FIELD: electric engineering. SUBSTANCE: capacitor and resistor, which are connected in series, zero-device, which is connected in parallel to resistor and which is connected to AND gate through galvanic decoupling unit, are introduced to accomplish the goal of invention. This circuit is connected in parallel to controlled capacitor. When control signal is sent to AND gate, generator transfers control pulses to thyristor switch only when voltage at inputs of zero-devices is equal to zero. This results in possibility to supply capacitor without current surges. Capacitor is switched off when control voltage at AND gate is switched off. EFFECT: elements operate independently from capacitor capacitance. 3 cl, 4 dwg
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