The utility model discloses a high-power column type voltage regulator of on-off three-phase, including first casing, the upside fixedly connected with second casing of first casing, the first motor of downside inner wall fixedly connected with of second casing, the upside fixedly connected with second motor of second casing, the first pivot of output end fixedly connected with of the left and right both sides of first motor, the output end fixedly connected with second pivot of the left and right both sides of second motor, equal first bevel gear of fixedly connected with in first pivot, the second pivot is located two the epaxial first bevel gear meshing of first pivot has the second bevel gear. The utility model discloses in, through the cooperation of first casing, filter screen, dry layer, movable block etc. can not influence the heat dissipation of voltage regulator again when can carrying out the protection to the voltage regulator to brush through on the movable block can carry out periodic cleaning with the dust on the filter screen.
