An SF/sub 6/ circuit breaker using the autoexpansion principle

Bernard, G.; Malkin, P.; Legros, W.

doi:10.1109/61.193979

Cited by 9 publications

(3 citation statements)

References 1 publication

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“…For practical reasons regarding the implementation of the diagnostic means, a model circuit breaker has been chosen. A SF 6 self-blast medium voltage model circuit breaker, based on a combination of thermal expansion and the arc rotation principle [1], was used (figure 1).…”

Section: Circuit Breaker Devicementioning

confidence: 99%

Study of the arc-electrode interaction in a SF₆self-blast circuit breaker

Chévrier

Fievet

Ciobanu

et al. 1999

J. Phys. D: Appl. Phys.

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To study the interaction between the electrode and the electrical arc in a SF6 self-blast circuit breaker, a coupling between experimental and theoretical approaches is proposed. The experimental approach allows physical variables such as the temperature just below the contact surface and the total metallic vapour mass in the electrical arc to be measured. The theoretical study is based on a hydrodynamic model for electrical arc modelling, which takes into account Joule heating, radiation and real-gas effects. The arc/electrode interaction model is built on an energy balance at the boundary between the gas flow (the arc) and the electrode (cathode or anode). The validation is obtained through comparisons between measured and calculated results.

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Section: Circuit Breaker Devicementioning

confidence: 99%

Study of the arc-electrode interaction in a SF₆self-blast circuit breaker

Chévrier

Fievet

Ciobanu

et al. 1999

J. Phys. D: Appl. Phys.

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“…A SF 6 self-blast medium-voltage circuit breaker, based on the combination of thermal expansion and the arc-rotation principle [14] was used. Circuit-breakers of this type presented in figure 7, use a combination of the rotary arc and the pressure rise inside the expansion volume.…”

Section: The Switching Principlementioning

confidence: 99%

Industrial applications of high-, medium- and low-voltage arc modelling

Chévrier¹,

Barrault²,

Fievet³

et al. 1997

J. Phys. D: Appl. Phys.

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A hydrodynamic model for electrical arc modelling, which takes into account Joule heating, radiation, Lorentz forces, arc - wall interactions and real-gas effects, was applied to study high-, medium- and low-voltage circuit breakers. The first industrial application deals with a high-voltage puffer circuit breaker. Ablation of the nozzle material in this kind of circuit breaker has been studied with the model. The second industrial application presents an self-blast medium-voltage circuit breaker, based on the combination of thermal expansion and the arc-rotation principle. The temperature between the contacts just after the current zero has been evaluated experimentally and numerically. The comparison between these results is discussed. Lastly, the arc commutation in a low-voltage circuit breaker has been simulated. The results show that, in this type of experimental set-up, the interaction among the electrical arc, the flow and the Lorentz force is preponderant.

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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%

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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An SF/sub 6/ circuit breaker using the autoexpansion principle

Cited by 9 publications

References 1 publication

Study of the arc-electrode interaction in a SF₆self-blast circuit breaker

Study of the arc-electrode interaction in a SF₆self-blast circuit breaker

Industrial applications of high-, medium- and low-voltage arc modelling

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

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An SF/sub 6/ circuit breaker using the autoexpansion principle

Cited by 9 publications

References 1 publication

Study of the arc-electrode interaction in a SF6self-blast circuit breaker

Study of the arc-electrode interaction in a SF6self-blast circuit breaker

Industrial applications of high-, medium- and low-voltage arc modelling

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

Contact Info

Product

Resources

About

Study of the arc-electrode interaction in a SF₆self-blast circuit breaker

Study of the arc-electrode interaction in a SF₆self-blast circuit breaker

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