A Quantitative Method for Determining the Resistance of Polymers to Surface Discharges

Jolly, David C.

doi:10.1109/tei.1982.298497

Cited by 27 publications

(5 citation statements)

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“…Early work reported by Jolly [15] using a salt-fog chamber to age polymeric materials indicated that for a specified contaminant conductivity, the critical range of test voltage for effective dry-band scintillations is such that the power dissipated to heat and evaporate the flowing contaminant layer balances the flow rate of the contaminant. What is meant by "effective" dry-band scintillations are scintillations that are as close as possible to the material surface and which are thus able to thermally ablate the material.…”

Section: Effective Ac Test Voltagementioning

confidence: 99%

DC inclined-plane tracking and erosion test of insulating materials

Cherney¹,

Gorur

Krivda

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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The paper reviews previous work on the DC inclined plane test and suggests equivalent DC voltage levels in parallel to AC voltage in the ASTM inclined plane tracking and erosion test. The aim of this work is to provide a basis for standardizing the inclined plane test for DC voltage. Round robin tests done in five laboratories on five specimens of a silicone rubber material were done with the purpose of establishing appropriate ratios by which the equivalent DC voltages can be determined with respect to the corresponding AC voltages. These levels were determined as 67% and 87%, for +DC and -DC respectively, of the AC initial tracking voltage.

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Section: Effective Ac Test Voltagementioning

confidence: 99%

DC inclined-plane tracking and erosion test of insulating materials

Cherney¹,

Gorur

Krivda

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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“…The sensitivity to surface tracking can be measured by means of other approaches. For example, another systematic method based on the leakage current measurement has been proposed in [ 107 ]. This approach proposes to consider the critical AC voltage as the minimum voltage value that distorts the leakage current waveform or saturates the leakage current magnitude since these conditions indicate equilibrium between liquid contaminant replacement and evaporation [ 108 ].…”

Section: The Importance Of Cti For Polymeric Materialsmentioning

confidence: 99%

Tracking Resistance in Polymeric Insulation Materials for High-Voltage Electrical Mobility Applications Evaluated by Existing Test Methods: Identified Research Needs

Riba,

Moreno-Eguilaz,

Bogarra

2023

Polymers

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With the increasing electrification of the transportation and mobility sectors, polymer insulation materials are inevitably exposed to harsher environments, including exposure to contamination, wide temperature ranges, operation at higher voltages and switching frequencies, and low-pressure environments. This paper reviews the tests to characterize the polymeric materials used in insulation systems for electric mobility applications, focusing on resistance to tracking. This paper also reports on the limitations of existing standard test methods and identifies the challenges and research needs to meet the increasing demands of the electric mobility industry. To this end, an evaluation of the scientific and technological state of the art is carried out through the analysis of theses, research articles, technical reports, manufacturers’ datasheets, international standards, and white papers.

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“…Lower discharge initiation voltages were observed under −DC than under +DC and AC. The reduction in the discharge initiation voltage under −DC could possibly be attributed to increased evaporation of the contaminant rivulet [11], [12]. Foam was generated in the −DC IPT, which could modify the liquid contaminant characteristics, thereby changing the dischargee inception voltage [13].…”

Section: Electrowetting Studymentioning

confidence: 99%