jäiga tunnusjoonega vooluallikas, mille puhul keevitusvoolu kasvades kaarepinge praktiliselt ei muutu (vrd püsivvooluga vooluallikas)
an arc welding powder source that maintains voltage at relatively constant level, regardless of fairly large changes in current caused by changes in electrode extension (compare: constant-current power source)
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Used primarily with processes that employ a continuously fed wire electrode.
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