Ending portal
A tensioning portal is a portal-like line support point for the laying ( tensioning ) of cables in switchgear such as a substation . Anchoring portals are mostly tubular steel constructions or open welded constructions or open steel framework constructions. For reasons of corrosion protection and strength checks, no surfaces should be inaccessible.
The trains, divided into xyz directional forces, are absorbed by the horizontal “bar” (approx. 10 m long in 110 kV systems) and directed into the “posts” that are solidly concreted in the ground. The steel-reinforced bucket foundation on a base plate absorbs all, including exceptional, additional loads in the case of extreme conductor runs. The design of the scaffolding statics is based on the results from regulation ÖVE L11 or the VDE regulation.
Guy portals, formerly 220 kV
Guy portal right in front of a switch house
Bracing portals for a busbar
Guy mast and guy portal, 380 kV
110 kV, one line carries medium voltage and leads to a termination
literature
- Reinhard Fischer, Friedrich Kießling: Overhead lines: planning, calculation, execution . 4th edition. Springer, Berlin 2012, ISBN 978-3-642-97925-5 .