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1 oktober 2025
Electrical project for the future required high water and wastewater security
New electrical cables were to be laid close to homes, roads and a sensitive sewer pipe. The solution was powerful pumps with level float switches and round-the-clock monitoring by IBECO staff.
Close to homes and busy roads, work was under way where nothing could be allowed to go wrong. New electrical cables were to be laid underground, which required handling of a sensitive sewer pipe. With powerful pumps and meticulous monitoring, IBECO contributed to safe working, future-proofed electrical power and a sustainable water and wastewater network.
The reason for the intervention was that Craftor AB had been commissioned by Vattenfall to increase electrical capacity in an area outside Stockholm. To lay the new electrical cables, Craftor enlisted the help of Svenska Entreprenad Gruppen AB (SEGAB). The assignment required careful planning and precise execution, as the work was to be carried out in a ground area where a 1400 millimetre pipe carries wastewater to a treatment plant.
– To tunnel beneath the electrical cables, we first had to remove a twelve-metre section of the old concrete pipe. That was absolutely crucial to creating a stable and reliable environment, says Bakhshis Singh, project manager at SEGAB.
– The wastewater pipe that was removed dated from the 1960s. On behalf of Solna Vatten, we then replaced it with a new, robust steel pipe. So in addition to increasing electrical capacity, an important part of the sewer network was also modernised, Singh continues.
A flow that can never stop
Carrying out the laying of the electrical cables required bypass pumping. The job went to IBECO Rental, which installed four BBA 300 pumps (three in operation and one on standby) with Stage 5 engines run on HVO diesel to minimise environmental impact. The flow in the sewer pipe amounts to around 650 litres per second. The three pumps used have a combined capacity of close to 1000 litres per second.
The bypass pumping ran through a temporary DN500 line approximately 50 metres long, which returned the water to the main on the other side of the work area. The pumping solution was surrounded by high levels of security.
– We built a redundancy system with level float switches that automatically start standby pumps if the flow rises, for example during heavy rain, says Daniel Snäll, district sales manager at IBECO Rental.
Critical round-the-clock monitoring
During six intensive weeks, IBECO technicians were also constantly on site. They monitored the pumps around the clock, tracked flows via cameras and carried out regular inspection rounds in the area to quickly detect the slightest deviation.
– This wasn't a project where we could afford a two-hour response time. A breakdown could have ended really badly. Nothing could be allowed to go wrong, says Daniel Snäll, adding:
– If a pump had stopped and the water had overflowed, it could have flooded both roads and basements in homes in the surrounding area. There was also a lake at risk a short distance away.
Future-proofed power and water
After six months of work and intensive weeks of bypass pumping, SEGAB was able to install the new steel pipe, restore the flow and complete the project.
– This was an unusually complex job, but everything went perfectly. We've worked with IBECO before, and working with them always runs smoothly, Singh sums up.
In addition to securing the future operation of the new electrical lines, the area has now also gained a modernised and more sustainable wastewater solution for the long term.
The project was the largest of a series of sub-projects that Craftor is carrying out to increase electrical capacity at several locations in the Stockholm area.