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최충석,송길목,김동우 한국안전학회 2004 한국안전학회지 Vol.19 No.4
In this paper, we analyzed on the characteristics of the stranded wire disconnected by repeated stress. The stranded wires that were used in the experiment are PVC insulated flexible cords(VCTFK: Vinyl Insulated Vinyl Cabtyrc Cord Flat-type) of 0.75mm², 1.25mm², and 2.Omm². They are used to connect the load in low voltage. The stranded wires disconnected by repeated stress were magnified with optical microscope. Using X-ray, the disconnected wire were photo-graphed. we compared mechanical characteristics of the stranded wire between disconnected tendency and allowable current. On the mechanical strength of vinyl cap tire ellipse type cords under bending stress, VCTFK of 1.25mm²was the strongest of them. When it was bent 826.3±7 times, it appeared the disconnected tendency that element wires of VCTFK of 1.25mm²are more about 1.67 times than element wires of VCTFK of 0.75mm². In mechanical strength, VCTFK of 1.25mm² is higher about 1.7 times than VCTFK of 0.75mm². Therefore, we found out that mechanical strength was higher, when the wire had a lot of element wires. In comparison with bending stress, VCTFK of 1.25mm²is the strongest among samples, and it is the most useful in wires of movable type.
누전차단기 외함 전원측 단자사이의 트래킹에 의한 탄화특성 분석
최충석,송길목,김동우 한국화재소방학회 2003 한국화재소방학회논문지 Vol.17 No.4
본 논문은 누전차단기 외함 전원측 단자사이에서 발생하는 전기화재 원인에 대한 분석을 연구하였다. 누전차단기는 보호범위의 전기시설물에서 누전 또는 과부하에 의한 차단을 목적으로 한다. 누전차단기의 전원측 단자는 트래킹에 의해 화재로 쉽게 이어질 수 있다. 따라서, 누전차단기의 재현실험을 통해 트래킹시료(E₁)와 화재현장에서 트래킹된 것(S₁)을 비교분석하여 전기화재의 원인을 밝히는데 중요한 자료가 되도록 하였다. 실험은 IBC Publ. 112법을 응용하여 실시하였고 누전차단기에서 미소방전과 건조대가 발생한 후 소손되는 것을 확인하였다. E₁센서 전원측 단자간의 절연저항은 약 25.7Ω이고 S₁ 절연저항은약 58.6Ω이었다. E₁의 발열피크는 491.0℃ 603.2℃였다. 603.2℃에서의 발열피크는 트래킹에 기한 것이다. S₁의 발열피크는 593.1℃에서 나타났다. 트래킹에 의해 변화된 시료는 IR 흡수스펙트림에서 1590 cm-¹ 서 흡광피크가 나타나지 않았다. In this paper, we studied on the characteristics of RCD(Residual Current Device) case deteriorated by tracking, and compared the tracked samples between in the site of fire(S₁) and in the reappearance experiment(E₁). This experiment is applied to IEC Publ. 112 method. Electrical fire by tracking occurred after scintillation and dry-band generated. The insulation resistance between source terminals of RCD case was about 25.7 Ω in E₁ and the resistance was about 58.6 Ω in S₁. The exothermic peaks of E₁ appeared at 491.0℃ and 603.2℃. The exothermic peak at 603.2℃ was shown by tracking. And the exothermic peak of S₁ appeared at 593.1℃. In spectrum of S₁ and E₁, absorption peak didn't appear at near 1590 cm¹.
베타카로틴 함유 마이크로에멀젼의 제조 및 물리화학적 특성 평가
곽은선,이종화,박목순,이계원,지웅길 충남대학교 약학대학 의약품개발연구소 2000 藥學論文集 Vol.16 No.-
The o/w microemulsions containing β-carotene were made from 3 or 5% w/w oil(soybean oil, cottonseed oil and isopropyl myristate) and 15, 20 or 25% w/w nonionic surfactant (Cremophor EL, Cremophor RH 40 and Brij 97/Pluronic F-68(2:1 w/w). They are characterized by particle size distribution, surface tension and viscosity. Also, stability study was done by antioxidant, long-term storage for 6 months.
송길목(Kil-Mok Shong),한운기(Woon-Ki Han),이기연(Ki-Yoen Lee),곽희로(Hee-Ro Kwak) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Electrical current always travels through the minimum resistance path. In this paper, we are studied on the direction and formation of carbonized conductive path according to surface leakage between electrodes. The analysis of characteristics of the arc discharge as surface is broken down between exposed live parts. Using the HSIS(high speed imaging system, l00,000fps, redlake Itd., USA), it tock photographs by arc growth mechanism occurred in on/off surge, ground fault and discharge between electrodes. Therefore, It recommended for results of technology development and application such as theoretic verification of an arc direction and economic security according to a technology about connecting arc generation in surfaces of insulators. Hereafter, it expected effects that application of energy utility technology through the arc control.
자외선 검출이미지를 이용한 폴리머 애자의 연면방전 특성해석
송길목(Kil-Mok Shong),김영석(Young-Seog Kim),박상택(Sang-Taek Park) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.4
In this paper, it's described the UV detected images on polymer insulators using UV camera. The patterns of UV detected images are classified into 3 types such as jellyfish (J), amoeba (A), sunflower(S). J type is detected by high electric field in air. A type is detected by early surface discharge. And, S type is detected by the serious problem in surface of insulator.
22.9[㎸]급 애자의 표면오염에 의한 자외선 영상과 열화판정
송길목(Kil-Mok Shong),김영석(Young-Seok Kim) 한국조명·전기설비학회 2010 조명·전기설비학회논문지 Vol.24 No.1
본 연구에서는 22.9[㎸] 애자의 표면오염에 의한 자외선 영상과 거동을 통해 자외선 이미지 형태 판단법을 정의하였다. 코로나 방전에 의해 나타나는 자외선 영상은 아메바, 젤리피쉬, 썬플라워 형태 등 3가지로 나누어지며, 세부적으로는 8개의 진행 메커니즘으로 구분하였다. 전력설비가 설치된 현장에서는 즉각적으로 이 판단 방법으로 전력 설비의 열화된 부분을 찾을 수 있다. 이는 신뢰성 있는 데이터를 통해 전력설비의 열화를 판단하는 기준에 활용이 가능하다. 향후 현장진단에 적합한 기술로서의 연구가 활용될 것이다. In this paper, the ultraviolet rays images and aging judgement caused by surface contamination on 22.9[㎸] class insulators was defined. UV images represented by the corona discharge are divided 3 types such as sunflower, jellyfish, amoeba and in detail, there are classified the progress mechanism of eight. In the field which is installed the power facilities, immediately, this judgement method can be found out the deteriorated parts of the power facilities. These steps are possible to judge the deterioration of power facilities through reliable data. Hereafter, this study as the diagnostic technology suitable for the sites is used.