FIELD: hydraulic machinery engineering. SUBSTANCE: contact 13 of control servomotor 10 is connected to electric circuit of solenoid drive 12 of auxiliary servomotor 4. During acceleration of hydraulic turbine solenoid spool valve 9 shifts admitting oil to servomotor 10 which actuates throttle 11 closing passage area of oil pipe line 6. When servomotor 10 operates, contact 13 closes; as a result, solenoid drive 12 actuates servomotor 4 which shifts main spool valve 2 feeding oil to servomotor 8 of guide vanes assembly of hydraulic turbine. EFFECT: simplified construction of system. 1 dwg
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