• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 추계학술대회
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• pp.84-87
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• 2010

본 논문에서는 power management IC에 사용되는 아날로그 트리밍용 antifuse OTP 셀을 제작하였다. VPP (=7V)와 VNN (=-5V)의 Dual program voltage를 이용하는 antifuse OTP 셀은 antifuse 양단에 hard breakdown 이상의 전압을 인가하여 thin gate oxide를 breakdown시킨다. $0.18{\mu}m$ BCD 공정을 이용하여 제작된 antifuse OTP 셀의 면적은 $48.01{\mu}m^2$으로 eFuse OTP 셀 면적의 44.6% 수준이다. 20개의 테스트 패턴을 측정한 결과 프로그램 후 antifuse의 저항은 수 $k{\Omega}$ 이하로 양호하게 측정되었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1998년도 추계학술대회 논문집
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• pp.249-254
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• 1998

This paper describes the control methods to cut out the NFB(No Fuse Breaker) of shorted load in the auxiliary power supply, Generally, when the short-circuit occurs in the load of the auxiliary power supply, the auxiliary power supply stops the operation according to the protection sequence. Finally, the other auxiliary power supply stops the operation by the same fault, To resolve this problem, we suggest the control method to trip the NFB of shorted load. That is, when the short circuit occurs, the controller changes control mode from voltage mode to current mode without the operation of output contactor(SIVK) in the auxiliary power supply. The auxiliary power supply provides a large current for the short-circuit load. After some time, the NFB of the short-circuit load is cut off and the auxiliary power supply Provides stable voltage for the loads except for the short-circuit load.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.540-542
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• 2003

In the high-power tests to be performed on electrical apparatus as circuit-breaker, load switch, fuse, transformers, insulators, cable and so on, the results of tests on these apparatus are extremely important to evaluate the performance of test object. The reliability of the results depends on the reliability of measuring systems used in the laboratories where tests are performed. This paper deals with factors of uncertainty and describes estimation of uncertainty in new measuring system used in high-power testing LAB. 1 in KERI.

• 대한전기학회논문지:전력기술부문A
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• 제49권4호
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• pp.143-151
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• 2000

Electric power distribution feeders are susceptible to faults caused by a variety of situations such as adverse weather conditions, tree contacts, equipment failure, accidents, etc. Distribution circuit faults result in a number of problems related to the reliability of service and customer power quality. In the distribution line, the permanent interruption of customer service resulting from a blown fuse or a recloser lockout was the only factor which was used to determine service reliability. On underground distribution line, the serving of cables by earth-moving equipment is a prevalent cause of faults and the most cable faults quickly develop into bolted current. we introduce th multi-circuit breaker coordination methods in the Underground Distribution Line.

• International Journal of Aerospace System Engineering
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• 제9권2호
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• pp.1-9
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• 2022

The NEA release mechanism is used to provide restraint and release functions with low shock for critical deployment operations on solar arrays after launch. The GK3 solar array consists of 2 wings and 6 hold down points per panel. The NEA SSD9103S1 is a part of the GK3 solar array hold-down and release mechanism. Each NEA unit is equipped with two Z-diodes which provide power to a NEA unit connected in series after actuation of the fuse wire. This paper presents the hot firing test results of a quadrature NEA SSD9103S1 configuration. One output powers a maximum of 4 NEA SSD9103S1 units simultaneously. The necessary actuation pulse duration has been determined to meet margin requirement for thermal energy of minimum 4. Actuation thermal energy difference is about 6.6% between each half of two fired serial NEAs. Thermal energy margin at worst case is minimum 5.9 in case of an actuation pulse duration of 500 ms. Two series Zener impedance depend on current applied has been characterized by an additional actuation after all fuse wires are open circuit. Total number of actuation commands to the GK3 NEA unit reduce drastically from 24 in case of single NEA configuration down to 8 in case of parallel and quadrature NEA configurations. It can be accommodated by the existing HP2U Pyro design without any impact.

• Progress in Superconductivity
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• 제11권1호
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• pp.19-24
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• 2009

Among the various types of fault current limiters, superconducting fault current limiters could be the most preferable choice for high voltage electric power systems owing to the remarkable current limiting characteristics of superconductors. But, there have been no commercial superconducting fault current limiters which were installed into actual electric power systems until these days due to some remained technical and economical problems. Thus, in order to promote the development and application of the superconducting fault current limiters into real field, it is essential to understand the power utilities’ requirements for their networks and also suitable test method and some specifications should be prepared. This paper focuses on the matters of test requirements and standardization issues that should be prepared for commercialization of superconducting fault current limiters. The unique current limiting characteristics of superconducting fault current limiters were investigated and related other standards including circuit breakers, transformers, reactors, power fuse, and fused circuit breakers were compared to setup the basis of novel specification of superconducting fault current limiters. Furthermore, required essential test procedures for superconducting fault current limiters were suggested.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 하계학술대회 논문집 A
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• pp.537-539
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• 2003

퓨즈 부착 고압 교류부하개폐기(Alternating current switch-fuse combination)는 개폐기와 한류형 퓨즈의 조합으로서 각각의 규격(개폐기는 IEC60265-1, 한류형 퓨즈는 IEC60282-1)에 따른 개발시험을 실시 한 후 휴즈부착 고압교류 부하개폐기의 규격인 IEC62271-105에 따라 개발시험이 이루어진다. 본 논문에서는 최근에 개정된 IEC62271-105의 신구 비교, 시험종류 및 시험방법에 대해서 기술하였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2020년도 전력전자학술대회
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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.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 C
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• pp.964-966
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• 1998

The TC curve of recloser which used in KEPCO's distribution line is a little different in a pattern with the TC curve of sub-station OCR. So it sometimes fails in protection coordination. And the recloser sometimes does mis-open/close owing to the inrush current of CB reclosing when a fault occurred on the source-side of the recloser. The mis-open/close is another trouble maker. This Paper Present a new delay TC curve of recloser which has the same pattern with the TC curve of OCR, and a new instantaneous TC curve of recloser which doesn't mal-function to the inrush current. In addition, this paper present another two TC curves for the serial positioning of 2 reclosers. So we accomplished the simple protection coordination of OCR-recloser-fuse.

• 한국위성정보통신학회논문지
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• 제1권2호
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• pp.95-100
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• 2006

통신해양기상위성의 전력계는 향상된 Eurostar 3000 버전에 바탕을 두고 있다. Eurostar 3000 전력계는 정상상태 또는 하나의 결함에서도 자율적으로 동작하며 높은 수준의 재구성 능력 및 유연성을 제공한다. 본 논문에서는 통신해양기상위성 전력계 예비설계 결과를 소개한다. 통신해양기상위성 전력계는 하나의 배터리, 태양전지어레이 윙, 전력공급기, 파이로 유닛 및 태양전지어레이 구동기 그리고 릴레이 및 퓨즈 브래킷 들로 구성된다. 통신해양기상위성 전력계는 3 kW의 버스 전력을 제공할 수 있다. 태양전지어레이는 2개의 태양전지판으로 구성된 전개할 수 있는 윙으로 구성된다. 태양전지는 GaAs/Ge 3중 접합 셀로 선정되었다. Li-ion 배터리는 10개의 직렬 연결된 셀 모듈로 구성되며 각 모듈은 셀 5개가 병렬로 연결된다. 전력공급기는 태양전지어레이 및 배터리와 함께 50 V로 완전 정류된 하나의 전력 버스를 생성한다. 전력 버스는 릴레이 및 퓨즈 브래킷 들에 의해 중앙 집중되어 보호되고 분배된다. 파이로 유닛은 점화 작동기 장치로 전력을 공급한다. 태양전지어레이는 자세제어계의 제어로 태양전지어레이 구동기에 의해 회전된다. 전력계의 제어 및 감시는, 특히 배터리, 전력공급기와 탑재 소프트웨어의 결합으로 수행된다.