Electronic speed controllers

Electronic speed controllers are based on the principle of phase angle control by means of triacs. The motors should be internally protected from overheating. They are applicable for speed adjustment of single phase voltage controllable asynchronous electric motors. Minimum speed can be adjusted using potentiometer.
A number of different motors and fans can be controlled with one controller. These devices for continuous speed control one or more voltage-controlled single-phase motors/fans. They feature continuously running, low energy and quiet operation. Fast current and temperature fuses which complete user security. VRE..S models start work from 0 to 100%  power. VRE..H models start work from 100 to 0% power.