scholarly journals Rotating Constricted Switching Arcs Burning in Gas and in Vacuum

2017 ◽  
Vol 4 (2) ◽  
pp. 173-176
Author(s):  
D. Baron ◽  
S. Ettingshausen ◽  
M. Koletzko ◽  
A. Lawall ◽  
T. Rettenmaier ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
High Velocity ◽  
Scaling Law ◽  
Metal Vapor ◽  
Transverse Magnetic ◽  
High Current ◽  
Circuit Breakers ◽  
Current Interruption ◽  
Magnetic Probes ◽  
Contact Size

The method of controlling high-current switching arcs by transverse magnetic fields (TMF) forcing the constricted arc to rotate in a contact system is being applied successfully to improve the breaking capability of vacuum interrupters and gas circuit breakers. We describe the behavior of magnetically driven switching arcs in vacuum and in gas environment. We report on experiments using high-velocity videography, magnetic probes, and spectroscopy; they deliver the velocity, the temperature and the voltage of an arc. We present models and simulations of the moving constricted arc burning in metal vapor and in air. And we describe a particular switching application of TMF arc control and explain a scaling law of the contact size with the current interruption capability.

scholarly journals Post-Arc Characteristics of High-Current Arcs in Vacuum Circuit-Breakers

2019 ◽  
Vol 6 (2) ◽  
pp. 170-174
Author(s):  
N. Wenzel ◽  
W. Haas
Keyword(s):  
Short Circuit ◽  
Early Period ◽  
Metal Vapor ◽  
Transverse Magnetic ◽  
High Current ◽  
Electric Resistance ◽  
Circuit Breakers ◽  
Arc Characteristics ◽  
Current Zero ◽  
Short Circuit Currents

The post-arc (PA) characteristics of vacuum arcs in transverse magnetic field contacts are studied for short-circuit currents of up to 123 kA peak and transient recovery voltages below 875 V. The measured PA currents are interpreted in terms of an Electric Resistance Model and the models of Andrews-Varey, Langmuir-Child, and Slepian-Schmelzle. Whereas in the late PA period, the calculations do not agree well with the measurements, the PA behavior is well described in the early period after current-zero. It is concluded that the PA discharge is amplified by ionization of metal vapor particles in the boundary sheath due to electron impact.

scholarly journals High-current interruption in vacuum circuit breakers

1997 ◽  
Vol 4 (6) ◽  
pp. 836-840 ◽  
Author(s):  
M. Binnendijk ◽  
W.F.H. Merck ◽  
R.P.P. Smeets ◽  
K. Watanabe ◽  
E. Kaneko
Keyword(s):  
High Current ◽  
Circuit Breakers ◽  
Current Interruption
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