2019
DOI: 10.1007/s10570-019-02246-x
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Damage assessment of transformer Kraft paper insulation aged in mineral and vegetable oils

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Cited by 13 publications
(4 citation statements)
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“…4c). The behavior is consistent with the literature [8] and indicates for DP < 300 (aging time > 400 h) the break strain is < 1 % and at this point the paper would be considered to be at the end of life [4]. Thus it is possible here to prepare samples for flow testing covering the full range of available mechanical properties.…”
Section: Effect Of Aging On Mechanical Propertiessupporting
confidence: 85%
“…4c). The behavior is consistent with the literature [8] and indicates for DP < 300 (aging time > 400 h) the break strain is < 1 % and at this point the paper would be considered to be at the end of life [4]. Thus it is possible here to prepare samples for flow testing covering the full range of available mechanical properties.…”
Section: Effect Of Aging On Mechanical Propertiessupporting
confidence: 85%
“…The limit of the temperature rise at the top of the oil in power transformers was set at 60 • C [25]. Therefore, an increase above this rise would elevate the aging rate as it happens with pure dielectric oils [14,15].…”
Section: Methodology Of Thermal Agingmentioning
confidence: 99%
“…For this reason, some authors have focused their works on these characteristics [10][11][12][13]. Their results conclude that magnetic fluids reduce temperatures at transformer winding and top oil, which would diminish the aging rate as it happens with pure dielectric liquids [14,15].…”
Section: Introductionmentioning
confidence: 99%
“…The papers were cut into 7 cm square pieces for dielectric analysis and into strips of 26 cm x 1.5 cm for tensile test. Due to paper anisotropy [9]- [11], the strips were cut with two different fiber direction angles (longitudinal and transverse) to measure mechanical properties (tensile strength, strain, energy per unit volumen...).…”
Section: A Samplesmentioning
confidence: 99%