News | Sea Marconi

With pride we publish an abstract from OFFICIAL GAZETTE of the Republic of Italy of 7 June 2007 by Ministry of the Environment and the Protection of the Territory and the Seas.This legislative document implements in Italy European Directive 96/61/EC known as “IPPC” for the enacting of the guidelines for the identification of the Bets Available Techniques allowing the competent national and regional authoritiesRead more

An Italian company, Sea Marconi, together with University of Turin have synthesized and patented a type of macromolecules, nanosponges, starting from natural oligosaccharides, cyclodextrins. These compounds can be exploited in several applications thanks to their unique and peculiar structure enabling the inclusion of several substances, that can be either strongly retained or released in a controlled way. So far, theRead more

Description of tests and PACKAGES MO SO AK ES CC Method of measure 2-FAL and furanic compounds X X X X IEC 61198 Total Acidity (TAN) X X X IEC 62021 – 1/2 Water in papers and cardboards X IEC 60814 Water in Insulating Liquids X X X X IEC 60814 Phenolic anti oxidant additives (DBPC; DBP)  New X X IECRead more

It is very important to take samples of paper from the windings of transformers at the end of their life, to improve the models of furans interpretation and to have indications on the thermal aging of similar equipment. A brief list of controls on failed/dead transformers is: Visual inspection of windings degradation Paper DP, sampling from higher side of windingsRead more

The estimation of residual life of the transformer (even in approximation) is a dream. However is possible, by adequately monitoring some parameters, to estimate the state and rate of thermal degradation of papers. This can be made with different approaches. Equivalen DP estimation: Some authors defind relationships between 2-FAL concentration (or better total 2-FAL generated) and DP of the paperRead more

A group of 4 industrial transformers (25 MVA, 15/6 kV), in a petroleum refinery. Installed on 1993, one of them has an electric failure on 2004. The fault is later identified as due to corrosive sulfur (detachment of copper sulfide particles from naked copper, LV side, discharge to earth). Meanwhile the manufacturer repairs the equipment, and refill it with theRead more

30 MVA transformer, voltage 130/15, in an hydropower plant. 13 years of service, no failure; Fluid is affected by a heavy degradation, which cannot be corrected by normal oil maintenances. DDF is hugely out of normal values, and acidity increases quickly. Oil properties Parameter 05/02/02 18/09/02 03/03/03 Moisture ppm 9,5 11 14 DDF - 0,944 1,805 1,168 Acidity mg/g 0,144Read more

17 years of monitoring on 8 industrial transformers (43,5 MVA), for a primary aluminum company. DGA values much higher than typical values defined by IEC 60599, kept under control with periodical oil treatment, and frequent OLTC repairing. With this kind of control those equipment are working at 100% loading and more since many years, without failures. The same monitoring hasRead more

The My Transfo Meeting, now at its third edition, convenes every two years the best experts in the sector of the management of fleets of electrical equipment filled with insulating liquids. My Transfo has become the European point of reference for the exchange of know-how and experiences in this field.   The last edition (18 and 19 October 2006, Turin Italy)Read more