An internal heating method for drying, gelling and final curing of epoxy resin insulation systems used for encapsulating dry type cast distribution transformer coils is disclosed. The internal method uses a Direct-Current (DC) power source to control and supply DC current to resistively heat the transformer...http://www.google.de/patents/US6624734?utm_source=gb-gplus-sharePatent US6624734 - DC voltage/current heating/gelling/curing of resin encapsulated distribution transformer coils
