Similar to how the American highway system connects towns and cities across the United States, the electric transmission system is responsible for transporting high-voltage electricity from power generating facilities to areas where electricity is needed. It is an extensive system of interconnected networks that is vital to the U.S. economy and our everyday lives.
Westar Energy operates and maintains 6,300 miles of transmission lines and about 28,100 miles of distribution lines (34,500 volts and below) that provide safe, reliable electricity to nearly 700,000 customers.
Transmission lines on Westar Energy's system are defined as lines 69 kV (69,000 volts) and above. The structures that support the transmission lines are commonly steel towers, single large poles and wooden H-frames - which are explained in more detail below. You've probably noticed the size of these large lines as you are driving down the highway.
Westar uses several types of transmission structures, depending on the characteristics of the land along the route and the voltage the line carries. Many existing lines were built according to popular design and available materials at the time of construction. Structures are built using wooden or steel poles. When planning for new lines, special consideration is given to landowners, the environment and wildlife.
A common design seen throughout the Westar Energy service territory. This design allows for longer spans between structures. In general, the height is less than a single-pole structure.
Accommodates double-circuit and single-circuit lines.
Structures are used to pivot or near substations to accommodate line routes.
Structures are used to reroute or turn lines to properties or other obstructions.