• 조명전기설비학회논문지
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• 제24권8호
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• pp.78-83
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• 2010

본 논문은 배전선으로 널리 사용되고 있는 비닐캡타이어 타원형코드(Polyvinyl chloride insulated cabtyre oval cord, VCTFK)의 끝단에서 발생되는 트래킹의 진전특성에 대하여 언급하고 있다. 트래킹은 VCTFK의 끝단에 전해액을 적하함으로써 발생시켰다. VCTFK 끝단에서 발생되는 트래킹 진전과정 및 그 특징은 다음과 같다. 방전으로 인해 VCTFK 끝단에서 탄화가 시작되었고 침식도 일어났다. 도체에서 가까운 절연층이 먼저 침식되었으며, 피복층은 그 이후에 침식되었다. 침식이 진행된 이후, VCTFK 끝단의 표면에서 탄화물의 적층이 시작되었다. 적층 단계에서 아크를 동반했으며, 트래킹 파괴로 이어졌다.

• 한국안전학회지
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• 제19권4호
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• pp.42-47
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• 2004

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 Cabtyre Cord Flat-type) of $0.75mm^2,\;1.25mm^2,\;and\;2.0mm^2$. 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 $1.25mm^2$ was the strongest of them. When it was bent $826.3\pm7$ times, it appeared the disconnected tendency that element wires of VCTFK of $1.25mm^2$ are more about 1.67 times than element wires of VCTFK of $0.75mm^2$. In mechanical strength, VCTFK of $1.25mm^2$ is higher about 1.7 times than VCTFK of $0.75mm^2$. 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 $1.25mm^2$ is the strongest among samples, and it is the most useful in wires of movable type.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 하계학술대회 논문집 Vol.4 No.1
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• pp.464-467
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• 2003

In this paper, we analyzed on the characteristics of the stranded wire disconnected by bending stress. The stranded wire that used in the experiment are PVC insulated flexible cords(VCTFK) of $0.75mm^2,\;1.25mm^2,\;and\;2.0mm^2$. They are used to connect the load in low voltage. The stranded wires disconnected by bending stress were magnified with optical microscope. Using X-ray, the disconnected wire were photographed. we compared mechanical characteristics of the stranded wire between disconnected tendency and allowable current. On the mechanical strength of vinyl captyre ellipse type cords under bending stress, $1.25mm^2$ VCTFK was the strongest of them. When it was bended $826.3{\pm}7\;times$, it appeared the disconnected tendency that element wires of $1.25mm^2$ VCTFK are more about 1.67 times than element wires of $0.75mm^2$ VCTFK. In mechanical strength, $1.25mm^2$ VCTFK is higher about 1.7 times than $0.75mm^2$ VCTFK. Therefore, we found out that mechanical strength will be higher, if element wire is a lot. In comparison with bending stress, $1.25mm^2$ VCTFK is the strongest among samples, and then it is the most useful in wires of movable type.

• 한국화재소방학회논문지
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• 제18권2호
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• pp.7-11
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• 2004

본 논문에서는 비닐 캡타이어 전선(600 V, VCTFK, $2C{\times}1.25mm^2$)을 모델로 하여 과전류 시 전류크기 및 이격 거리에 따른 전선 상호간의 힘을 유한요소법(FEM)을 통하여 계산하며, 또한 직접 제작한 대전류 공급 장치(형명: EHT_EFAD, Korea 사용하여 과전류시 전류크기와 공급시간에 따른 전선 상호간의 최대 이격거리에 대하여 실험함으로써 과전류로 인한 전기화재 감식 시 기초 자료로 활용하고자 한다.

• 한국안전학회지
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• 제29권5호
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• pp.35-39
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• 2014

This paper is purposed to analyze the thermal characteristics of wiring according to the number of electric fans in operation for 10 fans over 10 year old and 10 fans less than 1 year old in livestock barn. In order to achieve the goal in the paper, it selected VCTFK, VFF, HIV, and CV wiring that were used most at 64 livestock barns in Cheongwon location through the research on the field investigation. Finally, it also analyzed the dangers by deducing the thermal characteristic data of 4 wiring. In addition, this paper suggested the mode of load current (the most frequently measured load current) of both over 10 years old and less than 1 year old electric fans. The data of this paper could be used for the maintenance and management of wiring and fire investigation of livestock barn as well as for materials of safe designs of wiring of electric fans.