The regulator is formed by circuits incorporating triac controlled by an external command, for the continuous motor speed variation from 40 up to 100% of 220V motor nominal speed, with 9 Ampere max nominal current, for 3 wires connection (fig. 1) for 2 wires connection (fig. 2). The regulator has been made specially for motors connected with fans, aspirators or pumps. It may also be used as a voltage variator for any ohmic load. See that the min. voltage regulation starts from 30-40% of line voltage. The regulator can change voltage from 0 up to max line voltage, upon request. It is housed in a plastic container: on the frontal panel are situated the switch, the hand grip command for speed variation, the trimmer for min. speed regulation and the 15 Ampere fuse, for regulator’s internal circuit protection.