Mast

Mast

A support mast is an overhead line mast that, unlike a guy mast, does not absorb any tensile forces from the cable, but only bears the weight of the continuous conductor cables and thus keeps the cable at the required height to ensure ground clearance.

In the case of a support mast, the insulator (or a pair of insulators) hangs vertically on the cross-beam when viewed from the side (one also speaks of "hanging chains"). Seen in the direction of the route, the insulator can deviate from the vertical if transverse forces are present, for example in the case of an angled support mast or strong cross winds.

For voltages up to about 30 kV, as used in medium-voltage networks , upright insulators are also used. However, these pose a danger to birds, who can easily suffer an electrical accident on such masts .

literature

• Reinhard Fischer, Friedrich Kießling: Overhead lines: planning, calculation, execution . 4th edition. Springer, 2013, ISBN 978-3-642-97924-8 , Chapter 8.2.1 - Support masts.