Tag: trasformatore

Os transformadores elétricos são componentes-chave em qualquer sistema de distribuição elétrica, responsáveis por converter a tensão de um nível para outro (da produção para o uso). Os transformadores para distribuição MT/BT são essencialmente de dois tipos: de óleo e a seco. Os transformadores de óleo são constituídos por um invólucro metálico que contém óleo mineral, o qual desempenha a funçãoLeia mais

The EuroDoble is one of the main appointments for the technical updating of the sector in Europe. This year the event was held in Rome from 25 to 28 October 2022 on two main topics: Asset Management and Digital Substations. At the invitation of Doble Sea Marconi had the honor of opening the technical part of the event (keynote speech)

Leia mais

The very first draft of the event agenda is available, from which it is possible to have an idea of the topics that will be discussed at the next My Transfo 2018: Solid and liquid insulating materials for high temperature, applications and case histories >> Richard Marek – Dupont (USA) Characterization of different cellulose types using dielectric frequency response (FDS) >> Britta

Leia 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