Series connection casing type furnace transformer with top-bottom structure

The utility model discloses a series connection casing type furnace transformer with top-bottom structure, which belongs to transformers. The utility model aims to provide the transformer with low impedance voltage, small eddy current loss and good heat dissipation effect. The furnace transformer comprises an oil tank, a main transformer and a series connection transformer, wherein, the main transformer comprises an iron core of the main transformer and low voltage windings of the main transformer; the series connection transformer comprises an iron core of the series connection transformer and low voltage windings of the series connection transformer; the series connection transformer is fixed at the top end of the main transformer; an oil isolation plate (5) is arranged among the iron core (1) of the main transformer, the iron core (12) of the series connection transformer and the oil tank (3); the low voltage windings (4) of the main transformer are connected in series with the corresponding low voltage wi