The regulator is formed by circuits incorporating triac controlled by an external command, for the continuous speed variation from 30 up to 100% of 220V single and biphase motor nominal speed, with 16 Ampere max nominal current. The regulator has been made specially for motors connected with fans or aspirators. 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 and the trimmer for min. speed regulation.