• Title, Summary, Keyword: Insulator

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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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Development of Live-line Insulator Inspection Robot System for both Suspension and Tension Insulator Strings (현수/내장애자련 겸용 활선애자 점검로봇 시스템 개발)

  • Park, Joon-Young;Lee, Jae-Kyung;Oh, Ki-Yong
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.6
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    • pp.1239-1244
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    • 2011
  • In our previous paper, we developed an insulator inspection robot system for a suspension insulator string in the 345kV power transmission line. However, this robot cannot be applied to a tension insulator string, because its constituent insulators are different in diameter and height from those of a suspension insulator string. To solve this problem, we developed a new live-line insulator inspection robot system that is applicable to both suspension and tension insulator strings. We confirmed its effectiveness through live-line performance tests.

Development of Section Insulator with Improved Wear Characteristics (내마모성이 우수한 절연구분장치 국산화 개발)

  • Lee, Kiwon;Jung, Hosung;Park, Young;Cho, Ho Ryung;Lee, Sang Sik
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.62 no.11
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    • pp.1633-1639
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    • 2013
  • In a section of AC electric railway, a phase between the sections is different although voltage levels supplied from substations are the same. Therefore, section insulators have been installed to electrically divide between the sections. Two differenet types of section insulator, namely an overlap type and insulator type, are used. In Korean high-speed lines, overlap type section insulator has been adopted. And, insulator type is used in conventional line. The overlap type has the advantage of having no speed limit, but has the disadvantage of requiring long section length. However, the insulator type has the advantage of section length, but also has the disadvantage of having speed limit. In Korean conventional line, an insulator type one relies on the import and there is some problem with wear. In this study, we developed the insulator type section insulator which adopts Teflon tube insulation material. The Teflon material has advantage of the excellent electrical characteristics and wear-resistance characteristics for a longer expected life than that made of existing FRP. In order to compare wear characteristics between the materials, wear tests with reciprocal wear tester are performed. And dynamic behavior tests between the insulators and pantograph are also performed for showing its better dynamic characteristics.

Development of Robot Mechanism for Cleaning and Inspection of Live Line Insulator (송전선로 활선 애자 청소 및 점검용 로봇 기구부의 개발)

  • Park, Joon-Young;Cho, Byung-Hak;Byun, Seung-Hyun
    • Proceedings of the KIEE Conference
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    • pp.421-423
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    • 2005
  • Power transmission lines have been playing a key role as the mainstay of national industry. When a power failure occurs, it can have severe effects on national security as well as national industry and economy. In this paper, we consider an insulator failure, which is one of the main causes of such a power failure. In spite of its importance, however, a shortage of manpower in the insulator maintenance field is getting more serious due to working environments with a high voltage and a high place. For this reason, a new active maintenance technique using a robot system is required to prevent such an insulator failure. In this paper, a new robot mechanism for insulator cleaning and inspection was developed. We confirmed its effectiveness through experiments.

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A Study On The Robust Structure For Improvement of Front Insulator Noise Improvement (전륜 Insulator 이음 개선을 위한 강건 구조 방안 연구)

  • Lee, Sang Jong
    • Journal of Applied Reliability
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    • v.17 no.3
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    • pp.197-206
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    • 2017
  • Purpose: Clarify the cause of the noise by the front wheel strut insulator, which is located in close proximity to the driver's seat. Methods: The improvement mechanism was confirmed through failure analysis and reproduction test of the joint generation mechanism. In addition, the main factors were analyzed through principal test. Results: This paper describes the mechanism of occurrence of noise due to deterioration and hardness increase of rubber, deformation on severe road surface, foreign matter and water inflow in cold weather. Conclusion: We found that the insulator and body deformation can be minimized without increasing the thickness of the body and the insulator and reinforcing the body by dispersing the input load by applying load distribution structure instead of the local forming structure of the insulator in the insulator robust structure.

Surface Ageing Property of Polymer Insulator for Transmission line with Forest Fire Test (송전용 폴리머 애자의 산불 모의시험에 따른 표면열화 특성)

  • Cho, Han-Goo;Kim, Kyang-Young
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.110-110
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    • 2010
  • Suspension insulator have made use of porcelain insulator mainly, but polymer insulator is using recently. Polymer suspension insulator have advantage that it is light than porcelain insulator. The ageing performance is excellent and it is possible for mass production. There is high possibility of mountain fire because a lot of potential inflammables such as fallen leaves are stacked on the ground Therefore surface aging of polymer insulator most of the overhead transmission lines in Korea are operated on the mountain need analysis of transmission line into forest fire. surface aging property is analyzed by SEM, EDX, XPS, FTIR, DSC in this paper.

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Analysis of Dielectric Characteristics of 400kN Suspension Insulator Using FEM (FEM을 이용한 400kN 현수애자의 절연특성 해석)

  • Choe, Jae-Gu;Kim, Ik-Su;Mun, In-Uk;Seo, Hyeong-Gwon
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.51 no.2
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    • pp.80-84
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    • 2002
  • This paper presents some of the results of current research on 400kN Suspension Insulator Design. In this paper, authors carried out 2-dimensional field calculation in order to analyse dielectric characteristics of the insulator unit and 3-dimensional field calculation in order to analyse dielectric characteristics of the insulator strings. And the results of puncture tests of insulators were compared with the required field intensity of the insulator As results, it was found that electric field on the insulator unit is severest between two triple junctions, dielectric characteristics of insulator strings are much influenced by the surrounding configuration and the manufactured insulators have good results of puncture tests.

Multi-Stress Aging Test Technology for Suspension Polymer Insulator (폴리머 현수애자의 복합가속열화 평가기술)

  • Park, Hoy-Yul;Kang, Dong-Pil;Kim, Ik-Soo;Shin, Young-Jun
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.481-484
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    • 2003
  • Recently polymer insulators are being used for outdoor high voltage applications. Polymer insulators have significant advantages over porcelain and glass insulators. With the gradual improvement of their design and material, their reliability has also increased. It is however difficult to establish how they will perform after several years of service. Aging of the insulator weathershed may lead to damages such as excessive chalking and crazing, erosion and tracking which affect the insulator performance. In service insulator are subjected to aging stresses such as humidity, pollution and electrical field which act singly or in combination. There have been numerous accelerated laboratory tests developed with the intention of evaluating suitability of polymeric materials. Some of these are strictly material tests, where as, others evaluate full scale devices. Service experience plays a key role in the utility selection of polymer insulator, but is time consuming, and may not always be available. Hence there is a need for a meaningful and reliable accelerated aging test for polymer insulator. This paper describes multi-stress aging test for reliability of polymer insulator This paper presents the rule of multi-stress aging test and test chamber for polymer insulator in korea electrotechnology research institute.

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A Study on Field Vibration for Fault Cause Analysis of Glass Insulator on High-speed Railway (고속철도 유리애자 파손원인을 위한 현장 진동 연구)

  • Kim, Young-Seok;Shong, Kil-Mok;Bang, Sun-Bae;Kim, Sun-Gu;Ryu, Young-Tae
    • Proceedings of the KIEE Conference
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    • pp.189-190
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    • 2008
  • This study was investigated a possibility of fault of glass insulator due to vibration on high-speed railway. The proper vibration of 1-glass insulator have many frequency band and high amplitude showed in high frequency than low frequency. The proper vibration of strut tube insulator was lowest 170Hz, highest 1.5kHz. The field signal amplitude of viaduct and open route were biggest moment pantograph of high-speed rail. The surface vibration(V3) amplitude of strut tube insulator was biggest. From the FFT analysis of viaduct and open route, the strut tube insulator effect by vertical vibration was big, the frequency was 82.5Hz and 105Hz, respectively. However, in comparison with the proper vibration of strut tube insulator, the resonance was not observed. Although the amplitude of insulator is high, the possibility of fault is low because the glass insulator deterioration by the accumulation of vibration do not happen.

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The aging test method of insulator and development prospect of polymer insulator (배전용애자의 경년시험방법과 폴리머애자의 개발 동향)

  • Song, I.K;Kim, S.J.;Kim, J.Y.;Kwak, H.R.
    • Proceedings of the KIEE Conference
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    • pp.1791-1793
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    • 1996
  • This paper describes Thermal-Mechanical performance and Ultimate Mechanical-Strength test for the purpose of aging analysis of suspension insulator. The temperature difference of insulator surface according to the aging of suspension insulator brought out about $2^{\circ}C$ to $7-8^{\circ}C$ difference comparing with the atmospheric temperature. Quality standard and Mechanical-Strength of used suspension insulator deteriorate more remarkably than that of new suspension insulator. It is required that Thermal-Mechanical performance test standard be revised in the future. And it is described about the development prospect of polymer insulators

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