Arcing voltage of the metal vapour vacuum arc

Agarwal, Mayur; Holmes, Robert W.

doi:10.1088/0022-3727/17/4/014

Cited by 63 publications

(19 citation statements)

References 18 publications

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“…It yields to 18 V for copper cables, and 19 V for aluminum cables in the case of DC current as shown in figure 3. The accuracy of these values is rather low but they correspond quite well to values found in literature [2,3]. Similar measurements were performed in AC for the three tested currents, but the method is less accurate due to the more unstable behavior of the arc, the orientation of the plasma plume changing every half period.…”

supporting

confidence: 86%

Arc tracking energy balance for copper and aluminum aeronautic cables

André

Valensi

Teulet

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. Arc tracking tests have been carried out between two voluntarily damaged aeronautic cables. Copper or aluminum conductors have been exposed to short circuits under alternating current. Various data have been recorded (arc voltage and current, radiated power and ablated mass), enabling to determine a power balance, in which every contribution is estimated. The total power is mainly transferred to the cables (between 50 and 65%, depending on the current and the cable type), and causes the melting and partial vaporization of the metallic core and insulating material, or is conducted or radiated. The other part is deposited into the arc column, being either radiated, convected or conducted.

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supporting

confidence: 86%

Arc tracking energy balance for copper and aluminum aeronautic cables

André

Valensi

Teulet

et al. 2017

J. Phys.: Conf. Ser.

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“…Agarwal and Holmes [6] measured arc voltages for seven metals (Cu, Al, Mg, Sn, Zn, Cd, and Bi) as a function of the axial magnetic field for several arc currents greater than 200 A. It appeared that, at low currents smaller than 1 kA, the arc voltage increased monotonically with increasing axial magnetic field for every metals investigated.…”

Section: B In Axial Magnetic Fieldmentioning

confidence: 99%

Effect of Axially Symmetric Magnetic Fields for Dynamics of Low-Current DC Vacuum Arc Plasma

Tsuruta

Yanagi

Shibata

et al. 2007

IEEE Trans. Plasma Sci.

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In this paper, effects of four types of axially symmetric magnetic fields on the dynamics of low-current dc vacuum arc plasma, which is less than 30 A, were examined. Arcs were ignited by the opening of the butt contacts made of zinc. In the axial magnetic field, the arc plasma was restricted within a column, and the arc voltage rose with increasing gap length. When a magnet was arranged behind the cathode, the cathode spot rotated in the opposite direction to the Lorentz force (−J × B) on the edge of the circular-rod cathode. On the other hand, when a magnet was arranged behind the anode, the arc plasma was constricted on the anode side, and the lifetimes of the arcs became longer, although the arc voltage rose with increasing gap length. The compression effect of the axial component of the magnetic field was analyzed by introducing a simple magnetic piston model, and the experimental diameters of the arc column showed a good agreement with the model. Index Terms-Arc voltage, axial magnetic field, axially symmetric transverse magnetic field, Lorentz force, low-current dc vacuum arc, retrograde motion of cathode spot.

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“…[1][2][3][4][5][6][7] Cathode spots ͑an ensemble of a hot surface zone with maximum luminosity and a dense plasma cloud 8 ͒ constitute the attachment points of the arc on cathodes. Efforts to understand arc root attachment and movement on the cathode have been extensive.…”

mentioning

confidence: 99%