Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper

Lingvay, Iosif; Oprina, Gabriela; Ungureanu, Livia Carmen; Pica, Alexandra; Stanoi, Valerica

Iosif Lingvay, Gabriela Oprina, Livia Carmen Ungureanu, Alexandra Pica, Valerica Stanoi

Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper

Abstract:

The behaviour of copper and insulation paper in various electrical insulating fluids (transformer oils) exposed to thermal ageing at 110±30C for 1000 hours in closed vessels (without access to atmospheric oxygen) has been studied. The processing of the comparative experimental data revealed in all cases that the concentration of dissolved oxygen in the investigated oils decreases exponentially during the heat treatment. In the presence of the copper foil, the oxygen is almost depleted (the dissolved oxygen concentration is approaching zero), indicating a higher affinity of the copper to oxygen than the affinity to oxygen of the investigated oils. In the presence of the copper foil and / or of the insulation paper, the degradation processes of the mineral oils have a pronounced character, explained by the catalytic activity of the Cu2O film that has been formed and by the paper degradation, respectively. A high thermo-oxidative stability was noticed in the case of natural triglyceride oils, particularly for the synthetic ester-based oil.

Keywords:
insulating fluids; mineral oils; vegetal oils; synthetic esters; thermo-oxidative ageing; copper; insulation paper

Issue: 2017, Volume 68, Issue 12

Pages: 2881-2885

Publication date: 2018/1/15

https://doi.org/10.37358/RC.17.12.5999

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
LINGVAY, I., OPRINA, G., UNGUREANU, L.C., PICA, A., STANOI, V., Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper, Rev. Chim., 68(12), 2017, 2881-2885.

Vancouver
Lingvay I, Oprina G, Ungureanu LC, Pica A, Stanoi V. Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper. Rev. Chim.[internet]. 2017 Dec;68(12):2881-2885. Available from: https://doi.org/10.37358/RC.17.12.5999

APA 6th edition
Lingvay, I., Oprina, G., Ungureanu, L.C., Pica, A. & Stanoi, V. (2017). Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper. Revista de Chimie, 68(12), 2881-2885. https://doi.org/10.37358/RC.17.12.5999

Harvard
Lingvay, I., Oprina, G., Ungureanu, L.C., Pica, A., Stanoi, V. (2017). 'Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper', Revista de Chimie, 68(12), pp. 2881-2885. https://doi.org/10.37358/RC.17.12.5999

IEEE
I. Lingvay, G. Oprina, L.C. Ungureanu, A. Pica, V. Stanoi, "Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper". Revista de Chimie, vol. 68, no. 12, pp. 2881-2885, 2017. [online]. https://doi.org/10.37358/RC.17.12.5999

Text
Iosif Lingvay, Gabriela Oprina, Livia Carmen Ungureanu, Alexandra Pica, Valerica Stanoi,
Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper,
Revista de Chimie,
Volume 68, Issue 12,
2017,
Pages 2881-2885,
ISSN 2668-8212,
https://doi.org/10.37358/RC.17.12.5999.
(https://revistadechimie.ro/Articles.asp?ID=5999)
Keywords: insulating fluids; mineral oils; vegetal oils; synthetic esters; thermo-oxidative ageing; copper; insulation paper

RIS
TY - JOUR
T1 - Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper
A1 - Lingvay, Iosif
A2 - Oprina, Gabriela
A3 - Ungureanu, Livia Carmen
A4 - Pica, Alexandra
A5 - Stanoi, Valerica
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2017
VL - 68
IS - 12
SP - 2881
EP - 2885
UR - https://doi.org/10.37358/RC.17.12.5999
KW - insulating fluids
KW - mineral oils
KW - vegetal oils
KW - synthetic esters
KW - thermo-oxidative ageing
KW - copper
KW - insulation paper
ER -

BibTex
@article{RevCh2017P2881,
author = {Lingvay Iosif and Oprina Gabriela and Ungureanu Livia Carmen and Pica Alexandra and Stanoi Valerica},
title = {Thermal Ageing of Some Insulating Fluids in Contact with Insulation Paper and Copper},
journal = {Revista de Chimie},
volume = {68},
number = {12},
pages = {2881-2885},
year = {2017},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.17.12.5999},
url = {https://revistadechimie.ro/Articles.asp?ID=5999}
}

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