Tag: azufre corrosivo

Scenario Uruguayan utility October 2012: Failure 2 weeks after a reclaim treatment with fuller earth (performed by a local operator). Nameplate data of the transformer: Transformer: grid transformer with OLTC Namufact.: xxx Year: 1977 Power [MVA]: 425 Voltage [KV]: 500 Oil mass [Kg]: 58.000 Oil type: YPF65 paraffinic oil not inhibited Segni di arco elettrico sui contatti del selettore Analysis and diagnosis (by the holder)Lee mas

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 Trasformatore affetto da PCB e presenza di composti corrosivi solforati 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 wasLee mas

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 performedLee mas

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 Fingerprint dell’olio. Si evidenzia la presenza di composti solforati responsabili della corrosività dell’olio 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 oilsLee mas

Escenario El tratamiento clásico con tierra Fuller resulta totalmente ineficaz contra el azufre corrosivo. Características técnicas del transformador: Fabricante: xxx Año: 1969 Potencia [MVA]: **14** Tensión [KV]: **63** Masa de aceite [Kg]: **4.200** Tipo de aceite: Esso Univol 54 Fingerprint dell’olio. Presenza di composti solforati NON DBDS El tratamiento con tierras Fuller (NO de Sea Marconi) no ha producido ningúnLee mas

Escenario Central térmica con 8 transformadores elevadores Características técnicas de los transformadores : Fabricante: xxx Potencia [MVA]: 370 Tensión [KV]: 400 Masa de aceite [Kg]: 58.000 Tipo de aceite: aceite blendado Los análisis y diagnósticos de 2011 mostraron: Azufre total = 5700 mg/Kg TCS (Total Corrosive Sulfur) = 104 mg/Kg (equivalente a DBDS) Prueba CCD = corrosivo DBTP (dibenzotiofeno) =Lee mas

Scenario Thermal power plant with 8 GSU transformers Nameplate data of the transformers: Power [MVA]: 175 Voltage [KV]: 400 Oil type: naphthenic oil C2 – Corrosione NON legata a 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 DBTPLee mas

Scenario Company in the chemical business, 4 GSU transformer Nameplate data of the transformer: Manufatc: xxx Year: 2000 Power [MVA]: 47 Voltage [KV]: 34 Oil mass [Kg]: 12.000 Oil type: naftenico Solution Solution: Selective depolarization treatment (Chedcos) performed on-ste and on-load (transformer in service e fully load during the treatment). The treatment has guaranteed DBDS < 10 mg/kg. Before treatment After treatment DBDS [mg/Kg] 125Lee mas

Scenario Primary substation with 3 Grid transformer and 2 shunt reactors Nameplate data of the transformer: Manufact: xxx Year: 1998 Power [MVA]: 250 Voltage [KV]: 345 Oil mass [Kg]: 118.000 Oil type: naphthenic Analitical and diagnostic results The analysis and subsequent diagnosis performed by Sea Marconi on the machines of the customer showed a clear presence of DBDS Profilo di distillazioneLee mas

Scenario 4 GSU transformer at thermal power plant Nameplate data of the transformers: Manufact: xxx Year: 1997 Power [MVA]: 192 Voltage [KV]: 400 Oil mass [Kg]: 58.000 Oil type: naphthenic May 2005 The analysis and subsequent diagnosis performed by Sea Marconi on the equipment of the customer showed: Index of corrosiveness =1 (max level) ASTM b 48H= 4C Overall Health index: 0.52Lee mas