Effect of Wetting Conditions on The Contamination Flashover Voltages of Polymer Insulators

Gautam, Basanta Kumar; Mizuno, Yukio; Matsubayashi, Gen‐etsu; Sakanishi, Kenji; Kawaguchi, Toshiyuki; Matsuoka, Ryosuke

doi:10.1109/icpadm.2006.284234

Cited by 10 publications

(2 citation statements)

References 2 publications

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“…For hydrophobic materials such as HDPE, the accumulation of water droplets on the surface can result in their movement under the action of an applied electrical field. This movement of water droplets along the spacer surface eliminates the high-field regions that would otherwise be created by the accumulation of droplets at the triple junction, increasing the flashover initiation voltage and, thus, the breakdown voltage [27], [28], [29]. This is particularly evident for negative polarity, where the discharge is more likely to propagate over the surface of materials at higher levels of RH [3], [13].…”

Section: B Humiditymentioning

confidence: 99%

Impulsive Flashover Characteristics and Weibull Statistical Analysis of Gas-Solid Interfaces With Varying Relative Humidity

et al. 2020

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This paper informs on the flashover strength of three materials: Delrin (polyoxymethylene), HDPE (high-density polyethylene) and Ultem (polyetherimide) with smooth surface finishes, in zero-grade air at −0.5, 0 and 0.5 bar gauge, and at <10%, ~50% and >90% relative humidity (RH). Both negative and positive polarity impulse voltages were applied to investigate the potentially asymmetrical electrical performance of the geometrically-symmetrical electrode arrangement. In all tests, high voltage (HV) impulses with a nominal 100/700 ns wave-shape were applied. Each test conformed with the ASTM D3426-97 standard of 'step up' testing, to find the average flashover voltage for each set of conditions. For negative polarity, each solid dielectric material demonstrated a decrease in flashover voltage as the RH was increased. For positive polarity, however, the flashover voltages were similar for all levels of RH, with the exemption of HDPE. A decrease in flashover voltage was found as the permittivity of the material increased for negative polarity, irrespective of humidity and pressure. Overall, the highest flashover voltage recorded for negative polarity was ~200 kV with an HDPE spacer, at 0.5 bar gauge and <10% RH. The poorest performance was for a Delrin spacer in negative polarity, at −0.5 bar gauge and >90% RH, at a value of ~53 kV. For positive polarity, the highest flashover voltage was for a Delrin spacer at ~50% RH and 0.5 bar gauge, with a voltage of ~180 kV; the lowest flashover voltage of ~60 kV was recorded with an HDPE spacer, at −0.5 bar gauge and >90% RH.

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Section: B Humiditymentioning

confidence: 99%

Impulsive Flashover Characteristics and Weibull Statistical Analysis of Gas-Solid Interfaces With Varying Relative Humidity

et al. 2020

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“…For the last decades, polymer isolator type has been popular to be used in transmission and distribution line due to its some advantages including hydrophobic characteristic, better thermal and dielectric characteristic, lighter, mechanically stronger than ceramic and glass types [8]- [10]. However, it is vulnerable to environmental impacts such as UV radiation, temperature, humidity, rain, and high pollution, etc [11], [12].…”

Section: Introductionmentioning

confidence: 99%

Performance Investigation of Polymer Isolator on Non-Soluble Pollutant of Distribution Sub Station

Sonong¹,

Yunus²,

Nawir³

et al. 2019

Proceedings of the 1st International Conference on Science and Technology, ICOST 2019, 2-3 May, Makassar, Indonesia

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Isolator has an important role as a separator of lived voltage system with unlived voltage system in distribution and transmission line. It is also used as wire support in distribution and transmission line. The main usual problem in an isolator is the pollutant layer on the isolator surface. The pollutant layer on the isolator surface could lead to breakdown voltage that might harm the electrical systems and human being. The polluted isolator can be conducted by Equivalent Salt Deposit Density (ESDD) and Non-Soluble Deposit Density (NSDD). The NSDD is material that capable of absorbing water and binding the salt pollutant on the isolator surface, this could prevent the maximum natural cleaning process during rainy session.

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Study on flashover voltage variation characteristics of roof pollution insulators

Chang¹,

Fan²,

Peng³

et al. 2022

MATERIALS SCIENCE, ENERGY TECHNOLOGY &Amp; POWER ENGINEERING IV (MEP 2021)

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Effect of Wetting Conditions on The Contamination Flashover Voltages of Polymer Insulators

Cited by 10 publications

References 2 publications

Impulsive Flashover Characteristics and Weibull Statistical Analysis of Gas-Solid Interfaces With Varying Relative Humidity

Impulsive Flashover Characteristics and Weibull Statistical Analysis of Gas-Solid Interfaces With Varying Relative Humidity

Performance Investigation of Polymer Isolator on Non-Soluble Pollutant of Distribution Sub Station

Study on flashover voltage variation characteristics of roof pollution insulators

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