Power transformer provided with current-limiting fuses inside

The invention discloses a power transformer provided with current-limiting fuses inside. The power transformer comprises a transformer body and an insulating casing arranged outside the transformer body, wherein mounting flanges extending out of the insulating casing are arranged on three side surfaces of the upper edge of the insulating casing; two conical casing pipes extending for the same distance are arranged at the top of the insulating casing, an insulating sleeve is arranged at the lower part of each conical casing pipe, a cylindrical cavity is formed in each conical casing pipe, a primary terminal is arranged at the bottom of the cavity, a cylindrical spring is mounted on the primary terminal, one current-limiting fuse is mounted at the upper part of each cylindrical spring, and insulating protection layers are arranged on the upper surface of the insulating casing and outer surfaces of the two conical casing pipes. When the mounting flanges are fixed and locked, an inner cavity of an inner cone insu