Protective device of dry-type transformer

The utility model relates to the technical field of dry-type transformers, and discloses a protective device of a dry-type transformer, which comprises a main body mechanism, a fastening mechanism and a heat dissipation mechanism, the heat dissipation mechanism is positioned at the inner end of the main body mechanism, the heat dissipation mechanism is positioned at the lower end of the main body mechanism, the main body mechanism comprises a barrel body, a sealing rubber ring I and a top plate, the first sealing rubber ring is fixedly installed at the upper end of the barrel body, and the top plate is fixedly installed at the upper end of the first sealing rubber ring. According to the protection device of the dry-type transformer, by installing the fastening mechanism and the heat dissipation mechanism, when the dry-type transformer is used, sealing protection is directly conducted on the dry-type transformer, and then the overall protection force on the dry-type transformer can be greatly improved; and mea