Deposition of conductive copper sulfide on paper insulation of power transformers was recognized as a serious risk that can result in equipment failure. The aim of this study was to investigate the influence of mineral insulating oil oxidation and the presence of metal passivator on copper sulfide (Cu2S) deposition. Oil oxidation was found to increase deposition of Cu2S on the insulating paper, as confirmed by IEC 61125 B and IEC 62535 tests. The presence of oxygen resulted in an increase of copper dissolution in the oil and facilitated progressive copper sulfide deposition on the insulating paper, as confirmed by ICP, AAS, and EDX measurements. The effectiveness of aminomethyl substituted toluylbenzotriazole (TEA) metal passivator in suppressing copper sulfide formation and deposition was studied using modified IEC 62535 test. The protective role of TTA bonded to the copper plate surface and absorbed in the insulating paper was observed in tests at 140 and 150 degrees C, even for high...ly oxidized oils.
TY - JOUR
AU - Lukić, Jelena M.
AU - Milosavljević, Srdjan B.
AU - Orlović, Aleksandar
PY - 2010
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1658
AB - Deposition of conductive copper sulfide on paper insulation of power transformers was recognized as a serious risk that can result in equipment failure. The aim of this study was to investigate the influence of mineral insulating oil oxidation and the presence of metal passivator on copper sulfide (Cu2S) deposition. Oil oxidation was found to increase deposition of Cu2S on the insulating paper, as confirmed by IEC 61125 B and IEC 62535 tests. The presence of oxygen resulted in an increase of copper dissolution in the oil and facilitated progressive copper sulfide deposition on the insulating paper, as confirmed by ICP, AAS, and EDX measurements. The effectiveness of aminomethyl substituted toluylbenzotriazole (TEA) metal passivator in suppressing copper sulfide formation and deposition was studied using modified IEC 62535 test. The protective role of TTA bonded to the copper plate surface and absorbed in the insulating paper was observed in tests at 140 and 150 degrees C, even for highly oxidized oils.
PB - Amer Chemical Soc, Washington
T2 - Industrial & Engineering Chemistry Research
T1 - Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator
EP - 9608
IS - 20
SP - 9600
VL - 49
DO - 10.1021/ie1013458
ER -
@article{
author = "Lukić, Jelena M. and Milosavljević, Srdjan B. and Orlović, Aleksandar",
year = "2010",
abstract = "Deposition of conductive copper sulfide on paper insulation of power transformers was recognized as a serious risk that can result in equipment failure. The aim of this study was to investigate the influence of mineral insulating oil oxidation and the presence of metal passivator on copper sulfide (Cu2S) deposition. Oil oxidation was found to increase deposition of Cu2S on the insulating paper, as confirmed by IEC 61125 B and IEC 62535 tests. The presence of oxygen resulted in an increase of copper dissolution in the oil and facilitated progressive copper sulfide deposition on the insulating paper, as confirmed by ICP, AAS, and EDX measurements. The effectiveness of aminomethyl substituted toluylbenzotriazole (TEA) metal passivator in suppressing copper sulfide formation and deposition was studied using modified IEC 62535 test. The protective role of TTA bonded to the copper plate surface and absorbed in the insulating paper was observed in tests at 140 and 150 degrees C, even for highly oxidized oils.",
publisher = "Amer Chemical Soc, Washington",
journal = "Industrial & Engineering Chemistry Research",
title = "Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator",
pages = "9608-9600",
number = "20",
volume = "49",
doi = "10.1021/ie1013458"
}
Lukić, J. M., Milosavljević, S. B.,& Orlović, A.. (2010). Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator. in Industrial & Engineering Chemistry Research
Amer Chemical Soc, Washington., 49(20), 9600-9608.
https://doi.org/10.1021/ie1013458
Lukić JM, Milosavljević SB, Orlović A. Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator. in Industrial & Engineering Chemistry Research. 2010;49(20):9600-9608.
doi:10.1021/ie1013458 .
Lukić, Jelena M., Milosavljević, Srdjan B., Orlović, Aleksandar, "Degradation of the Insulating System of Power Transformers by Copper Sulfide Deposition: Influence of Oil Oxidation and Presence of Metal Passivator" in Industrial & Engineering Chemistry Research, 49, no. 20 (2010):9600-9608,
https://doi.org/10.1021/ie1013458 . .
