• 대한전기학회:학술대회논문집
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• 대한전기학회 1993년도 정기총회 및 추계학술대회 논문집 학회본부
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• pp.249-252
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• 1993

On Concerning to the Bushing for the High Voltage Transformer and GCB & GIS which we have imported of all type owing to the insufficiency of internal production facilities and the want of technology, our research team succeeded in the development of the 72.5kV/1200A Gas Bushing for GCB & GIS. We carried out the dimensions & visual tests and the mechanical & electrical tests, and we have got the favorable test-results.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 A
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• pp.55-56
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• 1994

KEPCO is now driving forward the raising of transmission-line-voltage from 345kV to 765kV for the stabilization of network and as the counter measure of the rapid-increasing of domestic electric power demands. 800kV GIS is one of the most important apparatuses in the 765kV substation and we are developing the Model $SF_6$ GCB for the GIS now. We'll explain the present condition of development of 800kV $SF_6$ GCB until now.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 A
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• pp.214-215
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• 1994

The VCB(Vacuum Circuit Breaker), which has been used in power distribution system, have prevented the performance of the phase modifying equipment (Condenser Bank and Shunt Reactor) and the important parts in the electric power system because of the transient voltage in opening and closing circuit. So, we developed the 25.8kV $SF_6$ gas GCB(GAS Circuit Breaker), which had the few occurance of the surge in opening & closing circuit and had the high reliability, based in our own technology.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 C
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• pp.1385-1387
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• 1994

For the development of the 25.8kV outdoor GCB (Gas - Circuit - Breaker), which have a surge surpression performance in closing & opening of circuit and a high reliability performance, we have developed the 25.8kV gas bushing first of all in KOREA. After manufacturing of 25.8kV/2000A gas bushing, we carried out the dimension & visual test and electrical & mechanical test and we have got the favorable test-results. And it was put together real outdoor GCB, and then we carried out type test at KERI and have confirmed the performance of this bushing.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.104-108
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• 1997

The puffer type GCB(gas circuit breaker) has been widely used in modern transmission power system. Understanding the motion of cold $SF_6$ gas flow is essential for the better design of those GCB's. For this purpose, a program using the so-called FLIC(Fluid-In-Cell) method has been developed and applied to a puffer type GCB. The calculated results are compared with those from the measurement and the computation by commercial CFD (Computational Fluid Dynamics) package 'RAMPANT' and show fairly good agreement.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 A
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• pp.366-368
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• 1999

In this paper, the analysis of the gas flow in the GCB is presented by using the modified FLIC method and the arc model. The modified FLIC method has two step calculation procedure. And it adopts the upwind scheme, which results in the stability.[1] The arc model used in this paper makes arc a heating source in the energy equation. The heating source is composed of ohmic heating and radiation energy transfer. And the type of the GCB in this paper is a auto-expansion type.[2]

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 B
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• pp.603-605
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• 1995

This paper introduces aspects of electrical power system with regard to the application of generator circuit breaker(GCB) in nuclear power generating stations. Technical analyses are performed for the two(2) alternatives, one(1) stand-by auxiliary transformer(SAT) vs two(2) SAT's, on system configuration in case that one(1) GCB is used. The results show that one(1) SAT system may not be justified when larger auxiliary loads are required to increase plant availibility. This paper also presents the feasibility on reliability, operability and maintainability for adopting GCB.

• 약학회지
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• 제36권2호
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• pp.120-125
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• 1992

Ths sorption and desorption properties of four different solid adsorbents were evaluated for the trace enrichment of diphenylhydantoin from biological samples. Graphitized carbon black(GCB) gave the highest adsorption coefficient. And among the organic solvents examined, methanol gave the highest desorption coefficient. Using the GCB column, the optimum elution volume of the eluting solvent was evaluated from the breakthrough curve of diphenylhydantoin. The usefulness of GCB as the solid adsorbent was examined for the solid-phase extraction of diphenylhydantoin from serum in the concentration range of $20-50\;{\mu}g/ml$.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제54권9호
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• pp.408-413
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• 2005

This paper presents the basic design technology on the hybrid type GCB(gas circuit breakers) through the test results. The three type hybrid interrupters according to the arrangement of the thermal expansion chamber and the puffer cylinder(they are called 'serial type', ' parallel/exchanged type ,' and ' parallel/separated type ' respectively in this work) were designed and manufactured and then the tests of operating characteristics and interrupting were performed using a simplified synthetic test facility. The interruption capability with the type and the opening speed and the pressure rise which is required to interrupt were examined. The change of pressure rise with the number of interruption was given quantitatively and therefore the pressure rise can be predicted. Finally, it was shown that the interruption capability tends to increase with the increasing of opening speed in the puffer type; however, the hybrid type interrupter has a different interruption characteristic.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.766-767
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• 2007

현재 국내 원자력 발전소내의 노후화된 GCB 차단기를 VCB로 교체할 경우, 관련한 기술적 규정들이 확립되지 않아, 이에 대한 기술적 평가가 요구되었다. 본 연구에서는 원자력 발전소 주요 전동기의 기동 및 차단시에 발생하는 개폐서지를 측정하여 발생된 서지의 크기를 분석하고 EMTP 시뮬레이션 방법을 통하여 교체 시 기술 기준을 제안하고 적정성을 검증하였다.