Tag: C2

Scenario Hydro Power Plant The transformer is located near a river dam with extreme logistical and environmental constraints. The option of changing the oil was discarded immediately because of the enormous difficulties in handling (see. Photo) around the transformer. At the same time the fuller earth techniques would not solve the functional criticalities of the system “oil – transformer”. NameplateRead more

Scenario Nameplate data of transformer: Transformer: grid transformer Manufact: xxx Year: 1957 Power [MVA]: 50 Voltage [KV]: 225 Oil Mass [Kg]: 38.000 Oil type: blended mineral oil Transformer contaminated by PCBs and corrosive sulfur compounds Solution Selective depolarization treatment (Chedcos) in order to remove corrosive sulfur compounds and dehalogenation treatment (CDP Process®) in order to remove the PCBs from oil and transformer. The treatment was performerd on-siteRead more

Scenario Hydro power plant with 3 GSU transformers Nameplate data of the transformer: Manufact: xxx Year: 1965 Power [MVA]: 80 Voltage [KV]: 220 Oil mass [Kg]: 35.000 Oil type: naphthenic blended Solution Selective deplarization treatment (Chedcos) in order to remove the corrosive sulfur compounds and dehalogenation treatments (CDP Process®) in order to remove the PCBs from the oil and the transformers. the tratments were performedRead more

Scenario Steel Factory: 8 Equipment Nameplate data of the transformers: Namufact: xxx Year: 1973 Power [MVA]: 85 Voltage [KV]: 63 Oil mass [Kg]: 18.150 Oil type: naphthenic blended Oil Fingerprint. It shows the presence of sulfur compounds responsible for oil corrosivity Solution Selective depolarization treatment (Chedcos) in order to remove the corrosive sulfur compounds and dehalogenation treatments (CDP Process®) in order to remove the PCBs from the oilsRead more

Scenario Il classico trattamento con terre follari si dimostra totalmente inefficace contro lo zolfo corrosivo Caratteristiche tecniche del trasformatore: Costruttore: xxx Anno: 1969 Potenza [MVA]: 14 Tensione [KV]: 63 Massa olio [Kg]: 4.200 Tipo di olio: Esso Univol 54 Oil Fingerprint. Presence of sulfur compounds without DBDS Il trattamento con terre follari (NON da Sea Marconi) non ha prodotto alcun risultatoRead more

Scenario Thermal power plant with 8 GSU transformers Nameplate data of the transformer: Manufacturer: xxx Power [MVA]: 370 Voltage [KV]: 400 Oil mass [Kg]: 58.000 Oil type: blended oil The analysis and diagnosis of the 2011 showed: Total sulfur = 5700 mg/Kg TCS (Total Corrosive Sulfur) = 104 mg/Kg (DBDS eq.) CCD Test = corrosive DBTP (dibenzothiophene) = 42 mg/Kg Step 2Read more

Scenario Thermal power plant with 8 GSU transformers Nameplate data of the transformers: Power [MVA]: 175 Voltage [KV]: 400 Oil type: naphthenic oil C2 – Corrosion not caused by DBDS Step 1 The diagnosis in the 2009 showed: Total sulfur = 200 mg/Kg TCS (Total Corrosive Sulfur) = 157 mg/Kg (DBDS eq.) CCD Test = corrosive IFT = 19 mN/m DBTPRead more