Radiotone Oil Cooled Variable Autotransformer

We specialize in the manufacture of high current rated coils. The commutator surface of our coils is machine processed and hence very uniform and smooth. This is very important for proper collection of current by the carbon brushes thus reducing the heat generated. Our standard coils are 100 Amp, 150 Amp, 200 Amp.

Using these coils we manufacture Oil Cooled Variable Autotransformers (colloquially known as Variac) from 100 Amp 3 Phase to 1200 Amp 3 Phase capacity (415 V input and 0-470 V variable output). In high current rated models of Oil Cooled Variable Autotransformers, we use multiple coils with properly rated balancing coils to achieve the rated current. Based on the calculations of cooling area, appropriate number of radiators & fins are used. These Oil Cooled Variable Autotransformers (colloquially known as Variac) are generally motorized with geared mechanism.

We also cater to tailor-made requirements of Oil Cooled Variable Autotransformers.