Scenario
Hydro power plant
Nameplate data of transformer:
Transformer: power transformer
Year: 1948
Power [MVA]: 33
Voltage [KV]: 225
Oil mass [Kg]: 74.000
Solution Sea Marconi
Solution: Dehydration treatment performed on-load (transformer fully load during the treatment)
Before the treatment |
After the treatment |
After 6 months |
|
| Oil temp. [°C] | 15 | 63 | 35 |
| Dissolved water [mg/Kg] IEC 60814 | 28 | 8 | 14 |
| Saturation pecentage | 62% | 3% | 13,94% |
| Water inside the paper using the equilibrium curve | > 10% | (*) | 3,9% |
| Insulating condition IEC 60422 | Extremely wet | (*) | Moderately wet |
| Breakdown voltagea [KV] IEC 60156 | 39,8 | > 75 | > 75 |
