Anodic to cathodic arc transition according to break arc lengthening

Jemaa, N. Ben; Morin, Léo; Benhenda, S.; Nedelec, L.

doi:10.1109/tcpma.1998.740053

Cited by 41 publications

(31 citation statements)

References 2 publications

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“…That can lead to the destruction of the device and cause fires for its direct environment. Beside this, when the natural extinction gap of the arc increases (because the arc is getting longer), the phenomena of transfer between contacts pass through the above mentioned anodic and cathodic regimes and thus, material loss is becoming increasingly large [7][8][9][10][11].…”

Section: What Are the Consequences Of An Increase In Current And / Ormentioning

confidence: 99%

New contact material for reduction of arc duration for dc application

Doublet¹,

Jemaa

Rivoirard

et al. 2010

Eur. Phys. J. Appl. Phys.

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:The phenomenon of arcing is the major cause of electrical contact degradation in electrical switches. Degradation involves contact erosion and/or welding. The use of special contact material and that of specific material processing may permit contact erosion to be reduced, in particular by shortening the arc duration. A short review of these approaches is presented in the first part of this paper. In the second part, the development of a new self-blowing contact material is described. This material has been tested under DC voltages from 14 V to 42 V. A reduction of the arc duration by a factor of 4 approximately was obtained as was a concomitant reduction of the extinction gap to less than 2 mm. This material will contribute to achieving better reliability in high current-high voltages breaking devices, and will aid in their miniaturization, e.g. in relays.

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Section: What Are the Consequences Of An Increase In Current And / Ormentioning

confidence: 99%

New contact material for reduction of arc duration for dc application

Doublet¹,

Jemaa

Rivoirard

et al. 2010

Eur. Phys. J. Appl. Phys.

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“…For an breaking speed of 20 cm/s, such arcs vary in length from 40-120 micrometers, thus the material transfer is mainly caused by the effects of the arc in its anodic phase [1], [14], [15]. For this type of arc to be produced, the distance between the electrodes must be less than several times the electrons mean free path (10-20 micrometers): during their passage from the cathode to the anode, the electrons undergo no collisions or only very few, thus the energy with which they strike the anode is practically equal to the energy acquired in the cathodic gain.…”

Section: A Resistive Loadmentioning

confidence: 99%

“…Tests in resistive load reveal the transfer performance of material under anodic arc, i.e., under short arc [1], [15]. According that during bounce at make, arc length equal to bounce height remains short ( m), it is expected that resistive tests also reveal the transfer performance of material under arc at bounce on make.…”

Section: A Resistive Loadmentioning

confidence: 99%

Contacts materials performances under break arc in automotive applications

Morin

Jemaa

Jeannot³

et al. 2000

IEEE Trans. Comp. Packag. Technol.

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New materials for electrical contacts have been developed recently, based on AgFeOx, AgFeRe, AgZnO, and doped AgSnO 2 . The work described here aims at evaluating the material transfer characteristics, and the contact resistance behavior, of these materials under break arc in automotive applications (14 V dc, 30-40 A). A comparison is made between these new materials and four reference materials: Ag, AgCdO, AgSnO 2 , and AgNi.Four of the new materials appear very promising: AgZnO, AgFeOx, doped AgSnO 2 io 6, and EMB8. These combine the good transfer performance of AgCdO in inductive load, i.e., in long cathodic arc, with that of AgSnO 2 in resistive load, i.e., in short anodic arc. For all materials, contact resistance is much higher in inductive load (7 m) than in resistive load (1 m). An explanation of the different behaviors of these materials is attempted by means of metallographic analysis.

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“…Welding of the contacts can occur [2] and has been shown to occur at the beginning of separating the contacts under an arc [3]. The arc also causes contact erosion and transfer of material [4] leading to degradation of the system.…”

Section: Introductionmentioning

confidence: 99%

Micro-Arcing and Arc Erosion Minimization Using a DC Hybrid Switching Device

Swingler

McBride

2008

IEEE Trans. Comp. Packag. Technol.

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Abstract-Hybrid switching devices utilize the advantages of both conventional electrical contacts and solid state electronics to minimize arcing during opening and closing operations. This can result in higher reliability and reduces the need for high cost specialist contact materials. The hybrid switch does not eliminate arcing completely, due to the inductive nature of circuits; micro-arcing is known to occur.An experimental dc hybrid switching device is introduced which minimizes arcing for 42 V applications. The characteristics of micro-arcing are investigated to determine the factors which influence the duration of micro-arcs. Surface profiling techniques are used to determine low level contact erosion. The magnitude of contact erosion is related to the micro-arcing.

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Anodic to cathodic arc transition according to break arc lengthening

Cited by 41 publications

References 2 publications

New contact material for reduction of arc duration for dc application

New contact material for reduction of arc duration for dc application

Contacts materials performances under break arc in automotive applications

Micro-Arcing and Arc Erosion Minimization Using a DC Hybrid Switching Device

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