Zero-loss depth current limiting device

The utility model relates to the technical field of current limiting equipment, in particular to a zero-loss depth current limiting device, which comprises an outer shell and a zero-loss depth current limiting circuit arranged in the outer shell, the outer shell at least comprises an upper epoxy cylinder, a heat dissipation unit is arranged in the upper epoxy cylinder, the heat dissipation unit comprises a mounting frame, and a plurality of radiating fins are arranged on the mounting frame. The upper epoxy cylinder is of an annular cylindrical structure arranged on the inner side of the upper epoxy cylinder; the multiple first heat absorption pieces are annularly arranged on the mounting frame at intervals; the second heat absorption part is of an annular heat absorption structure arranged at the lower end of the first heat absorption part; the zero-loss deep current limiting device comprises a first heat absorption piece and a second heat absorption piece, the first heat absorption piece is in contact connec