Development of a magnet-assisted autopuffer GCB

Sasao, H.; Hamano, S.; Wada, Y.; Hasegawa, Hiroshi; Kobayashi, Noboru

doi:10.1109/61.57977

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…7 yield the following approximate empirical relationship: (1) where the parameters , , and are the magnetic field strength, the arc chamber diameter, and the peak current, respectively;…”

Section: B Empirical Modelingmentioning

confidence: 99%

“…S OME high-voltage interrupters utilize a combination of electromagnetic fields and polytetrafluoroethylene (PTFE) nozzles in order to provide a suitable arc-quenching environment [1], [2]. The physical conditions occurring within such an environment have been investigated by many researchers [1]- [5] and are shown to be complex and only partly understood.…”

Section: Introductionmentioning

confidence: 99%

“…The physical conditions occurring within such an environment have been investigated by many researchers [1]- [5] and are shown to be complex and only partly understood. This contribution describes some experiments conducted on high-current, electromagnetically rotated electric arcs within such an environment.…”

Section: Introductionmentioning

confidence: 99%

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Diagnostic Measurements on Rotary Arcs in Hollow Polymeric Cylinders

Mori

Spencer

Humphries

et al. 2005

IEEE Trans. Power Delivery

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Rotary arcs in hollow polymeric cylinders have been monitored using electrical and optical techniques. The arcs burning within hollow cylinders were driven by electromagnetic forces. The arc voltage, current, dielectric strength below the arc gap, the optical emissions from the chamber were measured along with high-speed photography. The diameters of the hollow cylinders and magnitude of the applied magnetic field were varied. The arc voltage, especially the extinction peak prior to current zero, increased for larger bore cylinders and higher magnetic fields. By comparing the arc voltage waveforms and arc photographs, this was shown to be because the arcs were elongated. Luminosity was detected even after current zero, when polytetrafluoroethylene was in the arc chamber. The extensive experimental results obtained have enabled empirical mathematical expressions to be derived which yield approximate indications of current interruption capabilities under different operating conditions.

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“…7 yield the following approximate empirical relationship: (1) where the parameters , , and are the magnetic field strength, the arc chamber diameter, and the peak current, respectively;…”

Section: B Empirical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Diagnostic Measurements on Rotary Arcs in Hollow Polymeric Cylinders

Mori

Spencer

Humphries

et al. 2005

IEEE Trans. Power Delivery

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“…An externally applied magnetic field is introduced to enhance the interrupting performance at low current interruption. Figure illustrates the principle of the gas circuit breaker utilizing the magnetic field. An arc is exposed to an externally applied magnetic field generated by a permanent magnet or a magnet coil.…”

Section: Introductionmentioning

confidence: 99%

“…Sasao et al . showed that the rotation of the arc column under an externally applied magnetic field is experimentally observed only in a low arc current range and that a local potential gradient of the arc is larger than that in the case without a magnet where the arc rotates. The low arc current period before the current zero point is obviously significant for the interruption of fault current.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of arc in SF₆ gas circuit breaker with externally applied magnetic field

Hirayama

Fujino

Ishikawa

et al. 2016

IEEJ Transactions Elec Engng

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The influence of an externally applied magnetic field on the characteristics and the transient behavior of the arc in a gas circuit breaker is examined by means of three-dimensional time-dependent numerical simulations. It is assumed that the gas circuit breaker has a ring-shaped permanent magnet and an arc is exposed to the externally applied magnetic field. Numerical results demonstrate that the rotation of arc induced by the Lorentz force produces a three-dimensional spiral structure of the arc. As a consequence of the rotation, the arc shrinks and the arc temperature decreases remarkably just before the time when the arc current is zero, so that applying the magnetic field increases the arc voltage. The numerical results also show that a swirling flow generated by the Lorentz force carries a thermal energy toward the thermal puffer room mainly by the convection during the high arc current phase, and as a result the pressure in the thermal puffer room increases.

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Current chopping phenomena in SF₆ selfblast circuit breakers

Voigt

1993

Int Trans Elec Energy Syst

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In SF6 selfblast circuit breakers the arc energy provides a current dependent pressure rise in the upstream volume. For successful interruptions for smaller currents a current independent gas flow is necessary. The gas flow can cause current chopping when small inductive currents are interrupted. In the present paper chopping phenomena are investigated experimentally. Arc time constants are determined by current step experiments. A two‐pole arc model is used for the simulation of the observed phenomena.

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Development of a magnet-assisted autopuffer GCB

Cited by 9 publications

References 6 publications

Diagnostic Measurements on Rotary Arcs in Hollow Polymeric Cylinders

Diagnostic Measurements on Rotary Arcs in Hollow Polymeric Cylinders

Numerical study of arc in SF₆ gas circuit breaker with externally applied magnetic field

Current chopping phenomena in SF₆ selfblast circuit breakers

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Development of a magnet-assisted autopuffer GCB

Cited by 9 publications

References 6 publications

Diagnostic Measurements on Rotary Arcs in Hollow Polymeric Cylinders

Diagnostic Measurements on Rotary Arcs in Hollow Polymeric Cylinders

Numerical study of arc in SF6 gas circuit breaker with externally applied magnetic field

Current chopping phenomena in SF6 selfblast circuit breakers

Contact Info

Product

Resources

About

Numerical study of arc in SF₆ gas circuit breaker with externally applied magnetic field

Current chopping phenomena in SF₆ selfblast circuit breakers