High-Current Vacuum Arc Mode Transition of a Horseshoe-Type Axial Magnetic Field Contact With Long Contact Gap

Li, Haomin; Wang, Zihan; Geng, Yingsan; Wang, Jianhua; Liu, Zhiyuan

doi:10.1109/tps.2017.2703810

Cited by 17 publications

(2 citation statements)

References 27 publications

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“…Besides, unbalanced parallel vacuum arcs subjected to bipolar axial magnetic field would result in asymmetrical electrode erosion characteristics in parallel arcing region, e.g., molten layer depth, alloy content, surface microstructure [19]. In addition, arc current had influence on vacuum arc mode transition of parallel vacuum arc branches and the diameter of vacuum arc columns [17]. All these contributions help to better understand the unbalance phenomena of parallel vacuum arcs.…”

Section: Discussionmentioning

confidence: 99%

“…Whereas, arc characteristics of parallel vacuum arcs are quite different from characteristics of air arc and vacuum arc setup. In our previous investigations, non-synchronous arc phenomena in parallel vacuum arcs subjected to bipolar axial magnetic field have been qualitatively described [17], [18]. However, vacuum arc current in each parallel arc branch during arcing was not yet determined quantitively.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Arc Current Distribution of Parallel Vacuum Arcs Subjected to Bipolar Axial Magnetic Field

Wang

Geng

et al. 2020

IEEE Access

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The objective of this paper is to determine dynamic anode and cathode arc current distribution of parallel vacuum arcs subjected to bipolar axial magnetic field. Drawn arc experiments were carried out in a demountable vacuum chamber. A split bipolar axial magnetic field electrode with diameter of 100 mm was specially designed. Arc current of two half split electrode discs were measured through Rogowski coils out of the vacuum chamber. Experimental current ranged from 4.5 to 45.0 kA. Vacuum arc behaviors were recorded by a high-speed camera. Unbalance phenomena of anode current and cathode current of parallel vacuum arcs were observed. The maximum average anode and cathode current density difference between parallel vacuum arcs at current of 45.0 kA were 2.57 and 2.52 A/mm 2 , respectively. Critical value of both anode and cathode current difference ratio at time instant of maximum arc current difference with different arc initial conditions was 0.60. The maximum critical value of time instant of maximum anode and cathode current differences between parallel vacuum arcs with one strong arc branch at arc initial were 3.5 and 4.0 ms, respectively. Moreover, a three-interval arc current development model was proposed to describe unbalance phenomena of parallel vacuum arcs. INDEX TERMS Parallel vacuum arcs, vacuum arc modes, axial magnetic field, arc current.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Arc Current Distribution of Parallel Vacuum Arcs Subjected to Bipolar Axial Magnetic Field

Wang

Geng

et al. 2020

IEEE Access

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Structure improvement of a 126 kV vacuum circuit breaker using electromagnetic-thermal field coupling simulation

Liu

Tan

et al. 2019

Applied Thermal Engineering

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Vacuum arc characteristics of an AMF–TMF composite contact with fixed AMF contacts under different opening velocities

Wang

et al. 2022

AIP Advances

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The objective of this paper is to determine the vacuum arc characteristics of a novel axial magnetic field (AMF)–transverse magnetic field (TMF) composite contact under different opening velocities. The AMF–TMF composite contact consists of a pair of outer fixed AMF contacts and a pair of inner movable TMF contacts. Drawn arc experiments were carried out in an L– C discharging circuit with this composite contact system to observe the differences in the arc development process under different opening velocities. The opening velocity of the inner movable contact was set to 1.3, 1.8, and 2.3 m/s. The arc current was up to 20 kA rms. In the experiments, the arc behavior was recorded using a high-speed camera. The arc current of each contact and the arc voltage were measured. Then the arc characteristics, including the arc current transfer characteristics, diffused arc duration, and mental droplet distribution before zero current, were quantitatively analyzed. Furthermore, magnetic field calculation was carried out to explain why the arc characteristics are different under different opening velocities. Experimental results show that with an increase in the opening velocity from 1.3 to 2.3 m/s, the diffused arc duration before zero current increases from 1.05 to 1.75 ms when the cathode is on the fixed side and increases from 1.30 to 1.90 ms when the anode is on the fixed side. In addition, the quantity of mental droplets between contacts before zero current is less with high opening velocity. It indicates stronger short-current breaking capacity under higher opening velocity. From the simulation results, it can be seen that during the arcing period, more current transfers to the fixed AMF contact under higher opening velocity and generates a stronger AMF. It could explain the earlier diffusion of the vacuum arc column under higher opening velocity.

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High-Current Vacuum Arc Mode Transition of a Horseshoe-Type Axial Magnetic Field Contact With Long Contact Gap

Cited by 17 publications

References 27 publications

Dynamic Arc Current Distribution of Parallel Vacuum Arcs Subjected to Bipolar Axial Magnetic Field

Dynamic Arc Current Distribution of Parallel Vacuum Arcs Subjected to Bipolar Axial Magnetic Field

Structure improvement of a 126 kV vacuum circuit breaker using electromagnetic-thermal field coupling simulation

Vacuum arc characteristics of an AMF–TMF composite contact with fixed AMF contacts under different opening velocities

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High-Current Vacuum Arc Mode Transition of a Horseshoe-Type Axial Magnetic Field Contact With Long Contact Gap

Cited by 17 publications

References 27 publications

Dynamic Arc Current Distribution of Parallel Vacuum Arcs Subjected to Bipolar Axial Magnetic Field

Dynamic Arc Current Distribution of Parallel Vacuum Arcs Subjected to Bipolar Axial Magnetic Field

Structure improvement of a 126 kV vacuum circuit breaker using electromagnetic-thermal field coupling simulation

Vacuum arc characteristics of an AMF–TMF composite contact with fixed AMF contacts under different opening velocities

Contact Info

Product

Resources

About

Structure improvement of a 126 kV vacuum circuit breaker using electromagnetic-thermal field coupling simulation