TYPES OF TRUSSES USED IN ELECTRICAL ENGINEERING
1. Anchor tower (also called strainer pylons or terminal tower)
These are used at the endpoints of straight runs of conductors. They utilize tension insulators to carry the horizontal tensions of the long stretch of lines. Such endpoints are necessary when interfacing with other modes of power transmission and due to the inflexibility of the conductors. They often require anchor cables for attachment of the conductors
2. Pine towers
It is an electricity pylon for two circuits of three-phase AC current, in which the conductors are arranged in three levels, in pine towers the lowest crossbar has a wider span than in the middle and also has a larger span than that on the top.
3. Transposing towers:
These are terminal towers at which conductors are “transposed” so that they exchange sides of the tower.
4. Termination tower:
It is used for transition of an overhead power line to an underground cable. A termination tower, at which the power line runs further as well as overhead line and as underground cable is a branch. It is suitable for voltages bellow 30kv
5. Branch tower
Is a tower which is used to start a line branch. The line branch is responsible for holding up both the main line and the start of the branch line, and must be structured so as to resist forces from both lines.
6. Lattice tower
Is a freestanding steel framework tower. It is used especially for voltages above 100 kilovolts, as a radio tower (a self-radiating tower or as a carrier for aerials) or as an observation tower.
7. Hybrid tower
Is one which carries electric circuits for different types of current. In principle, hybrid towers supply parallel guidance to electrical lines.
8. suspension tower
Its one where the conductors are simply suspended from the tower, the mechanical tensions being the same on each side. in this case, the tower is supposed to carry a downward force and a literal...
Engineering mechanics and statics by J.L.MERIAM and L.G. KRAIGE
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