High-Current Vacuum Arc in a Strong Axial Magnetic Field

Investigation of arc dynamics during vacuum arc remelting of a Ti64 alloy using a photodiode based instrumentation

“…Analysis of the cathode spot distribution at the cathode surface in vacuum circuit breakers under the presence of an axial magnetic field with a non homogeneous radial distribution has shown that the spots tend to locate preferentially in the regions with a weak or strong intensity of the magnetic field depending on the conditions (Chaly et al 2007). Such a behavior has been interpreted from the dependence of the arc voltage with the intensity of the magnetic field (U shaped curve) and by invoking the Steenbeck principle, according to which the spot distribution evolves to minimize the arc voltage.…”

Method of determination of the electron density in the gap of high-current vacuum arc on the base of continual radiation analysis

“…At currents I ≥ 3 kA we stabilized the arcs by AMF with low induction B that corresponded to the minimum of the Volt-Tesla characteristic for the chosen current [12]. The AMF was used to avoid formation of anode spots (constricted erosion attachment on the anode).…”

Influence of contacts’ orientation on the AMF distribution in inter‐contact gaps of VCBs

“…In the opinion of majority VCB's designers and investigators, e.g. [11][12][13][14][15][16], the application of AMF leads to more stable arc behaviour during the current breaking process in comparison with the contacts of RMF type. Therefore, the contact of the AMF type has been considered in the present paper.…”