Suspension tower
a suspension tower
In an electric power transmission line, a suspension tower is where the conductors are simply suspended from the tower, the mechanical tension being the same on each side.
suspension towers
In this case, the tower is supposed to carry a downward force, and a lateral force, but not a longitudinal force.
a guyed tower
These may have, for each conductor, an insulator string hanging down from the tower, or two strings making a "V" shape. In either case, sometimes several insulator strings are used in parallel to give higher mechanical strength. These are used where a transmission line continues in a straight line, or turns through a small angle. In other cases, a tension tower (C or D Towers) is used.
See also
In France it's common to bend lines at suspension towers with single insulators pulled to the side.
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