Inception of Electrical Tree from Water-Tree Degradation

Suzuoki, Yasuo; Saito, Tetsuro; Komori, F.; Uchida, Kôji

doi:10.1109/icpadm.2006.284130

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…We have been studying electrical-tree inception and propagation and associated phenomena mainly by using a water-needle electrode [1][2][3][4][5]. One of our previous results is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 95%

“…The samples with dried water tree were formed as described in our previous report [4]. of polymer chains and micro void formation, enhance degradation during the AC prestressing, leading to lower impulse tree inception voltages.…”

Section: -mentioning

confidence: 99%

“…The AC electrical-tree inception voltage becomes higher with the water-tree area and this is explained in terms of electrical-field moderation [e.g. [4][5][6]. Abstract: In order to clarify the mechanism of electrical-tree inception which often determines the remaining life of power cables, we have been investigating electrical tree inception and propagation from water-tree degradation in polyethylene.…”

mentioning

confidence: 99%

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Inception of electrical tree from water-tree degradation at high temperature

Suzuoki

Hayashi

Kato

et al. 2009

2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials

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Section: Introductionmentioning

confidence: 95%

Section: -mentioning

confidence: 99%

mentioning

confidence: 99%

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Inception of electrical tree from water-tree degradation at high temperature

Suzuoki

Hayashi

Kato

et al. 2009

2009 IEEE 9th International Conference on the Properties and Applications of Dielectric Materials

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“…ELECTRICAL treeing is a pre-breakdown degradation mechanism that is initiated by local high stress points such as metallic asperities, discharging voids [1], and water trees [1,2]. It leads ultimately to electrical breakdown [1], once the tree has crossed the insulation.…”

Section: Introductionmentioning

confidence: 99%

The role of bulk charge transport processes in electrical tree formation and breakdown mechanisms in epoxy resins

Chalashkanov

Dodd

Dissado

et al. 2016

IEEE Trans. Dielect. Electr. Insul.

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Electrical treeing experiments have been conducted at different temperatures and levels of absorbed moisture in Araldite CY1311 epoxy resin samples above their glass transition temperature, i.e. when the resin was in a flexible state. The fractal dimension of the electrical trees obtained and the rate of tree growth were found to depend on the environmental factors: temperature and humidity. It has also been found that at certain levels of temperature and moisture absorbed in the samples, a transition occurs from electrical treeing degradation to breakdown by thermal runaway. Complementary investigations of the dielectric properties of the same epoxy resin system have revealed that a bulk quasi-dc (QDC) charge transport mechanism takes place above the glass transition temperature, and we show that the characteristic features of the dielectric response are related to the shape of the electrical treeing degradation and the transition to thermal breakdown. This is explained qualitatively through the effect of the bulk QDC charge transport process in modifying the local space charge electric field distribution.

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