All 2500 kVA Oil Immersed Power Transformers from GNEE are manufactured in strict accordance with international and regional standards.
Applicable Standards
All 2500 kVA oil-immersed power transformers should be manufactured in strict accordance with international and regional standards:
- IEC 60076 (parts 1–5, 10, 14 as applicable)
- ANSI / IEEE standards (e.g. IEEE C57.12 series)
- GB and equivalent national standards
- Project-specific technical specifications
Finished transformer packed and ready for export shipment
Testing Before Delivery
Each unit should undergo routine tests, type tests and optional special tests to ensure safety and compliance:
- Routine tests: winding resistance, turns ratio, no-load loss and current, load loss and impedance, dielectric tests, insulation resistance, oil tests
- Type tests: temperature rise, lightning impulse, short-circuit withstand (on representative units)
- Special tests: partial discharge, sound level, harmonics where required
Complete documentation, test reports and certificates should accompany the unit to support inspection, installation and commissioning.
Why Choose GNEE for 2500 kVA Oil Immersed Power Transformer
Global customers choose GNEE for large-capacity transformers because we offer more than just equipment.
Key advantages:
- Proven experience in high-capacity transformer projects
- Stable quality and long service life
- Competitive factory-direct pricing
- Technical support from design to commissioning
- Reliable delivery and export packaging
We focus on long-term cooperation rather than one-time supply.
Conclusion – 2500 kVA Oil Immersed Power Transformer from GNEE
The 2500 kVA Oil Immersed Power Transformer: Custom Design & Standards solution from GNEE is built to support high-load substations with reliability, flexibility, and full standards compliance.
If you are planning a project requiring a 2500 kVA Oil Immersed Power Transformer, contact GNEE today for professional design support, technical consultation, and a fast factory-direct quotation.
📩 Send your inquiry now and work directly with a trusted transformer manufacturer.