News
Feb 28, 2018 - Reliable and High Grade Quality Dead End Transmission Poles
Dead end transmission poles form key parts of power distribution lines. These self-supporting structures are used in the construction of overhead power lines. These can also be found at substations that facilitate high to low voltage transformation and vice-versa, to deliver electricity to consumers.
When built with utmost accuracy and precision, these poles can keep high voltage conductors separated from each other and their surroundings. The result are towers that are integral to electrical transmission systems, engineered for reliable performance and cost-effective power distribution.
The Basics of Dead End Transmission Poles
Dead end transmission poles come in both monolithic pole and frame structures used in transmission line construction. Typically 150 ft. tall with crossarms up to 100 ft. wide, or diameters up to 5’6” and heights of 200 in., these poles are designed to withstand grueling conditions involving heavy-duty structural overhead transmission line projects.
To safely and effectively perform in the field, dead end transmission poles must meet the high standards of the Canadian Welding Bureau (CWB), and be certified according to the internationally recognized ISO 9001: 2008 Quality Management Systems Standards.
Why Dead End Transmission Poles
Typically, a dead-end structure is used in applications wherein conductors and ground wires are pulled only on one side, unless it is a double-end structure. These are used wherein the transmission line ends, the line turns at a sharp angle, transmission is required over major crossings, such as highways and rivers, and lines need to be divided into segments.
Aside from the structural application, factors such as terrain, erection technique, electrical constraints, access and transport, structural loading, and procurement are also taken into consideration when selecting the right type of pole for a specific application.
3 Commonly Used Materials in Dead End Transmission Poles
Depending on the location and specific application, there are a number of materials that can be used to construct these poles. For industrial uses, these are:
Tubular Steel: Known for its durability, ease of manufacturing and installation, this material is typically assembled in the factory, and most commonly used in power distribution systems.
Lattice: The lattice is the most commonly used for high voltage transmission lines. In general, lattice towers are assembled at the location it is to be erected. These structures use galvanized steel and the aluminium is used for reduced weight.
Concrete: This structural material can be used for distribution systems and transmission lines and are commonly used in the United States and Canada.
Connecting the Conductors
After selecting the materials and having the dead end transmission poles customized according to their use, conductors must then be connected to set up the application. Known as the most explosive part of setting up dead end transmission poles, ‘implosive jointing’ is required to connect the two ends. Once the charge is detonated, the implosion compresses the two ends and sleeve onto each other, permanently connecting them, and signaling that the poles can now be used in operation.