Decay Modes of Anode Surface Temperature After Current Zero in Vacuum Arcs—Part II: Theoretical Study of Dielectric Recovery Strength

2015 ◽  
Vol 43 (10) ◽  
pp. 3734-3743 ◽  
Author(s):  
Zhenxing Wang ◽  
Yunbo Tian ◽  
Hui Ma ◽  
Yingsan Geng ◽  
Zhiyuan Liu
Keyword(s):  
Surface Temperature ◽  
Theoretical Study ◽  
Anode Surface ◽  
Decay Modes ◽  
Current Zero

Decay Modes of Anode Surface Temperature After Current Zero in Vacuum Arcs-Part I: Experimental Study

2014 ◽  
Vol 42 (5) ◽  
pp. 1464-1473 ◽  
Author(s):  
Zhenxing Wang ◽  
Hui Ma ◽  
Guowei Kong ◽  
Zhiyuan Liu ◽  
Yingsan Geng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Surface Temperature ◽  
Anode Surface ◽  
Decay Modes ◽  
Current Zero

Measurement of Transient Temperature Distribution at Anode Surface After Current Zero in Vacuum Interrupter

2021 ◽  
Vol 141 (11) ◽  
pp. 712-717
Author(s):  
Akira Daibo ◽  
Yoshimitsu Niwa ◽  
Naoki Asari ◽  
Wataru Sakaguchi ◽  
Yo Sasaki ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Anode Surface ◽  
Transient Temperature ◽  
Vacuum Interrupter ◽  
Transient Temperature Distribution ◽  
Current Zero

A Microscopic Study of Before-Arc Process in Metal Vapor Plasmas Proximal Cathode Region. Part I Formation of the Proximal Cathode Region

2013 ◽  
Vol 325-326 ◽  
pp. 1339-1342
Author(s):  
Jing Li ◽  
Qiu Ting Yu ◽  
Yun Dong Cao ◽  
Xiao Ming Liu ◽  
Chong Xu
Keyword(s):  
Theoretical Study ◽  
Charged Particles ◽  
Metal Vapor ◽  
Particle Energy ◽  
Cathode Region ◽  
Plasma Sheath ◽  
Vacuum Arc ◽  
Anode Surface ◽  
Necessary Condition ◽  
Complex Phenomena

Metal vapor arc in vacuum breaker is a very complex phenomena and the researches on the process of arc creating are the effective method to improve breaking ability. By the theoretical study and numerical simulation, exploring the formation of plasma sheath near the cathode, charged particles energy distribution and influence elements in before-arc process are the fundamentals of this paper. Before-arc process is the fundermental of arc energy and the proximal cathode region is the important area for vacuum arc forming, so before-arc process of metal vapor arc was simulated here. The modification to electron motion produced by the interaction between charged particles and plane electrodes and both elastic and charge exchange collisions between electrons and neutral gases were considered here. The copper cross section adopted here was related to the particle energy. The tracks of electrons were traced until they reached to the anode surface. Based on this method, the formation of proximal cathode region and some microscopic parameters were simulated here. The results show that the collision between charged particles with the electrodes is the necessary condition in proximal cathode regions formation.

scholarly journals Emission Spectroscopy During High-Current Anode Modes in Vacuum Arc

2017 ◽  
Vol 4 (3) ◽  
pp. 249-252
Author(s):  
A. Khakpour ◽  
R. Methling ◽  
St. Franke ◽  
S. Gortschakow ◽  
D. Uhrlandt
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission ◽  
Metal Vapor ◽  
Vacuum Arc ◽  
Anode Surface ◽  
High Current ◽  
Temporal And Spatial Distribution ◽  
Vacuum Interrupter ◽  
Ionic Copper ◽  
Current Zero

A vacuum interrupter reaches its interruption limit once high-current anode phenomena occur. High-current anode modes lead to an increase of the anode surface temperature and an increased generation of metal vapor, which may result in a weakening of the dielectric recovery strength after current zero. In this work, different discharge modes in a vacuum arc for AC 50 Hz including diffuse, footpoint, anode spot type 1 and type 2, and anode plume are investigated. Electrodes made of CuCr7525 with diameter of 10 mm are used. The final gap length is about 20 mm. Time and space resolved optical emission spectroscopy is used to examine the temporal and spatial distribution of atomic and ionic copper lines. The distribution of atomic and ionic lines parallel and perpendicular to the anode surface is investigated. Radiator density is also determined for CuI, CuII, and CuIII near the anode surface.

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