Oil-immersed transformers
33 kV Oil-Immersed Distribution Transformer
Built for 11 kV and 33 kV networks in Africa, the Middle East and Asia.
- 25–2,500 kVA
- 11 / 33 kV
- IEC 60076
Three-phase oil-immersed distribution transformers from 25 to 2,500 kVA with 11, 20, 33 or 35 kV primaries and 415 V secondaries. Conservator design with Buchholz protection, ONAN cooling (ONAF from 1,500 kVA) and tropical-grade paint for pole or pad mounting.
ModelsXY-S13-33
- IEC 60076
- GB 1094
- ISO 9001
Highlights
- 25 – 2,500 kVA, 11 / 33 kV → 0.415 kV
- Conservator, Buchholz relay, pressure relief
- ONAN, ONAF from 1,500 kVA
- IEC 60076, utility specifications on request
Key parameters
| Rated capacity | 25 – 2,500 kVA |
|---|---|
| HV rated voltage | 11 kV, 20 kV, 33 kV, 35 kV |
| LV rated voltage | 0.415 kV / 0.4 kV |
| Tapping range | ±5% or ±2×2.5% |
| Vector group | Dyn11, YNd11, Yd11 |
| Cooling method | ONAN · ONAF from 1,500 kVA |
| Tank / enclosure | Conservator with radiators |
| Insulation level | LI125 AC55 (20 kV) · LI200 AC85 (35 kV) |
| Protection & monitoring | Buchholz relay, oil-level gauge, pressure relief valve, dial thermometer |
| Installation | Pole-mounted / pad-mounted / Outdoor |
| Standards | IEC 60076, GB 1094.1/2/3/5, GB/T 6451 |
Standard ratings
| Rated capacitykVA | HV rated voltagekV | LV rated voltagekV | Cooling method |
|---|---|---|---|
| 25 | 11 / 33 | 0.415 | ONAN |
| 50 | 11 / 33 | 0.415 | ONAN |
| 100 | 11 / 33 | 0.415 | ONAN |
| 200 | 11 / 33 | 0.415 | ONAN |
| 315 | 11 / 33 | 0.415 | ONAN |
| 500 | 11 / 33 | 0.415 | ONAN |
| 1,000 | 33 | 0.415 | ONAN |
| 1,500 | 33 | 0.415 | ONAN / ONAF |
| 2,500 | 33 | 0.415 | ONAF |
Indicative standard values — non-standard voltages, ratings and cooling are engineered to order.
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33 kV Oil-Immersed Distribution Transformer
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