Tag: transformer

  On May 27, 2025, the CEI – Italian Electrotechnical Committee hosted in Milan a technical seminar titled: “Dielectric liquids for transformers: from mineral oil, through PCB, to esters”. Sea Marconi took part as a sponsor and speaker, offering a perspective that bridges the past and future of asset and risk management for transformers. The first presentation, by Vander Tumiatti,

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The EURODoble 2024 is about to kick off, and Sea Marconi will be among its key players. Riccardo Maina, our head of the chemical laboratory and secretary of the IEC TC10, is one of the speakers at this prestigious conference with a speech titled “Retrofilling Transformers with Natural Esters: The Importance of Fluid-Atmosphere Segregation.” EURODoble 2024, celebrating its 30th anniversary,

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Electric transformers are key components in any electrical distribution system, used to convert voltage from one level to another (from production to usage). MT/BT distribution transformers are essentially of two types: oil-filled and dry-type. Oil-filled transformers consist of a metal casing containing mineral oil, which serves the function of electrical insulation and heat dissipation, while dry-type transformers can be air-cooledRead more

Sea Marconi is one of the world’s leading experts on corrosion phenomena, having discovered DBDS in 2005 as the main cause of failures related to corrosive sulfur (C1). In the last 2 years Sea Marconi has assisted, and has been directly involved, on several cases of failure related to corrosion phenomena on the silver contacts of the selectors, with very

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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)

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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)

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A month has passed since My Transfo 2014 (Turin, 18 and 19 November 2014), the leading conference in Europe on insulating oil used in electrical apparatus. My Transfo has been held every two years since 2002, and each time, in particular prior to the last two editions, there has been doubt as to whether the famous international crisis would haveRead more

Chile depolarisation. One of the most “extreme” missions performed by Sea Marconi has been concluded successfully: the treatment of 6 transformers in the desert of Atacama in Chile, the driest place in the world, at 9,000 feet altitude with a temperature range between day and night of more than 30 °C. Our operational engineers were able to adapt to really difficult conditions suchRead more

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 ofRead more

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] 125Read more