STATISTIC ANALYZER OF QUALITY OF ELECTRIC POWER CHARACTERISTICS Russian patent published in 1997 - IPC

FIELD: electric instruments, in particular, statistic monitoring of voltage alternation. SUBSTANCE: device has converter of input signal to direct voltage, multiple-threshold comparator, channels which have counters and commutators, control unit, statistic processing unit, sample interval setter and unit which calculates statistic moments. Multiple-threshold comparator is designed as generator of set of reference voltage levels and threshold gates. Statistic processing unit has converter of instantaneous voltage levels to digital code, first delay gate, first flip-flop, first group of AND gates, counter of samples number, first squarer, first code adder, second code adder, second delay gate, second flip-flop, first code multiplication circuit, second and third groups of AND gates, reverse counter, second squarer, code subtraction circuit, second code multiplication circuit, first and second code dividing circuits, control input and outputs. unit which calculates statistic moments, sample interval setter and corresponding connections are introduced to accomplish the goal of invention. EFFECT: increased functional capabilities. 2 cl, 2 dwg