Arc root mobility during contact opening at high current

McBride, J.W.; Weaver, P.M.; Jeffery, P.A.

doi:10.1109/95.679034

Cited by 28 publications

(11 citation statements)

References 9 publications

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“…5) We can note that the scattering of the extinction gap values increases all the more the current intensity increases. That may be explained by the fact that for high intensity, each arc modifies strongly the electrode surface and then increases the arc root mobility as it has been observed in [7]- [9].…”

Section: B Arc Duration and Extinction Gap Versus Arc Intensity For mentioning

confidence: 94%

High-Intensity Contact Opening Under 36-V DC Voltage Application for Mild Hybrid Vehicles

Klonowski

Andlauer

Leblanc

et al. 2007

IEEE Trans. Veh. Technol.

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This paper concerns the study of contact opening under dc voltage in the case of high-intensity current (a few hundred amperes). The application fields are mainly automotive and aeronautical systems. An experimental device has been designed in order to study the opening of contacts under various conditions. The influence of several parameters on contact opening is studied. These are the following: the opening velocity, the current intensity through the closed contact, the nature of the contact materials (Ag, Ag-12wt%SnO 2 ), the value of the inductance in the electrical circuit. The measured parameters characterizing the opening phase are as follows: the arc duration, the value of the electrode gap when the arc extinguishes, the arc energy, the maximal value of the contact voltage during the opening phase, and the electrode erosion. The study of the erosion is achieved with the help of a 3-D profilometer enabling the measurement of mass transfer and, for instance, of the amount of molten or evaporated metal.Index Terms-Electric arc, electrical contacts, erosion, hybrid vehicle, 36-V dc.

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Section: B Arc Duration and Extinction Gap Versus Arc Intensity For mentioning

confidence: 94%

High-Intensity Contact Opening Under 36-V DC Voltage Application for Mild Hybrid Vehicles

Klonowski

Andlauer

Leblanc

et al. 2007

IEEE Trans. Veh. Technol.

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“…However, it was found that lower surface temperature alone may not be sufficient because of the presence of hot particles such as W or C in arcing could reduce the dielectric strength of the gap. The complicated effect of a magnetic field on arc motion, especially in MCCB was discussed by McBride [8] and felt further work is required.…”

Section: Introductionmentioning

confidence: 98%

Study of Arc Mobility and Reignition in a Static Gap Discharge with Magnetic Field

Leung¹,

Harman²,

Doublet³

et al. 2010

2010 Proceedings of the 56th IEEE Holm Conference on Electrical Contacts

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Arc mobility on contact surface is an important factor in contact erosion and circuit interruption. The two stages of arc mobility are the initial immobile arc followed by the running arc. Past work in the literature showed that immobile arc time is dependent of contact material, current and contact separation speed until a minimum separation speed is reached. When the arc is in the running stage, then contact material strongly affects arc velocity. In this paper, we re-examine the contact material effect with analysis of the arc spot eroded surface morphology to compare material modifications that can affect the arc mobility and reignition. A static gap discharge with various external magnetic field strength is used to affect the arc mobility. Several groups of contact materials are examined including Ag or Cu, Ag, and in composites with C, W, WC, CdO, SnO2.

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“…Previous empirical investigations have been carried out to study arc motion and its influence on current limitation [3] - [8], re-ignition in an attempt to improve the switching performance [2], [9], [10], or arc splitting process by the splitter plates in the quenching chamber of the LVSD [11]. McBride et al investigated the influence of several parameters on arc motion (the duration the arc root remains in the contact region) in miniature circuit breakers (MCBs) by recording arc motion through the arc imaging system (AIS) [3] - [5]. It was observed that a high contact opening velocity, wide vent area, closed gap behind the movable contact and iron plate behind the arc runner lead to improved arc motion away from the contact region; conversely, contact material and arc polarity have a minimal influence.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Arc Motion Near Splitter Plates in Low-Voltage Switching Devices

Shin

Bull

McBride

2021

IEEE Trans. Compon., Packag. Manufact. Technol.

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Switching performance of a low voltage switching device (LVSD) is determined by limiting current and stopping re-ignition. This is strongly influenced by how the arc moves inside the LVSD quenching chamber during the switching process. Improved switching performance is achieved when the arc quickly enters and stays inside the splitter plates of the LVSD, with the arc attached to the surface of the plates.This paper studies arc motion around splitter plates in LVSDs and the correlation with arc voltage. Arc motion is investigated using a high-speed optical arc imaging system (AIS). It is observed that the arc fluctuates as it enters the splitter plates, with periods inside the plates followed by sudden re-strikes of the arc roots outside the plates. The AIS system allows the measurement of arc displacement and a correlation with the arc voltage. The results show two phases, with a narrow correlation while the arc in the chamber out of the splitter plates and a distributed correlation while in the splitter plates. Further a new performance parameter the splitter time (ST) ratio is defined. The influence of the ST ratio on the chamber vent design is investigated. It is found that with wider and well distributed vent apertures the ST ratio is higher than with a closed vent, and arc motion on entry to the plates is improved.

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Arc root mobility during contact opening at high current

Cited by 28 publications

References 9 publications

High-Intensity Contact Opening Under 36-V DC Voltage Application for Mild Hybrid Vehicles

High-Intensity Contact Opening Under 36-V DC Voltage Application for Mild Hybrid Vehicles

Study of Arc Mobility and Reignition in a Static Gap Discharge with Magnetic Field

Experimental Study of Arc Motion Near Splitter Plates in Low-Voltage Switching Devices

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