Transmission Poles

Transmission Poles

As the leading manufacturer of power delivery structures in China, WT Power has many years of experience engineering, designing and manufacturing steel transmission and distribution structures ranging from 10kV to1100kV. From a single pole to large projects with various configurations, WT Power will meet your needs.

Whether a single pole, multi-pole,H-frame, A-frame, 3-pole or custom structrue, we works with clients to design and manufacture specialty structures. All of our poles are manufactured with an emphasis on quality and ease of installation. Specialty structures are pre-fit by experienced fabricators prior to shipment for smooth field experience. We provide various foundation options to ensure the lowest installed cost solutions. These include anchor-based, direct embed, caisson and even full-length anchor cage styles, as required by foundation parameters.

An overhead power transmission pole is a special structure designed to hold the wires of overhead power lines, as well as lightning protection cables, at a given distance from each other and from the earth's surface.

Each power transmission pole is designed to perform a specific function assigned to it.

Based on their purpose power transmission poles could be the following:

Tangent-suspension poles are designed for installation on straight sections of overhead power lines, they perform exclusively the function of supporting wires and cables, and are not designed for loads of pulling wires along the line.

Anchor – used on straight sections of overhead lines to cross power lines through railways, highways, bridges and small rivers. The design of the anchor poles withstands a significant load of pulling wires and cables.

Long-span poles are used when power lines cross large obstacles. Long-span poles are the heaviest of all power transmission poles, they can reach heights of up to 300 m, and they are the ones that bear the greatest loads.

Angle-suspension poles are installed at the turning angles of the overhead line route. At the angle up to 30°, when the load is not so great, tangent-suspension poles are used. If the turning angle is greater, a more rigid structure is needed, and in this case, angle-suspension anchor poles with appropriate wire fastening are used.

Dead-end structures (poles) are installed at the beginning or at the end of the overhead lines, placed in front of electrical substations on the portals of outdoor switchgear.

Transposition poles are used to change the order of the wires on the poles.

Branch poles are used for organizing branches from overhead lines.

Cross poles are installed at the intersection of overhead lines of two directions.

Windproof poles are used to enhance mechanical strength.

The history of the development of the overhead power transmission poles has three periods: wood, concrete and metal.

When the need arose for the transmission of electricity over long distances for the first time, it was quite logical that the most affordable material at that time was used for the construction of power lines – the wood. However, very soon its drawbacks became obvious – rotting of wood in the place of contact with the ground, weak durability and vulnerability in front of fires.

They were replaced by more durable concrete poles that are not exposed to fire, corrosion and chemicals, the only and significant drawback of which is their huge weight, that creates difficulties during transportation and installation of the poles. Also, the problem was their disposal after the poles became unusable.

And now, concrete poles are replaced by metal poles which do not have the above drawbacks.

Let's compare the two most popular types of metal poles for power lines - lattice and multifaceted.

If you need us to provide the design, parameters and quotation, or according to your design to quote, please contact and email us!