S18 Oil-Immersed Power Transformer for 35 kV Networks
Oil-immersed power transformer with off-circuit tap changing, 630 to 31,500 kVA at 35 kV.
Key facts
Oil-immersed power transformer with off-circuit tap changing, 630 to 31,500 kVA at 35 kV.
- 35 kV published voltage class
- Off-circuit tap changing
- Oil-insulated construction
- 630–31,500 kVA in the published table
- Voltage class
- 35 kV
- Frequency
- 50 Hz
- Installation
- Indoor / outdoor
Published normal service conditions: −25 °C to +40 °C; altitude below 1,000 m. Specify site conditions in your enquiry.
Request datasheetTechnical parametersLead time confirmed per order.
Technical parameters
Scroll each table horizontally on smaller screens. Values below are from the factory’s published product tables; confirm the final configuration with the technical team.
| Rated capacity (kVA) | No-load loss (kW) | Load loss at 75 °C (kW) | No-load current (%) | Impedance (%) |
|---|---|---|---|---|
| 630 | 0.66 | 7.47 | 0.52 | 6.5 |
| 800 | 0.78 | 8.93 | 0.52 | 6.5 |
| 1000 | 0.92 | 10.9 | 0.52 | 6.5 |
| 1250 | 1.12 | 13.2 | 0.44 | 6.5 |
| 1600 | 1.35 | 15.8 | 0.36 | 6.5 |
| 2000 | 1.74 | 17.4 | 0.36 | 6.5 |
| 2500 | 2.05 | 18.6 | 0.36 | 6.5 |
| 3150 | 2.40 | 21.9 | 0.36 | 7.0 |
| 4000 | 2.90 | 25.9 | 0.36 | 7.0 |
| 5000 | 3.50 | 29.7 | 0.36 | 7.0 |
| 6300 | 4.20 | 33.3 | 0.36 | 8.0 |
| 8000 | 5.80 | 36.5 | 0.28 | 8.0 |
| 10000 | 7.00 | 43.0 | 0.28 | 8.0 |
| 12500 | 8.00 | 51.1 | 0.24 | 8.0 |
| 16000 | 9.70 | 62.5 | 0.24 | 8.0 |
| 20000 | 11.5 | 75.5 | 0.24 | 8.0 |
| 25000 | 13.6 | 89.3 | 0.20 | 10.0 |
| 31500 | 16.2 | 106.4 | 0.20 | 10.0 |
| Rated capacity (kVA) | High voltage (kV) | HV tapping range (source notation) | Low voltage (kV) | Connection group |
|---|---|---|---|---|
| 630 | 35 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 800 | 35 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 1000 | 35 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 1250 | 35 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 1600 | 35 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 2000 | 35 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 2500 | 35 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 3150 | 35 / 38.5 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 4000 | 35 / 38.5 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 5000 | 35 / 38.5 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 6300 | 35 / 38.5 | ±5 / ±2×2.5 | 3.15 / 6.3 / 10.5 | Yd11 |
| 8000 | 35 / 38.5 | ±2×2.5 | 3.15 / 3.3 / 6.3 / 6.6 / 10.5 | YNd11 |
| 10000 | 35 / 38.5 | ±2×2.5 | 3.15 / 3.3 / 6.3 / 6.6 / 10.5 | YNd11 |
| 12500 | 35 / 38.5 | ±2×2.5 | 3.15 / 3.3 / 6.3 / 6.6 / 10.5 | YNd11 |
| 16000 | 35 / 38.5 | ±2×2.5 | 3.15 / 3.3 / 6.3 / 6.6 / 10.5 | YNd11 |
| 20000 | 35 / 38.5 | ±2×2.5 | 3.15 / 3.3 / 6.3 / 6.6 / 10.5 | YNd11 |
| 25000 | 35 / 38.5 | ±2×2.5 | 3.15 / 3.3 / 6.3 / 6.6 / 10.5 | YNd11 |
| 31500 | 35 / 38.5 | ±2×2.5 | 3.15 / 3.3 / 6.3 / 6.6 / 10.5 | YNd11 |
Slash-separated entries are alternatives. Tapping notation is retained from the source; where a percent sign or value is absent, request confirmation before selection.
Voltage combinations, tapping range and connection group must be confirmed for the selected rating.
Small ratings use a fully sealed corrugated tank. From 5,000 kVA the tank is a bell-type or conventional design with plate radiators, and cooling fans can be added on request.