• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• v.11B no.4
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• pp.121-128
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• 2001

Numerical schemes for the simulation of the cold gas flow in the SF6 puffer type circuit breaker is presented. The governing equation is axisymmetric compressible Euler Equation and FVM is used to analyze the behavior of flow. The upwind scheme is used to avoid numerical instability and MUSCL is used to obtain high order accuracy. For the efficient calculation, AF-ADI scheme is used. The simulation result shows good agreement with the experimental data.

• Proceedings of the KSME Conference
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• 2003.04a
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• pp.729-733
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• 2003

Hybrid RMU is a kind of power circuit breaker and protects electric devices from over-current. In this paper we built a dynamic model of RMU driving mechanism using ADAMS and performed a optimal design of several design parameters. Finally we developed a prototype of RMU driving mechanism through results of analysis and confirmed it to satisfy design requisitions.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.601-602
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• 2015

Interruption of AC is easier due to natural occuring of zero crossings. In DC, zero crossings is achieved by Forced commutation technique. In this paper an alternative counter voltage(ACV) DC Hybrid Circuit breaker(DC-HCB) is modeled using EMTP/ATP tool, Results show that, ACV DC-HCB can interrupt DC with in 5ms with a source voltage of upto 1 KV.

• Proceedings of the KIEE Conference
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• 2002.04a
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• pp.18-20
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• 2002

In this paper, various forces generated in the Gas Circuit Breaker(GCB) such as operating force, repulsive force, spring force, and dashpot force are analyzed with the fluid properties and the mechanical structure. The operation of GCB can be understood. A stroke curve from the result of simulation is compared with experimental one.

• Proceedings of the KIEE Conference
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• 1988.07a
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• pp.69-72
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• 1988

The work is concerned with the analysis of the voltage escalation caused by the repeated restriking and extinguishing of the current when the vacuum circuit breaker interrupts the arc furnace load current. The paper particularly concentrates on the protective measures that may be adopted to overcome the restriking problem and guidelines are evaluated.

• Proceedings of the KIEE Conference
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• 2001.07a
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• pp.371-373
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• 2001

Main functions of Generator Circuit Breaker(GCB) is cut the generator off from the main transformers and the aux. transformers when plant trip or startup. In this paper, the design requirements For GCB of nuclear power plant is examined. NRC presented the area of review, acceptance criteria and review procedures of GCB in the SRP(Standard Review Plan). In Korea, APR1400 adapted the GCB in main power system.

• 전기의세계
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• v.29 no.6
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• pp.401-409
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• 1980

This paper deals with the implementation of forced reclosing the transmission line. Because the ground circuit breaker method decrease the secondary arc current sufficiently, the reclosing time can be reduced. As the secondary arc current is large and its residual time is long in UHV transmission line, this method is more effective in that system. The resistance of ground circuit breaker which minimize the secondary arc current is determined according to the system voltage and the length of transmission line.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2006.05a
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• pp.99-102
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• 2006

We developed the electronic ballast for the street HID lames with the leakage current detection and circuit breaker function. By detecting the leakage current and breaking the system we are protected from the electric shock and the ballast is safe from the electric damage at the time of the continuous reignition state.

• JOURNAL OF ELECTRICAL WORLD
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• no.5 s.125
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• pp.40-47
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• 1987

• JOURNAL OF ELECTRICAL WORLD
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• no.5 s.125
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• pp.12-17
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• 1987