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Cedric Lesaint

Research Scientist

Cedric Lesaint

Research Scientist

Cedric Lesaint
Phone: 936 81 716
Department: Electric Power Technology
Office: Trondheim

Publications and responsibilities

Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1526050

For transformers in service, aging markers from cellulose in oil such as furans, water, methanol and acids are measured for diagnostic purposes. The content of these indicators, measured in oil, may therefore vary with load, temperature, solid and liquid insulation aging, as well as marker stability...

Authors Liland Knut Brede Linhjell Dag Lesaint Cedric Michel Ese Marit-Helen Glomm Lundgaard Lars Esben Mavrommatis Pascal Stjepanovic Nenad Miroljub
Year 2017
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1385622

To facilitate operation of power electronics for subsea operation at ambient pressure components have to be submerged in a liquid. Equipment and schemes for testing of long term properties have been developed. Several techniques were used to investigate compatibility between a silicone gel and vario...

Year 2016
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1385596

We describe herein the design of a small AC electrostatic model coalescer for investigating coalescence efficiency of water in oil emulsions. The function of the model coalescer is tested on emulsions with different water cuts. In the coalescer, coalescence takes place in a couette flow in the bulk ...

Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1258142

A self-healing electrical insulation material for high voltage apparatuses has yet not been developed. Such a material would have been very attractive for electrical components installed in conditions were service failures cause time consuming and very expensive replacements. This paper reports resu...

Year 2016
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1060702

This report addresses state of the art in the field of transformer ageing and diagnostics, with emphasis on advising end-users on transformer asset management and on transformer specification. The basis is results from two projects on laboratory studies on ageing of mineral oil impregnated cellulose...

Authors Lundgaard Lars Esben Liland Knut Brede Linhjell Dag Susa Dejan Ese Marit-Helen Selsbak Cecilie Mørk Kes M Lesaint Cedric Michel
Year 2015
Type Report/thesis
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1162815

Water is an important enemy of an electric insulation system. Water vapour can be absorbed by electrical insulation materials (liquids or solid) and migrate in between the materials to achieve the same relative humidity equilibrium everywhere. Water can reduce withstand voltage of the insulation liq...

Authors Lesaint Cedric Michel Babault Celine Liland Knut Brede Lundgaard Lars Esben
Year 2014
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1142937

Electrical treeing can be the precursor to catastrophic failure for electrical insulation materials and hence significantly shorten their service lifetime. Considering that damage inside the composites (thermoset insulation materials containing fillers) is difficult to detect and particularly to rep...

Year 2014
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1133456

The interaction between low molecular weight acids dissolved in mineral oil with cellulose has been studied. The formation of esters as a function of temperature has been demonstrated using attenuated total reflection infrared (IR) spectroscopy. Higher temperatures lead to a shift towards ester form...

Authors Ese Marit-Helen Liland Knut Brede Lesaint Cedric Michel Kelesoglu Murside Kes
Year 2014
Type Journal publication