• 한국건축시공학회지
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• 제11권2호
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• pp.127-135
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• 2011

본 연구에서는 단열소재 종류 및 조합의 치환률 변화에 따른 외벽단열패널의 공학적 특성에 대하여 분석하였는데, 그 결과 굳지않은 모르터의 플로우의 경우 단열소재 치환률이 증가할수록 급격히 저하되는 결과를 나타내었으며, 공기량의 경우 단열소재 치환률이 증가될수록 점차 증가되는 결과를 나타내었다. 경화 모르터의 휨강도의 경우 단열소재 치환률이 증가될수록 전반적으로 플레인에 비해 점차 강도가 저하되는 경향을 나타내었으나 PL 2% 치환 시 증가되는 결과를 나타내었다. 열전도율의 경우 단열소재 치환률이 증가될수록 급격히 낮아지는 경향을 나타내었으며, 단위용적 질량과 열전도율의 상관관계의 경우 단위용적질량이 감소할수록 열전도율은 우수한 결과를 나타내었다. 단열소재 종류 및 조합에 따른 휨강도의 경우 전반적으로 플레인과 유사한 강도값을 나타내었으나 V+CB+PL을 3% 치환한 조합의 경우 모르터 내부가 밀실해짐에 따라 강도값이 증가되는 결과를 나타내어 단열소재 종류 및 조합 가운데 가장 우수한 결과를 도출할 수 있었다.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 추계학술대회 논문집
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• pp.39-43
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• 2007

In this paper the experiments of breakdown characteristics $SF_6$ liquid ($LSF_6$) in model GIS(Gas Insulated Switchgear) were described. From the experiments results, The ability of $LSF_6$ insulation is higher than high-pressurized $SF_6$ gas. The breakdown characteristics of $LSF_6$ were produced by bubble formed evaporation of $LSF_6$ and bubble caused by high electric emission. It is considered in this paper that the results are fundamental data for electric insulation design of superconductor and cryogenic equipments machinery which will be studied and developed in the future.

• 조명전기설비학회논문지
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• 제28권2호
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• pp.19-23
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• 2014

In this paper the experiments of breakdown characteristics of rod-electrodes by pressure and gap change of imitation-air were described. The results are fundamental data for electric insulation design of distribution power facilities which will be studied and developed in the future. And we could make an environment friendly gas insulation material with mataining dielectric strength by imitation air which generates a lower lever of the global warming effect.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 추계학술대회 논문집 전기물성,응용부문
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• pp.198-200
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• 2003

In this paper, electrical characteristics of EP(engineering plastic) studies for the purpose of electrical insulation materials. A base resin of the EP are Polyamide and Polyphthalamide. And filler is Glass Fibre. Electrical characteristics of EP represents volume resistivity, arc resistance and breakdown voltage according to glass fiber contents. We compare before water immersion and after water immersion. As the results of experiments, Polyphthalamide has good characteristics of insulation material rather than Polyamide as an insulator for electrical power system.

• 조명전기설비학회논문지
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• 제27권8호
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• pp.16-20
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• 2013

In this paper the experiments of breakdown characteristics by pressure and gap change of imitation air were described. The results are fundamental data for electric insulation design of distribution power facilities which will be studied and developed in the future. And we could make an environment friendly gas insulation material with mataining dielectric strength by Imitation Air which generates a lower lever of the global warming effect.

• 한국전기전자재료학회논문지
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• 제18권7호
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• pp.675-681
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• 2005

$SF_6$ is widely used as gas insulation medium because of having excellent dielectric and arc-quenching properties. However the use of it is getting to be suppressed from the viewpoint of mitigating global warming. For the development of environmentally-benign electric power equipment and system, novel gases or mixture gases are strongly required as the substitute of $SF_6$ gas. In this study the authors constructed an experimental system to investigate insulation properties of the mixed gases composed of negative $gas(SF_6)$ and electron deceleration gases$(N_2\;and\;CO_2)$. Breakdown and prebreakdown characteristics of $SF_6/N_2/CO_2$ mixture gases were investigated using the above mentioned system for different rates and gas pressures.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2010년도 하계학술대회 논문집
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• pp.49-49
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• 2010

In this paper, a full scaled gas discharge chamber was designed and fabricated for evaluating the dielectric performance of SF6/N2 mixture gases. And it describes work on AC and lightning impulse dielectric characteristics of SF6/N2 mixture insulation gas from experiments and full scale models.

• Journal of Electrical Engineering and Technology
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• 제8권1호
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• pp.176-182
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• 2013

In this study, we examine the tracking happen in a polyvinyl-chloride-sheathed flat cord (PVCSFC), which is widely used as a distribution cord. The study classifies the bridge current via the formed conductive paths during tracking in the PVCSFC. Further, it attempts to distinguish the characteristics of heat generation and heat transfer by kind of bridge current. When the PVCSFC is in the static state, the bridge currents flow only through the electrolyte bridge. In the case of the carbonized PVCSFC, the bridge currents flow through one or more conductive paths. One is the electrolyte bridge, the other is the bridge that is consisted electrolyte and carbonized insulation. Currents flowing through different conductive paths have different heat generation and transfer characteristics. As the bridge current flowing in the conductive path consisting of electrolyte and carbonized insulation increases, the temperature difference between the surface of the PVCSFC and ambient air also increases correspondingly.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 춘계학술대회 논문집
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• pp.335-338
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• 2008

With the improvement of industrial society, the high quality electrical energy, simplification of operation and maintenance, ensuring reliability are being required Also we request urgently change a $SF_6$ for an environment friendly gas insulation material. In this paper the experiments of breakdown characteristics by pressure and gap change of Imitation-Air in model GIS(Gas Insulated Switchgear) were described. Also assess of breakdown characteristics about Imitation-Air and $SF_6$. It is considered in this paper that the results are fundamental data for electric insulation design of Distribution Power Facilities which will be studied and developed in the future.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2001년도 춘계학술대회 논문집 유기절연재료 전자세라믹 방전플라즈마 연구회
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• pp.193-196
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• 2001

XLPE is occasionally happened to deteriorate cable insulation characteristics. It is happened to do a breakdown state by the degradation of electrical characteristic and electrical breakdown strength. I prepared TR-XLPE (Tree-Retardant XLPE) as adding various additives to prevent its states. Various additives are treeing retardants, anti-oxidants. Treeing retardants three kinds of aromatic compounds as adding each additive. Anti-oxidants use quinone compound and cresol compound as adding each additive. In order to observe each electrical characteristics, I measured breakdown strength, relative dielectric constant$({\varepsilon}_r)$, dielectric loss tangent$(tan{\delta})$. TR-XLPE specimens as adding treeing retardants and anti-oxidants enhance breakdown strength, ${\varepsilon}_r$, $tan{\delta}$ than pure XLPE.