• Title, Summary, Keyword: EPDM polymer insulator

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EPDM Compounds for Electric Insulator (전기 절연용 EPDM Compounds)

  • Kim, In-H.;Hwang, S.H.;Kim, Jin-K.
    • Elastomers and Composites
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    • v.34 no.5
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    • pp.407-413
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    • 1999
  • Non-ceramic composite insulator has been interested in the power industry because of its good characteristics in mechanical properties, mass product and design availability. Also it is lighter, and less unexplosive, compared to a ceramic insulator. Especially EPDM rubber composite insulator can be used for long-term in contaminated environments because of its hydrophobicity. This paper showed the rheological properties, the electrical properties, and contact angles to check the hydrophobicity and the recoverability of the EPDM compounds. Also, we investigated surface morphology of the compound by SEM.

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Diagnosis Technique of Surface Contamination Degree for EPDM Insulator according to Variation of Environment Condition (환경조건의 변화에 따른 EPDM 애자의 표면 오손정도의 진단기술)

  • Park, Jae-Jun;Choi, In-Hyuk;Kim, Jeong-Boo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.10
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    • pp.1132-1141
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    • 2004
  • The waveforms of the leakage currents for the surface discharge according to the degree of salt contamination and the variation of environmental condition on the EPDM polymer insulators, were shown in this paper. The variation phenomena of fundamental wave, 3rd and 5th harmonic waveforms were also shown from the beginning of the applied voltage and to the flashover voltage. To develop the technique of percentage contamination degree of EPDM polymer insulator according to the variation of environmental condition, the distortion degree of 3rd and 5th harmonic wave to the fundamental wave was utilized through the spectrum analysis for the waveforms of leakage current in the simulation of salt and fog test. The fact that distortion degree % of 3rd and 5th harmonics for fundamental wave is a necessary indicator for the assessment of contamination degree for the polymer insulators, was known.

Leakage Current Waveforms and Spectrum Analysis of EPDM Polymer Insulator according to Environment Condition (환경조건에 따른 EPDM 고분자 애자의 누설전류파형과 스펙트럼 분석)

  • Park, Jae-Jun;Kim, Jeong-Boo;Song, Young-Chul
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.82-86
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    • 2004
  • This research is about the result of leakage current waveform about the situation of surface leakage current and environmental changes(Salt fog, clean fog and rain) by EPDM polymer insulators' amount of salt. The researcher presents the result of changing about fundamental harmonic, 3rd harmonic and 5th harmonic from starting point of supplying power to flashover. In this study, researched environmental affects (clean fog, salt fog and rain) about surface aging of polymer insulators and used frequency spectrum of leakage current waveform to develop the diagnostic technique of surface aging. When amount of salt contents changed, surface aging stage and the degree of aging (distortion factor) about 3rd and 5th harmonic waveform on low frequency harmonic wave. The distortion factor which is harmonic percentage about basic harmonic is important pointer to evaluate the surface condition of polymer insulators.

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Harmonics Analysis of Leakage Current Waveforms and Surface Discharge for EPDM Polymer Insulator (EPDM 고분자 애자에 대한 표면방전 및 누설전류파형의 고조파분석)

  • 박재준;양태규
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.9
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    • pp.1013-1021
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    • 2004
  • This paper presents the results of spectrum analysis of leakage current waveforms on contaminated polymer insulators under fog conditions. This is a basic study on development of a monitoring for aging degree and surface pollution state using distortion rate(%) of 3rd and 5th harmonics according fundamental frequency[60Hz] under environment conditions. Arcing on the surface was always associated with distortion in the leakage current ; hence the low frequency components of the leakage current can be used as a means to evaluate the surface degradation. The results indicate that the distortion rate by spectrum analysis is available for the monitoring of contamination condition of EPDM Polymer insulators.

A Study on Mechanism about Contaminant Accumulation of Insulator Surface (애자표면의 오손물 누적에 관한 메커니즘 연구)

  • Park, Jae-Jun
    • The Journal of Information Technology
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    • v.8 no.2
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    • pp.85-91
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    • 2005
  • We studied a pollution mechanism for simulation of contamination environment in industrial concentrated area of around a metropolitan that made to circulated flow in the chamber. In case of the virgin both side of EPDM or Silicon insulator, we confirmed that the pollution to much more than service insulator in the field. Also contamination of initial state of the virgin didn't falling in spite of physical outside factor easily. This study confirmed to that the silicon was too much accumulated pollution contrast to EPDM insulator from scatter(spray) point to regular interval position use the Kaolin contaminant in the chamber. There are effected to the hydrophobicity of polymer insulator due to the pollution. In ceramic insulator, we get to know that pollution is much more at the Post insulator with vertical than with horizontal setup insulator.

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A Study on Kaolin Contaminant Accumulation Contents and Leakage Current Variation (카올린 오손물 누적량 및 누설전류 변화에 관한 연구)

  • Park, Jae-Jun;Song, Il-Keun;Lee, Jae-Bong
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.145-146
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    • 2005
  • This study performs a simulation for an accumulation mechanism of contaminants, which were produced in an industrial belt of inland, on the surface of insulators. From the simulation, silicon insulators presented higher accumulation than that of EPDM(Ethylene Propylene Diene Terpolymer : EPDM) insulators on the same distance in the case of the Virgin polymer insulator, and this result presented the same result in the insulator applied in actual fields. In the case of the accumulation test for the Virgin insulator and insulators used in actual fields, it is evident that the Virgin insulator presented more accumulation than that of the insulator used in actual fields. The results can be caused by the generation of LMW (Low Molecular Weight) on the external material of polymer insulators, and the level of the accumulation can be changed according to the degree of the continuous generation of LMW.

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Fractal Application of EPDM Insulator Using Surface Di (SD를 이용한 EPDM애자의 프랙탈 응용)

  • 임장섭;김상준;송일근
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.410-413
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    • 1999
  • Many researcher make efforts to develop an effective tracking method of accellatinn combined with the field simulation in actual system. Specially, the procelain type insulator is required exchanging to EPDM/SIR polymer insulator according to the recently environmental consideration. In this paper, we have developed the estimation system using the SD testing and the fractal mathematics. Those approach has been very successful to relative applied to the various parctical problem

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Estimation of EPDM Insulator in Distribution Line Using PD Measurement (PD 측정을 이용한 배전용 EPDM애자의 성능평가)

  • 송일근;임장섭;이형구;천종욱
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.319-322
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    • 1998
  • Many researchers make efforts to develop an effective material with anti-degradation property. Specially, the porcelain type insulator is required exchanging to polymer insulator acceding to the environmental consideration In this paper, we have developed the estimation system using the PD testing. The approach of PD has been very successful applied to the various practical insulator.

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Estimation of Tracking Properties in the EPDM (EPDM애자의 트래킹성성 평가)

  • 임장섭;김덕근;정우성;오수홍
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.218-221
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    • 1999
  • Many researchers make efforts to develope an effective material with anti-tracking property. Specially, the porcelain type insulator is required exchanging to polymer insulator according to the environmental consideration. In this paper, we have developed the estimation system using the translated IEC-60587 test for the application of actual insulator. Those approach has been very successful applied to the various practical insulator.

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Estimation of EPDM Insulator in Distribution Line Using PO and SO Measurement (PD 및 SD를 이용한 배전용 EPDM애자의 절연성평가)

  • Lim, Jang-Seob;Song, Il-Keun;Lee, Hyung-Gu;Cheon, J.W.
    • Proceedings of the KIEE Conference
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    • pp.973-975
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    • 1998
  • Many researchers make efforts to develop an effective material with anti-degradation property. Specially, the porcelain type insulator is required exchanging to polymer insulator according to the environmental consideration. In this paper, we have developed the estimation system using the PD & SD testing. Those approach has been very successful applied to the various practical insulator.

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