Power transformers
35 kV / 66 kV Power Transformer with OLTC
Substation and industrial power transformers from 3.15 to 20 MVA.
- 3.15–20 MVA
- 33–66 kV
- IEC 60076
Three-phase oil-immersed power transformers for 33, 35 and 66 kV substations, mining sites and renewable grid connections. On-load tap changers keep voltage stable while loads change; ONAN/ONAF cooling and full protection come as standard.
ModelsXY-SZ11-35XY-SZ11-66
- IEC 60076
- GB 1094
Highlights
- 3.15 – 20 MVA, 33 / 35 / 66 kV
- On-load or off-circuit tap changer
- ONAN / ONAF radiators and fans
- Buchholz, WTI/OTI, pressure relief
Key parameters
| Model | XY-SZ11-35 | XY-SZ11-66 |
|---|---|---|
| Rated capacity | 3,150 – 20,000 kVA | |
| HV rated voltage | 33, 35, 66 kV | |
| LV rated voltage | 6.3, 10.5, 11, 33 kV | |
| Tap changer | On-load (OLTC) or Off-circuit (DETC) | |
| Vector group | YNd11, Dyn11 | |
| Short-circuit impedance | 6.25 – 8.0% | |
| Cooling method | ONAN / ONAF | |
| Tank / enclosure | Conservator with radiators | |
| Protection & monitoring | Buchholz relay, winding & oil temperature indicators, pressure relief, OLTC protective relay | |
| Installation | Outdoor | |
| Standards | IEC 60076, GB 1094, GB/T 6451 | |
Standard ratings
| Rated capacityMVA | HV rated voltagekV | LV rated voltagekV | Cooling method | Tap changer | Short-circuit impedance% |
|---|---|---|---|---|---|
| 3.15 | 33 / 66 | 6.3 / 11 | ONAN | OLTC / DETC | 6.25 |
| 5 | 33 / 66 | 6.3 / 11 | ONAN | OLTC / DETC | 6.25 |
| 10 | 33 / 66 | 11 / 33 | ONAN / ONAF | OLTC | 7.5 |
| 16 | 66 | 11 / 33 | ONAF | OLTC | 8.0 |
| 20 | 66 | 11 / 33 | ONAF | OLTC | 8.0 |
Indicative standard values — non-standard voltages, ratings and cooling are engineered to order.
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- Standards
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- Standards
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Inquire about this product
35 kV / 66 kV Power Transformer with OLTC
Typical reply within one working day.