• Aerospace Engineering and Technology
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• v.11 no.1
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• pp.1-6
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• 2012

Power system in satellite is protected by installing fuses, LCLs (Latching Current Limiters), etc. between satellite power supply and loads. In this paper, the fuse sizing technique for satellite power system protection is addressed. Detailed fuse sizing method is explained and it is shown that the single fuse connection method is mathematically subordinated to the parallel fuse connection method. In addition, appropriate fuse selection method is newly suggested under a situation where exact current characteristics of a load connected to a fuse is unknown.

• Product Safety
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• no.1 s.157
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• pp.48-49
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• 2007

대부분의 전기제품에는 퓨즈가 내장되어 있다. 퓨즈는 '과전류의 영향으로부터 전기회로를 보호하는 안전장치'이다. 전기제품에서 퓨즈의 역할은 매우 중요하다. 왜냐하면, 과전류를 차단하지 못하면 이는 곧 화재나 감전 등으로 이어질 수 있기 때문이다. 이번 호에서는 이렇게 중요한 퓨즈의 원리 및 구조 등에 대해서 알아보도록 하겠다.

• Proceedings of the KIPE Conference
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• 2020.08a
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• pp.318-319
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• 2020

본 논문에서는 직류 시스템에 적용된 퓨즈를 수 ms 내에 용단시키기 위해 대전류를 주입하여 퓨즈의 I²t에 빠르게 도달시키는 방법을 제시한다. 대전류 주입을 목적으로 상시 충전된 커패시터를 퓨즈에 병렬 연결하여 과전류가 감지되면 방전시킨다. 커패시터에서 방전된 퓨즈에 흐르는 대전류는 I²t에 빠르게 도달시켜 수 ms내에 퓨즈를 용단시킨다. 제안하는 보호회로를 제작하고, 실험을 통해 성능을 검증하였다.

• Fire Science and Engineering
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• v.22 no.1
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• pp.24-28
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• 2008

This paper studied on the causal analysis of electrical fire by using fuse that it is used with safety device in electrical products. The experimental samples used are glass tube fuse(15 A, $5{\times}20mm$) and temperature fuse(10 A, $72^{\circ}C$). The experiment analyzed on the characteristics of damaged fuse by main causes(short circuit, overload, external flame) of electrical fire. The results showed, in case of glass tube fuse identified different characteristics in external form and element surface and element texture of damaged fuse by main causes of electrical fire. In case of temperature fuse identified different characteristics in external form and sliding contact surface and sliding contact texture of damaged fuse only by external flame.

• Journal of the Institute of Electronics and Information Engineers
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• v.54 no.3
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• pp.131-137
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• 2017

In order to safely protect high over current flowing into the main circuit at short-circuit without any explosion or fire, the enclosed cartridge fuse with a high interrupting capacity should be applied. But this fuse is impossible to be applied to an inner electronic circuit because of a limited space problem result from the miniaturization trend of products. Therefore, it is necessary to apply a sub-miniature fuse with a relatively small size. However the semi-enclosed fuse which is more free for an influx of air than the enclosed cartridge fuse and is possible to protect fuse elements with chemical and physical combination can be adoptable. But it has a limit of implementing the characteristic of a high breaking capacity. For these reasons, the Fe-42wt％Ni fuse elements alloy and fuse-link with less space were designed to increase a breaking capacity of sub-miniature fuse and its safety for fire and explosion was confirmed in this paper.

• Fire Science and Engineering
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• v.24 no.2
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• pp.38-43
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• 2010

The purpose of this study is to secure the basis for judgment on the cause of an accident by analyzing the melting characteristics of a blade type fuse used for vehicles due to overload. In order to increase the reliability of the test, it was conducted by connecting the electrical system with conditions similar to those of an actual vehicle to apply the load. Carbonization pattern experiment of fuse by outside flame applied Korean Standard (KS). The fuse melted by the overcurrent showed a smooth cross-section while the test terminals, clear plastic body, etc., burnt out by the external flame was badly deformed. When 185% of the rated current (27.8A) was applied to a cable of 15A rated current onto which an over-capacity fuse (20A) was installed, the fuse melting time was 217 seconds. In addition, when a load current of 28.8[A] (139%) was applied, the fuse's test terminal and terminal blade were not burnt out although foam was observed on some parts of the plastic body. When a load capacity of 28.2[A] (141%) was applied to a cable of 15A rated current onto which an over-capacity fuse (30A) was installed, the fuse melting time was approximately 10 seconds. When a load current of 35.8[A] (119%) was applied, the fuse's test terminal and terminal blade were not burnt out, although some parts of the plastic body was swelled. However, it was observed that the switch terminal melted if approximately six minutes lapsed under such conditions. When a load capacity of 39.4[A] (131%) was applied to a cable of 15A rated current onto which an over-capacity fuse (30A) was installed, the fuse melted in approximately 69 seconds, and the test terminal and terminal blade were not burnt.

• Magazine of the Korea Institute for Structural Maintenance and Inspection
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• v.18 no.4
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• pp.77-82
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• 2014

본 기사는 교량의 이음부(joint) 설계를 위한 새로운 구조적 퓨즈 개념을 다루고 있다. 제안하는 개념은 경제성, 명확한 하중경로, 그리고 지진 후 보수의 용이성 등을 포함한 여러 가지 장점을 가지고 있다. 기본적인 아이디어는 평상시의 사용 상태에서는 탄성거동을 할 수 있을 정도로 강하지만 동시에 주요 지진이 발생하였을 때는 파괴될 수 있을 정도로 약한 구조적 퓨즈를 설계하여 지진에너지가 퓨즈를 통과하지 못하도록 하겠다는 것이다. 두 가지의 대표적인 프로젝트를 소개하여 구조적 퓨즈의 개념이 실무에 어떻게 성공적으로 적용될 수 있었는지 보이고자 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.6
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• pp.3827-3831
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• 2014

This paper aims to solve the problem deterioration of power fuses. The deterioration of a power fuse is a cause of failure misoperation by a normal current flowing reduplicatively to fuse the element. An extension survey of a load feature rerating power fuse examined the power fuse deterioration removal, the cause of the deterioration of the power fuse, the front-after, and the thermal variation of the inside transformer room electric power equipment. The transformer showed an average improvement of $6[^{\circ}C]$. The temperature of the electrical line showed $7{\sim}8[^{\circ}C]$ improvement. The static condenser and direct reactor was $2{\sim}3[^{\circ}C]$ high-state maintenance the temperature and equipment syntonization relationship. In the subject of study $0.5{\sim}1.0[^{\circ}C]$ stabilizing three phase power fuse temperature differential was. Suggestion in the transformer room environment power equipment between the cause temperature happen elimination to deterioration of power fuse and temperature rise control.

• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.973-974
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• 2007

최근 전기용품 안전기준(이하 K 기준)의 국제규격(이하 IEC 규격) 부합화에 따라 온도퓨즈(thermal-links)에 대한 노화시험(ageing test)이 중요한 성능평가항목으로 부각되고 있다. 특히, 50일 이상 소요되는 온도퓨즈의 노화시험을 하기 위해서는 규격에 적합한 온도상승률을 가지고, 용단시간 및 용단온도를 정확하게 측정할 수 있는 시스템이 구축되어야 하므로, 그 성능평가설비 또한 매우 중요하다고 할 수 있다. 본 논문에서는 온도퓨즈의 K 기준 및 IEC 규격을 분석하여 노화시험항목을 고찰하였으며, 온도퓨즈 노화시험설비 자동화시스템을 개발하여 국제적 수준의 성능평가기술 기반을 구축하였다. 이러한, 시험설비의 자동화시스템 개발은 성능평가기술을 향상시킬 뿐만 아니라 향후 시험기관의 국제적 위상 제고(提高)에 중요한 역할을 할 것으로 기대된다.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.11 no.6
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• pp.74-80
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• 1997

In this paper, we deal with the I -t characteristic of low voltage distribution fuse (line fuse). That fuse element has two parts;One is low temperature melting element(LTME) to put up with over current and the other is high temperature melting element (HTME) which put up with large current. Melting charateristic of fuse is determined by L TME and HTME. So we verified their properties of fuse design, mathematically, by simulating the thermal and electric characteristics of each other. We simulated the I-t characteristic of line fuse by using the numerical method;Finite Element Method(FEM). Then, we could acquire very similar result at the HTME and L TME area when compared the simlation result with experimental one.