• 제목/요약/키워드: Epoxy Bushing

검색결과 10건 처리시간 0.023초

카본 도포에 따른 Cu-Epoxy 접촉면에서 발생하는 크랙방지에 관한 연구 (A Study on the Prevention of Crack Generated in Interface Cu and Epoxy with Painting of Carbon)

  • 송재주;김성훈;황종선;박종광;한병성
    • 한국전기전자재료학회논문지
    • /
    • 제14권7호
    • /
    • pp.578-583
    • /
    • 2001
  • The bushing for high voltage and large and power should endure weight of itself and force of pushing from contact with circuit breaker. Like this, epoxy mold bushing has to be strong without fault. However, the external circumstances and internal factors was caused by partial discharge, flashover and dielectric breakdown. Therefore, to remove external factor of defect and to prevent the internal cracks and cavity generated from the contraction on interface of Cu-Epoxy, we should form semi-conductive layer on Cu bar by carbon. Then, the PD properties and the insulation qualities of epoxy mold type bushing was able to improved by roles of cushions for the direction of diameter and by effects fo natural sliding like as separated from conductor for the direction of length. So, in this work, we could prove the method of semi-conductive layer in making the long conductor.

  • PDF

Composite Hollow Bushing의 접합기술에 관한 연구 (A Study on Bonded Joints of Composite Hollow Bushing)

  • 조한구;강형경;유대훈
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2008년도 하계학술대회 논문집 Vol.9
    • /
    • pp.493-494
    • /
    • 2008
  • During the last years hollow core insulators started their success story in the field of high voltage engineering for electrical apparatus, substituting porcelain insulators. The termination, also named top and bottom fittings are used for the connection to the rest of the electrical apparatus. The top and bottom flange are attached to the composite to transmit mechanical load and also ensure the gas tightness. They are bonded by epoxy glue with a glass transition temperature of about $130^{\circ}C$-$150^{\circ}C$ the glass reinforced epoxy tube of filament winding. This paper describes the results of a study on the bonded joints of fiber reinforced epoxy tube and cast aluminum. This suggests that surface roughness and glue types play an important role in evaluating of gas sealing capability on the flange and fiber reinforced epoxy tube in the composite hollow bushing.

  • PDF

38kV VCB용 에폭시부싱 신뢰성평가 (Reliability Assessment of Epoxy Bushing used for VCB rated 38kV)

  • 김민규;허대행;김익수
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2008년도 Techno-Fair 및 합동춘계학술대회 논문집 전기물성,응용부문
    • /
    • pp.133-134
    • /
    • 2008
  • This paper describes a testing method to assess the reliability of the epoxy bushing used for the vacuum circuit breaker(VCB). Especially, in order to show the long-term durability of epoxy bushing in a short testing duration, the extremely accelerated electric stress applying test plan was adopted.

  • PDF

가공개폐기용 폴리머 부싱 개발 (Development of Polymer Bushing for Overhead Line Switch)

  • 최경선;주종민;이철호
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2001년도 하계학술대회 논문집
    • /
    • pp.787-790
    • /
    • 2001
  • Polymer bushing used for overhead line switch was designed and investigated. Requirements of electrical ratings such as partial discharge, ac withstand voltage, impulse voltage and material properties were proposed in accordance with IEEE 386 and pre-standard (PS) 151-146∼147, 170∼180 of KEPCO. The polymer bushing consists of an internal epoxy bushing and external housing made of EPDM rubber. The rubber housing was molded with mold cone. Therefore, the polymer bushing offers several advantages like light weight, good sealing properties, easy installation and excellent performance in contamination. Electric field analysis was also introduced in order to verify the reliability of the design.

  • PDF

부싱형 커패시터를 이용한 고전압 계측시스템에 관한 연구 (A study on high-voltage measuring system using bushing-type capacitor)

  • 강문성;심형관;유충현
    • 대한전기학회논문지:전력기술부문A
    • /
    • 제48권5호
    • /
    • pp.502-507
    • /
    • 1999
  • An improved, accurate and reliable high-voltage measuring system utilizing a bushing-type capacitor is proposed in this study. This system measures voltages and phase angles of three-phase 22.9 kV power distribution lines and provides enough current to charge a battery for a motor-driven load switch and to operate the measuring and communication circuits for the distribution automation. For reliability, epoxy resin was used as the dielectric material of the bushing-type capacitor since the dielectric strength of epoxy resin is very stable over the wide range of temperature. Capacitances were investigated and found to be stable over the wide range of temperature and applied voltage, and the results indicate that the proposed measurement system is very reliable.

  • PDF

에폭시 몰드형 BCT의 절연열화 특성 (Characteristics of Insulation Degradation in Epoxy Mold Type BCT)

  • 송재주;이정철;임성훈;고석철;한병성
    • 한국전기전자재료학회논문지
    • /
    • 제18권10호
    • /
    • pp.902-908
    • /
    • 2005
  • Various stresses (such as electrical stress, mechanical stress, environmental and electrochemical stress, and defects of structure) result in insulation degradation of epoxy mold type insulators. Since the insulation degradation of BCT(Bushing Current Transformer) and bushing proceeds during fabrication process or operation time due to these causes, various methods to reduce the degradation in their insulation ability have been suggested. In this paper, we investigated surface temperature increment of these insulators due to PD(partial discharge). After the voltage applied into the insulator to generate the artificial PD, the surface temperature of the insulator was measured with non-contact thermometer using infrared rays. It was confirmed through the analysis based on PD experiments that the procession in the insulation degradation of the insulator could be estimated through the measurement of the surface temperature in the insulator.

Epoxy-Cu간 접촉면에서의 절연특성 개선 (Reformation of Dielectric Property in interface between epoxy and Cu)

  • 송재주;김성홍;정남성;황종선;한병성
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2000년도 추계학술대회 논문집
    • /
    • pp.9-12
    • /
    • 2000
  • Insulators for high-voltage and large-power should be endured mechanically the weight of mold bushing itself and the force of pushed from contact with circuit breaker and conductor. But dielectric breakdown could be occurred result from the external circumstances and internal factors such as chemical reaction, partial discharge, change of temperature and the relation of temperature-time in process of casting. Therefore, to get rid of external and internal factors of dielectric breakdown. Furthermore, to prevent the internal cracks, void, cavity which resulted from the contraction originated on the interface between copper and epoxy resin, formed semi-conductive layer with partially carbon painted on copper bar. The PD properties and the insulation qualities of epoxy molded insulators were improved by roles of cushions for the direction of diameter and natural sliding effects as like separated from conductor for the direction of length.

  • PDF

전압검출기능을 내장한 에폭시 부싱의 특성 평가(II) (The Characteristics Evaluation of Epoxy Bushing with Voltage Detection Function)

  • 안상호;김익수;최재구;함길호;이창준
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1999년도 추계학술대회 논문집 학회본부 C
    • /
    • pp.1038-1040
    • /
    • 1999
  • 산업이 발달하고 전력소비의 경향이 고밀도화 되면서, 전력계통이 대용량화 초고압화 되어가고 있다. 이러한 전력 기술 동향에 대처하기 위해서 모든 전기부품들이 소형화 및 절연능력 향상이라는 두 가지의 기술상의 요구가 필수적으로 요구되고 있다. 또한 계통의 안정성을 확보하기 위해 활선상태에서의 전력계통 감시에 대한 필요성 역시 증대되고 있다. 이러한 요인을 충족시키기 위하여 전압검출 기능을 내장한 에폭시 부싱을 개발중에 있으며, 그 성능을 검증, 향상시키기 위한 작업을 수행하였다. 본 시험에서는 전기적 절연물로 사용되고 있는 에폭시 부싱에 관한 성능평가 시험을 수행 하였으며, 하계 학술대회에 그 내용을 일부 발표하였다. 본 논문은 전압검출기능을 내장한 에폭시 부싱의 특성 시험 수행결과중 추가로 평가된 부분을 서술하였다.

  • PDF

부하개폐기용 고전압 계측제어 장치에 관한 연구 (A Study on the High-Voltage Measuring & Control System for a Load Switch)

  • 박정훈;홍성훈;강문성
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1998년도 하계학술대회 논문집 B
    • /
    • pp.757-759
    • /
    • 1998
  • This paper proposes a new high-voltage measuring system that is able to provide current enough to charge a storage battery for a motor driving a load switch, and detect each phase voltage and phase angle in three phase distribution line accurately. In order to develop the reliable voltage measuring system we had designed and manufactured condenser-type bushing having good characteristics for temperature on account of using epoxy resin as dielectric material, and investigated the variation characteristics of capacitance via variation of applied voltage. The experiment results show that the proposed condenser has good characteristics to environmental changes.

  • PDF