Optical Investigations of High-Current Vacuum Arc Behavior on Spiral-Shaped and Cup-Shaped RMF-Contacts

Wolf, Christian; Kurrat, Michael; Lindmayer, M.; Wilkening, Ernst-Dieter; Gentsch, D.

doi:10.1109/holm.2009.5284391

Cited by 21 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen that the transition gap distances for spiral‐type I and wan‐type contacts were in the range of 2.5–4.5 mm, but at 12–13 kA, the transition gap distances were slightly larger. This was basically consistent with the critical gap distance of arc movement (2–4 mm) observed in the related literature . However, the transition gap distance of spiral‐type II contacts was in the range of 4.1–5.6 mm, which is higher than the transition gap distance of the other two contacts.…”

Section: Resultssupporting

confidence: 91%

Study on transition process of vacuum arc under transverse magnetic field

Liu

Xiu

Wang

et al. 2019

Contributions to Plasma Physics

View full text Add to dashboard Cite

The transverse magnetic field (TMF) drives the vacuum arc to move along the surface of the contacts to prevent the local overheating and melting of the contact surfaces. The arcing process has great influence on the breaking capacity of short‐circuit current. In this paper, the arcing process between three types of TMF contacts was investigated. The transition process of an arc from the ignition stage to the diffusion stage was discussed. The transition moment, transition gap distance, and transition current were obtained. It was found that the axial magnetic field component of TMF contacts affected the arc transition process.

show abstract

Section: Resultssupporting

confidence: 91%

Study on transition process of vacuum arc under transverse magnetic field

Liu

Xiu

Wang

et al. 2019

Contributions to Plasma Physics

View full text Add to dashboard Cite

show abstract

“…These contacts are relatively flat and are subjected to high, closed contact forces. It has been observed that when these contacts open two or more parallel arcs form before they coalesce into one arc as the contacts open further [4,5,6,7,8]. In fact, one experimental, vacuum interrupter, contact structure [9] shows up to 7 parallel arcs forming as the contacts open, see Fig.…”

Section: Discussionmentioning

confidence: 99%

“…The evidence that multiple regions of contact exist when the large area vacuum interrupter contacts come together has existed for more than a quarter of a century [4][5][6][7][8][9]. Even so, there has been no discussion of the implication of this fact to the design of the vacuum circuit breaker (VCB).…”

Section: The Relevance Of Multiple Regions Of Contact In the Developmmentioning

confidence: 99%

The contact force to prevent large area, closed, vacuum interrupter contacts from welding when passing high fault currents of up to 4 seconds duration

Slade

2015

2015 IEEE 61st Holm Conference on Electrical Contacts (Holm)

View full text Add to dashboard Cite

An analysis is performed on data from an experiment to determine the closed contact force required to prevent the welding of closed, Cu-Cr contacts inside a vacuum interrupter passing 20kA (r.m.s) from 0.5s to 4s. It will be shown that the data can be explained if these closed contacts have more than one region of contact together with the heating of the contact's body during the passage of the current. The implication of this analysis for vacuum interrupters used in vacuum circuit breakers when required to stay closed during the passage of short circuit currents is discussed.

show abstract

“…However, the influence of arc appearance, arc voltage and current on this stage was not studied. Some investigations [11,14] also found that a multi-column appeared between the TMF contacts, but did not give an explanation. The objective of the present research was to determine the arc characteristics during the instability stage and the influence of current.…”

Section: Introductionmentioning

confidence: 97%

Arc characteristics during the instability stage on transverse magnetic field contacts

Pang

Liu

Xiu

et al. 2018

Plasma Sci. Technol.

View full text Add to dashboard Cite

The arcing process greatly affects the breaking ability after current zero. The instability stage is the transition stage from the ignition to the movement stage, which affects the arc movement characteristics. In this paper, the arc characteristics during the instability stage on spiral-type contacts were investigated using a high-speed video camera. A multi-column parallel instability mode and a single-column instability mode were found during the instability stage. The arc appearance and constriction degree changed rapidly. The arc voltage usually increased accompanied by fluctuations. In addition, it was found that the current significantly influenced the arc mode and duration in the instability stage. With increased peak current, the probability of a single-column instability mode increased, and the fluctuation range and average time decreased.

show abstract

Optical Investigations of High-Current Vacuum Arc Behavior on Spiral-Shaped and Cup-Shaped RMF-Contacts

Cited by 21 publications

References 9 publications

Study on transition process of vacuum arc under transverse magnetic field

Study on transition process of vacuum arc under transverse magnetic field

The contact force to prevent large area, closed, vacuum interrupter contacts from welding when passing high fault currents of up to 4 seconds duration

Arc characteristics during the instability stage on transverse magnetic field contacts

Contact Info

Product

Resources

About