Tag: dehydration
Spain 2020/21 Drying of transformer oil and paper
Scenario 3 single-phase transformers installed in a thermoelectric power plant in southern Spain Technical characteristics of the transformer: Manufacturer .: xxx Year: 1977 Power [MVA]: 216 Voltage [KV]: 220/22 Mass of oil [Kg]: 15,650 each. Problem Periodic analyzes of the oil showed a condition of hydration of the cellulosic insulation. The estimated water content in solid insulation is between 3Read more
Drying papers and transformer France 2008
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 pecentageRead more