SLF Interruption by a Gas Circuit Breaker without Puffer Action

Ushio,; Tominaga,; Kuwahara,; Miyamoto,; Ueda,; Sasao,

doi:10.1109/mper.1981.5511772

Cited by 2 publications

(4 citation statements)

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“…Ushio et al . demonstrated that a model gas circuit breaker designed to increase the pressure without any mechanical piston interrupted the current up to 63 kA under the breaker terminal fault condition and 36 kA under the short line fault condition. It is, however, noted that the model gas circuit breaker shows insufficient performance for a low current interruption due to the low thermal energy of the arc.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

“…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%

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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“…It has also been shown that the gas circuit breaker (GCB) applying this extinguishing scheme has a sufficient interrupting capability in the large interrupting current region [2,3]. It is well known that when the interrupting current of the arc increases, the current density of the arc exceeds a constant value inside the nozzle, and the clogging phenomenon will m r [l].…”

Section: Introductionmentioning

confidence: 99%

“…In this scheme, no mechanical compression devices (such as puffer piston) are required. It has also been shown that the gas circuit breaker (GCB) applying this extinguishing scheme has a sufficient interrupting capability in the large interrupting current region [2,3].…”

Section: Introductionmentioning

confidence: 99%

Investigation of a new extinguishing principle for a gas circuit breaker

Hamano

Sasao

Wada

et al. 1992

Electrical Engineering Japan

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A self--extinguishing principle of a gas circuit breaker (GCB) without puffer action (autopuffer GCB) using an external magnetic field was investigated to improve the interrupting capability in the small current region (several kA). Properties of the rotating speed of an arc, the arc voltage, and the gas pressure rise in an expansion space under the external magnetic field were studied experimentally. The relation between the interrupting capability and the radial magnetic flux density in the autopuffer GCB with a permanent magnet (magnetassisted autopuffer GCB) was obtained experimentally and also analyzed numerically. The results are summarized as follows.(1) The arc column is driven in the azimuthal direction by the radial component of the external magnetic field.(2) The rotating speed of the arc driven by the radial magnetic field of a permanent magnet remains constant in the arc current range below several kA, and it decreases with an increasing current in the current above several kA. '(3)Since the arc rotation raises the arc voltage and gas pressure in the expansion space, the gas flow from the expansion space to the arc increases in the vicinity of current zero. The interrupting capability is then improved in the small current region.(4) It is confirmed that the magnet-assisted autopuffer GCB has a good interrupting capability not only for the large current region but also far the small current region.

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SLF Interruption by a Gas Circuit Breaker without Puffer Action

Cited by 2 publications

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

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

Investigation of a new extinguishing principle for a gas circuit breaker

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SLF Interruption by a Gas Circuit Breaker without Puffer Action

Cited by 2 publications

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

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

Investigation of a new extinguishing principle for a gas circuit breaker

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

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