FIELD: control systems for electrical discharge outcutting machines. SUBSTANCE: negative pole of generator 4 is connected to upper and lower current inputs 8, 9 of an electrode of wire 1, positive pole of the generator is connected to piece 2 being under working. Alternation of voltage or current pulses polarity control is carried out on wire portion between current inputs. When alternation of these pulses polarity is distorted during preset time interval, the energy of generator pulses is reduced and/or working feed is decreased. EFFECT: high reliability of the process. 2 dwg, 1 tbl
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