Low-voltage side filtering compensation energy-saving rectifier transformer

The invention provides a low-voltage side filtering compensation energy-saving rectifier transformer which comprises a protection box, a heat dissipation plate is embedded in the middle of the top end of the protection box, and a waterproof assembly for preventing rainwater from continuously permeating is movably installed at the top end in the protection box. The waterproof assembly comprises a guiding assembly for guiding and collecting rainwater and a water absorbing assembly for absorbing the rainwater in time, and the guiding assembly and the water absorbing assembly are movably installed at the top end in the protection box; the guide assembly comprises a waterproof groove, outer shafts, outer plates, limiting plates, auxiliary air bags and sealing blocks, the waterproof groove is fixedly installed between the left end and the right end of the top inner wall of the waterproof box, and the outer shafts are symmetrically and rotationally installed at the left top end and the right top end of the interior