One level arrangement
The one- level arrangement is an arrangement of all conductor cables on a high-voltage pylon in one level. The one-level arrangement leads to a low construction height of the mast, combined with a large route width . It is almost always used for overhead lines for high-voltage direct current transmissions and traction current lines and for three-phase high-voltage transmission (DHÜ) when the masts must not be too high. The disadvantage of this arrangement is poor coverage by the lightning protection cable .
One speaks of a single-level mast if the overhead line mast supports only 1 or 2 systems in the single-level arrangement. There are also barrel masts with a one-level arrangement, these support up to 6 systems.
While the Danube mast predominates in the old federal states, the single-level mast is the most common one in the new federal states, often without a lightning protection cable and with traverses that taper off to a point just before the ends.
gallery
Single-level masts for 110 kV and 220 kV near the Karlsruhe-Forchheim airfield
110kV single-level masts for crossing under a high voltage line
One-level mast in the typical design of the new federal states
Masts in double one-level arrangement for 4 systems, with additional earth wire cross-beam for better lightning protection
One level mast in the Netherlands
Medium voltage line in one level arrangement in Poland
literature
- Rudolf Busch: Electrical engineering and electronics: for mechanical engineers and process engineers . 6th adult and revised Edition. Vieweg + Teubner, Wiesbaden 2011, ISBN 978-3-8348-0998-8 , pp. 336 ( limited preview in Google Book search).