Ventilation speed controller 149-EL31

• Stepless speed control allows precise fan speed selection • Provides easy adjustment of fan duty for commissioning purposes • TK versions offer means of motor protection via motor thermal contact • IP51 enclosure • Stepless speed control • Minimum and maximum speed pre-set facility • Suitable for operating temperatures up to 40°C • Fitted motor protection fuse • Suitable for two or three wire control Overview TK versions are for use with fans fitted with thermal cut-out protection. In the event of the thermal cut-out, opening the controller will switch off and the trip indicator will be illuminated. Units are complete with illuminated on/off and start button. The start button must be pressed to start the controller once on/off switch is in the on position.