Boom (power engineering)
In the field of energy technology, a support structure is referred to as a boom with which electrical conductors are attached to overhead line masts and overhead line masts . The boom keeps the live components away from the earthed mast. The term traverse is often used, especially for overhead lines .
Pure carriers with no electrical function
Overhead lines
Extensions on overhead line masts are often made of the same material as the mast itself (steel framework, steel pipe or reinforced concrete). For reasons of strength, steel profiles are preferably used as brackets for wooden poles.
The length of the boom depends on the operating voltage of the line and on mechanical requirements and can reach 50 meters and more for masts for large spans and high voltages.
In the case of very large line spans that would require very wide booms, a separate mast is instead erected for each ladder, for example when crossing valleys .
Overhead line on railway lines
On electrified railway lines that work with overhead lines , brackets serve to support and guide the contact wire. Insulated steel and aluminum pipes are used for this, and in the case of newer lines, GRP rods with the corresponding connection fittings are also used.
Insulating crossbar
An insulating crossbar consists of non-conductive material and its mechanical design is also suitable for reliably isolating a certain operating voltage. The conductor cables are attached directly to the insulating crossbars , as they also act as the insulators .
This type of construction is widespread in the USA, in Germany it is used for 110 kV overhead lines on wooden masts and as a temporary measure during construction work. The attachment directly to the traverse leads to greater stress on the conductors in wind.