The invention discloses a design method for a power
transformer low voltage side outlet apparatus, and belongs to the field of
power equipment. The design method for the outlet apparatus, disclosed by the invention, comprises the steps of providing a clamping end matched with a low-
voltage connection pole and a connecting end matched with a power
busbar, and enabling the clamping end and the connecting end to be integrally formed; and arranging a connecting column at the connecting end, enabling the connecting column to be partially embedded in the connecting end and to be in
interference fit with the connecting end, arranging a first conductive columnar part in
interference fit with the power
busbar on the connecting column, coaxially arranging a second conductive columnar part in the first columnar part, enabling the first columnar part to be in
interference fit with the second columnar part, and enabling a
thermal expansion coefficient of the second columnar part to be greater than that of the first columnar part. The design method disclosed by the invention has the following beneficial effects: 1, more conductive areas are generated under the same lap length, so that the
current density is reduced and low temperature rise of the connecting end is realized; 2, the
busbar consumption is reduced and resources are saved; and 3, an electric clearance is expanded or a safety distance is increased, and the electric safety of the equipment is improved.