Why Do High-voltage Disconnect Switches Often Adopt A Double-column Horizontal Rotary Structure?

The double-column horizontal rotating structure is a widely used form in the high voltage isolator industry, and its design style is derived from the basic arrangement of the post insulator with conductive arm in the high voltage isolator switch. The actuating component rotates horizontally to change the position of the conductive arm, achieving the physical conversion of opening and closing actions.

This structure mounts two insulating posts on a foundation or base, with the horizontal conductive arm positioned atop each post and moving with the rotating mechanism. Compared to single-column or vertical telescopic solutions, the dual-column hv isolator can balance rotating loads. This geometry is easier to mechanically adjust in high-voltage scenarios and leaves clear space for subsequent connection devices.