FIELD: welding; DC supply source for inert gas-shielded arc welding with nonconsuming electrode. SUBSTANCE: transformer of rectifier has spaced primary and secondary windings with shunt magnetic circuit placed in between. Shunt has nonmagnetic gap relative to main magnetic circuit of transformer. Winding embraces the shunt. This winding can be placed in series aiding or in opposition with primary windings or in series aiding with secondary windings. EFFECT: enhanced reliability of operation. 3 cl, 1 dwg
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