FIELD: electric engineering. SUBSTANCE: device provides quick or in-phase automatic turning double-acting redundant power supply on. Angle for device turning-on in mode of quick automatic turning-on is about 20. In addition opposite-phase turning-on of synchronous motors when coasting angles are in range 90-340 is prohibited and in-phase turning-on when coasting angle is 340 is allowed. This is accomplished by introduced two AND gates, two OR gates and prohibition unit. EFFECT: increased functional capabilities. 2 dwg
