A three phase transformer is constructed by winding three single phase transformers on a single core. These transformers are put into an enclosure which is then filled with dielectric oil. The dielectric oil performs several functions. Since it is a dielectric, a nonconductor of electricity, it provides electrical insulation between the windings and the case. It is also used to help provide cooling and to prevent the formation of moisture, which can deteriorate the winding insulation, Three Phase Transformers are four winding transformers designed for two purposes. The first is to function as a low voltage isolation transformer with a capacity of .050 KVA to 5.0 KVA. The other is to correct consistently low or high voltage conditions. Variation of the input voltage is passed through to the output side of the transformer in the same percentage.

A three phase transformer is constructed by winding three single phase transformers on a single core. These transformers are put into an enclosure which is then filled with dielectric oil. The dielectric oil performs several functions. Since it is a dielectric, a nonconductor of electricity, it provides electrical insulation between the windings and the case. It is also used to help provide cooling and to prevent the formation of moisture, which can deteriorate the winding insulation, Three Phase Transformers are four winding transformers designed for two purposes. The first is to function as a low voltage isolation transformer with a capacity of .050 KVA to 5.0 KVA. The other is to correct consistently low or high voltage conditions. Variation of the input voltage is passed through to the output side of the transformer in the same percentage.