Electricity economizer

The utility model relates to an electricity economizer which is composed of three independent divided electricity economizing circuits. Each divided electricity economizing circuit comprises an output circuit which is composed of a thyristor element and a protection capacitor and a sampling control circuit which is composed of three resistors, a bidirectional diode and two dacron capacitors, wherein the first end of the thyristor element is used as an input end, and is connected with one phase of three-phase electricity; the second end of the thyristor element is used as an output end, and is connected with a phase connecting terminal of load; the protection capacitor is connected in parallel between the first end and the second end; the third end of the thyristor element is connected with the common point of the second resistor and the third resistor which are connected in series in the sampling control circuit; in the sampling control circuit, the first resistor and the bidirectional diode are connected with the first end and the third end of the thyristor element in parallel after connected with the second resistor in series; the third resistor is connected between the third end and the second end of the thyristor element after connected with the second dacron capacitor in parallel, the first dacron capacitor is connected in parallel between the common point of the first resistor and the output end.