@conference{10902/18366,
year = {2019},
url = {http://hdl.handle.net/10902/18366},
abstract = {Oil-immersed transformers, whose lifespan is defined by cellulose insulation's lifetime, utilize frequently mineral oil. However, this insulating fluid is being replaced by alternative liquids such as natural and synthetic esters. This replacement requires to guarantee a similar behavior of solid insulating materials immersed in them. Although there are different authors who have concluded that Kraft paper reduces its deterioration rate when it is immersed in biodegradable fluids, there are few works that have analyzed the effect of insulation liquids on the mechanical properties of other cellulosic materials such as diamond dotted paper (DDP) during laboratory tests. This paper shows a comparative analysis of four paper/oil specimens (a standard Kraft paper and a diamond dotted paper aged in both mineral oil and natural ester) under controlled laboratory accelerated thermal ageing. This work focuses on changes in mechanical properties such as the energy consumed per unit volume of the failure zone (E R ), rupture strength (σ R ) and strain under ultimate strength (ε cm ).},
organization = {This project has received funding from the European Union’s Horizon 2020 research and
innovation programme under the Marie Sklodowska-Curie grant agreement No 823969-BIOTRAFO},
publisher = {Institute of Electrical and Electronics Engineers Inc.},
publisher = {IEEE International Conference on Dielectric Liquids (ICDL), Roma, 2019, 233-236},
title = {Kraft and diamond dotted paper thermally aged in mineral oil and natural ester: mechanical characterisation},
author = {Fernández Diego, Cristina and Ortiz Fernández, Alfredo and Carrascal Vaquero, Isidro Alfonso and Fernández Diego, Inmaculada and Delgado San Román, Fernando and Olmo Salas, Cristian},
}