FIELD: electric engineering. SUBSTANCE: anode of electrode is shaped as outer tube. Electrode having axial hole is located inside anode along its axis. Anode has blind hole cap which is made from porous material (graphite) having open porosity. Expendable insertion with holes is mounted inside electrode. Holes connect arc zone with chamber between bottom of cap and insertion. EFFECT: increased functional capabilities. 1 tbl, 1 dwg
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