Until now to underground high voltage cables, it was necessary to do huge excavations with the high deployment of machinery, workforce and time.
The Wartjenstedt test, however, has demonstrated that cable grounding is possible with minor disarrangement of the existing soil structure, halving costs and construction times at the same time. The test was carried out for a length of about 200 meters by laying the pipes for 380kV three-phase power cables.
A ground-friendly process that minimised excavation. The rich topsoil is removed and stored on-site. A special ram dug a duct for each of the three tubes, a trench 120cm wide. At the same time, the machinery placed the cables directly in the ground.