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pro vyhledávání: '"Marius Grisaru"'
Autor:
Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 8
Issue 1
Volume 8
Issue 1
DGA plays a vital role in the diagnostics and maintenance of the transformers. It is a multidisciplinary and complex field that is not easy to master. That is the reason why this article is oriented to explaining the learning and understanding the pr
Autor:
Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 7
Issue 3
Volume 7
Issue 3
Sulphur corrosion damages the copper of a power transformer, and it is commonly associated with mineral oil. Although the problem is quite old as it was noticed shortly after the implementation of the mineral oil for the transformers a hundred years
Autor:
Sruti Chakraborty, Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 7
Issue 5
Volume 7
Issue 5
A digital transformer is the centrepiece of a smart grid that gives agility to the business model of the power sector. It enables self-measurement, monitoring, analysis, and two-way communication of its condition using various electronic devices in r
Autor:
Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 7
Issue 4
Volume 7
Issue 4
DGA plays a vital role in the diagnostics and maintenance of the transformers. It is a multidisciplinary and complex field that is not easy to master. That is the reason why this article is oriented to explaining the learning and understanding the pr
Autor:
Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 7
Issue 1
Volume 7
Issue 1
With time, the size of the transformer increased exponentially both in power andvoltage. Although huge improvements have been made regarding the magnetic core and the decrease of core losses, a transformer is now producing much more heat due to the d
Publikováno v:
IEEE Electrical Insulation Magazine. 33:31-38
It is a general belief that mineral oil filled power transformers are designed to operate reliably for up to 40 years. However, there are many transformers installed worldwide operating well beyond such age. Therefore, transformer end-of-life should
Autor:
Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 6
Issue 3
Volume 6
Issue 3
Electricity powers the world and is an indispensable product for humanity, almost like water and food. This energy category needs two types of materials which make it feasible - electrical conductors and electrical insulators. In practice, no one can
Autor:
Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 6
Issue 5
Volume 6
Issue 5
Today the classical bathtub curve model is the main model for life expectancy calculation of all the electrical equipment and, especially, all kind of oil-filled transformers. Most of the stakeholders and maintenance engineers make their decisions on
Autor:
Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 6
Issue 4
Volume 6
Issue 4
Future brings some changes to DGA. It is expected that offline DGA in standard laboratories will gradually disappear as a routine test and transformers without online DGA will be tested by using simple portable devices. The online sensors will be mon
Autor:
Marius Grisaru
Publikováno v:
Transformers Magazine
Volume 5
Issue 4
Volume 5
Issue 4
Hydrogen gas has been the most measured transformer parameter in the last 30 years. At least 95 % of all online monitors used for continuous monitoring of transformers measure hydrogen. The majority of online monitoring performed on transformers meas