Investigation of the magnetic field distribution between the vacuum chamber contacts

Abstract

Measurement of the three components (axial, radial and azimuthal) of the magnetic field distribution (MFD) over the contact plate surface, having different slit shapes were made in a specially designed stand. These measurements were made for different azimuthal positions of both contacts, to analyze the influence of their position on the MFD. The results of measurements were presented and discussed.Selected contacts were installed in a dismountable vacuum chamber and switching tests were made at short circuit current from 1 kA to 16 kA. Switching arc was recorded by means of a high speed camera and the distribution of arc spots was observed.I.

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.…”