THREE-PHASE CONTROLLER OF AC VOLTAGE WITH PROTECTION Russian patent published in 2013 - IPC H02M5/257 G05F1/00 G05F1/12 

FIELD: electricity.

SUBSTANCE: device comprises an inlet terminal 1 for connection of a source of signal setting, a summator 2, an integrator 3, the first 4, second 5 and third 6 relay elements, the first 7, second 8, third 9, fourth 10, fifth 11, sixth 12, seventh 13, eighth 14 and ninth 15 comparators, the first 16, second 17 and third 18 dynamic D-triggers, buses of voltage of a circuit of phases of A, B, C-terminals 19, 20, 21, the first 22-1, the second 22-2 and third 22-3, the fourth 22-4, the fifth 22-5, the sixth 22-6, the seventh 22-7, the eighth 22-8 and the ninth 22-9 power switches, a three-phase load with a zero outlet 23, the first 24-1, the second 24-2, the third 24-3, the fourth 24-4, the fifth 24-5, the sixth 24-6, the seventh 24-7, the eighth 24-8 and the ninth 24-9 sensors of conductivity, an arithmetic-logical device 25, a terminal "reset" 26, the first and second selectors of pulse duration 27 and 29, "Emergency disconnection outlet" 28, a terminal "Duplicating outlet of protection" 30.

EFFECT: increased reliability of an AC voltage controller by diagnostics of failures in power switches.

5 dwg