FIELD: electrical engineering. SUBSTANCE: converter has current sensors 2 functioning as current limiters, adjustable resistor 3, series circuits of controlled switches 16, 17. Closing control signal is automatically shaped in converter at slow rate of rise and at current of initially turned-on area of structure of controlled valve. EFFECT: reduced power requirement from control power supply, extended range of maximum permissible loads. 8 cl, 3 dwg
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