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what is the difference between VARIAC,AUTO
TRANSFORMER,DIMMERSTAT.
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Answer Posted / chandra sekhar
A transformer, in which only one winding is there is called so, a part of the winding is common to both the primary and secondary circuits, it is called autotransformer/variac/dimmerstat. ["Variac" and "Dimmerstat" are trade names of variable autotransformers. "Dimmerstat" is originally registered by "AE" the pioneers in this product in India.All other manufactures have registered this product in different names,like "Varivolt""Varitrans" etc.]
(Dimmer is: A rheostat that varies the current through an electric light in order to control the level of illumination)
The "auto" (greek for "self") prefix refers to the single coil acting on itself (it doesn.t signify any kind of automatic mechanism).
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