Patent ID: 9431167
Filing Date: 2016-08-30
CPC Classification: H01F

Claim Text:
1. A single-phase electric furnace transformer, comprising: a single magnetic core, said magnetic core having two side columns and at least one main column; a main transformer, having a first primary side winding and a first secondary side winding which are disposed on said at least one main column, wherein said first primary side winding consists of a first winding and a second winding which are connected in series with each other; and a voltage regulating autotransformer, disposed on one of the two side columns of said magnetic core, and having a second primary side winding and a second secondary side winding, wherein said second secondary side winding is an adjustable winding having on-load tap switch, and said adjustable winding is connected in series between the first winding and the second winding of said main transformer.