SZ20 Oil-Immersed Transformer for 35 kV Networks
Oil-immersed transformer with on-load tap changing.
Key facts
Oil-immersed transformer with on-load tap changing.
- 35 kV published voltage classes
- On-load tap changing
- Oil-insulated construction
- 3,150–31,500 kVA across the published tables
- 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 product document; 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 (%) |
|---|---|---|---|---|
| 3150 | 2.1 | 22.2 | 0.40 | 7.0 |
| 4000 | 2.5 | 26.2 | 0.40 | 7.0 |
| 5000 | 3.0 | 30.8 | 0.40 | 7.0 |
| 6300 | 3.7 | 33.0 | 0.40 | 8.0 |
| 8000 | 5.1 | 36.5 | 0.32 | 8.0 |
| 10000 | 6.0 | 43.2 | 0.32 | 8.0 |
| 12500 | 7.1 | 51.1 | 0.28 | 8.0 |
| 16000 | 8.5 | 63.3 | 0.28 | 8.0 |
| 20000 | 10.1 | 74.4 | 0.28 | 8.0 |
| 25000 | 11.9 | 88.0 | 0.24 | 10.0 |
| 31500 | 14.2 | 104.4 | 0.24 | 10.0 |
| Rated capacity (kVA) | High voltage (kV) | HV tapping range (source notation) | Low voltage (kV) | Connection group |
|---|---|---|---|---|
| 3150 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 10.5 | Yd11 |
| 4000 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 10.5 | Yd11 |
| 5000 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 10.5 | Yd11 |
| 6300 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 10.5 | Yd11 |
| 8000 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 6.6 / 10.5 | YNd11 |
| 10000 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 6.6 / 10.5 | YNd11 |
| 12500 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 6.6 / 10.5 | YNd11 |
| 16000 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 6.6 / 10.5 | YNd11 |
| 20000 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 6.6 / 10.5 | YNd11 |
| 25000 | 35 / 38.5 | Not stated; request confirmation | 6.3 / 6.6 / 10.5 | YNd11 |
| 31500 | 35 / 38.5 | Not stated; request confirmation | 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.
For oil-immersed ratings up to 500 kVA with paired load-loss figures, the first value applies to Dyn11 and the second to Yyn0. Voltage combinations, tapping range and connection group must be confirmed for the selected rating.