Patent ID: 8284006

Claim:
A dry-type electrical transformer system, comprising: a transformer including primary windings about a first vertical axis, secondary windings about a second vertical axis, a core extending through the primary and secondary windings, a pair of top core clamps securing the top of the core, and a pair of bottom core clamps securing the bottom of the core, wherein the primary and secondary windings have air passages extending from the bottom of the windings to the top of the windings; and a housing including a base having an air inlet, a top including an air outlet, and side walls extending around the transformer between the base and the top, wherein the transformer is disposed within the housing and supported by the base, and wherein the housing provides passive convection of air flow from the air inlet, through the air passages in the windings, and to the air outlet driven by natural convection in the absence of a powered air mover.