Cenário Central térmica com 8 transformadores elevadores Características técnicas dos transformadores : Fabricante: xxx Potência [MVA]: 370 Tensão [KV]: 400 Massa de óleo [Kg]: 58.000 Tipo de óleo: óleo blendado As análises e diagnósticos de 2011 destacaram: Enxofre total = 5700 mg/Kg TCS (Total Corrosive Sulfur) = 104 mg/Kg (equivalente a DBDS) Teste CCD = corrosivo DBTP (dibenzotiofeno) = 42Leia mais

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 DBTPLeia mais

Scenario Company involved in production of primary aluminum with 8 rectifiers transformers Nameplate data of the transformers: Transformer: rectifier, ODAF with membrane Manufact: xxx Year: 1998 Power [MVA]: 93,4 Voltage [KV]: 66 Oil mass [Kg]: 27.200 Oil type: naphthenic Step 1 First failure with discharges of high energy (D2) Step 2 Post failure analysis, oil fingerprint with identification ant quantification ofLeia mais

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] 125Leia mais

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 distillazioneLeia mais

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: 0.52Leia mais

Scenario Company involved in energy transmission (36 transformers) Nameplate data of transformers: Power max [MVA]: 528 Voltage max [KV]: 400 Oil mass [Kg]: 96.900 each DBDS max [mg/Kg]: 185 DBDS target [mg/Kg]: <5 2009-2013 Solution: Selective depolarization treatments by Sea Marconi in order to remove corrosive sulfur compounds from the oils.

Scenario Brazilian energy transmission network of TSN e Novatrans with 76 electrical equipment filled with insulating fluids. Sistema di trasmissione Brasile TSN Lines 1181 km Substations 6 Total reactors 40 Reactors with corrosive sulfur 37 (92,5%) Total failed reactors 15 (37,5%) Novatrans Lines 1278 km Substations 6 Total reactors 36 Reactors with corrosive sulfur 13 (36,11%) Total failed reactors (-) 2005 Discovery of DBDS. Sea Marconi, first in theLeia mais