Access shaft II -Kraftwerk Linth-Limmern AG "Project Linthal 2015"
AZS ARGE Zugangsstollen
RL Pumpenanlagen GmbH, Wollerau
Shafts with a pronounced tilt. drilling water and incoming water must be pumped out.
LH322W submersible pump is used, with a second pump held in reserve. The pump is frequency-controlled and regulated using a submersible pressure probe. If the water level rises, the speed is increased; when the water level falls, the speed is reduced. This type of control was chosen so that a very small pump container can be used which can be easily replaced after each new tunnel section. A model KTZ47.5 pump is built into the drainage water treatment.