Protective device and power plant and thermal power plant control box

The utility model discloses a protective device and a power plant and thermal power plant control box, which comprises a box body, heat dissipation holes arranged on the side wall of the box body, a box door hinged with the other side wall of the box body, and a pull ring arranged on the outer side wall of the box door, the heat dissipation mechanism comprises a driving assembly and a partition plate connected with the driving assembly; the partition plate is in contact with the side wall of the box body and can cover the heat dissipation holes; the limiting mechanism comprises a fixing rod, a sliding assembly with one end in sliding connection with the fixing rod, and a drag hook arranged at the other end of the sliding assembly. And the pull ring and the pull hook are arranged on the same horizontal plane. The beneficial effects of the utility model are that heat dissipation in the box body is realized, and electrical components in the box body are protected when heat dissipation is not carried out. 本实用新型公开