Elta Single Phase 5-Step Transformer Controller 149-TC18 8 Amp

The Elta 149-TC18 is an 8 Amp single phase transformer voltage controller giving five step speed control of single phase AC fan motors whose peak current does not exceed 8 A. Speed is chosen on a selector switch and the unit has an illuminated on/off switch.It runs on 220 to 240V 50Hz, has a fitted type D MCB for motor protection, an IP20 enclosure and is suitable for ambient temperatures up to 40°C. Because it steps the voltage with a transformer rather than chopping it electronically, it does not create the magnetic motor hum associated with some step-less speed controllers. 8 Amp 5-step transformer controller Single phase What it is best used forQuiet, stepped speed control of larger single phase AC fans where motor hum would be noticed: restaurants and commercial kitchens, classrooms, offices, plant rooms next to occupied space and roof extract. Elta specify it for the SDA450/4-1AC, SDA500/4-1AC and SDA630/6-1AC case mounted fans, the SCD500 and SCD560 single phase cased fans, the SLC400/4-1AC and SLC500/4B-1AC long cased fans, the SEL355/2-1AC mixed flow fan and the Clearflow CF450/4-1AC roof fan.It is the wrong controller for EC fans (use a 0-10V EC controller), three phase fans (Elta's 149-TC33 or 149-TC310) or single phase motors with a peak current above 8 A. Its IP20 enclosure is for dry indoor locations only.Why choose this over alternativesCompatible fans on eFans, as listed in Elta's datasheets: SDA450/4-1AC, SDA500/4-1AC, SDA630/6-1AC, SCD500, SCD560, SLC500/4B-1AC, SEL355/2-1AC and CF450/4-1AC.Transformer control holds the motor on a clean reduced voltage at each step, so it avoids hum, at the cost of five fixed steps and a 6 kg unit. For fans up to 4 A the 149-TC14 is smaller and cheaper; for stepless control of fans with thermal contacts up to 6 A, Elta list the 149-EL61TK as the alternative on the SDA range.Installation notes Check the fan's rating plate: the motor's peak current must not exceed 8 A. Fix the controller indoors in a dry location; the enclosure is IP20 and rated for ambient temperatures up to 40°C. It weighs 6 kg, so fix it to a solid wall. Wire to the fan's Elta wiring diagram for transformer speed control, with the fan's thermal cut-out connected where the diagram shows it. Installation should be carried out by a qualified electrician with a means of isolation in the supply. Browse more fan speed controllers or Elta controllers, or call us for help choosing the right product.Specifications Model 149-TC18 Brand Elta Type Transformer controller (5-step) Max peak current 8 Amp Supply Single phase 220V to 240V / 50Hz Steps 5 Motor protection Type D MCB Enclosure IP20 Weight 6 kg Operating temperature Up to 40°C Switching Selector switch with illuminated on/off switch Manuals & Guides Elta Transformer Controller Datasheet