Electrical, security and telecoms systems for the Follo Line

Europe's longest railway tunnel halves the journey time between Oslo and Ski

In this project, OneCo has been a subcontractor for Infranord Norway. Our delivery has included installation and connection of both high-voltage and low-voltage power, as well as signalling and telecommunications systems. This included ensuring that all electrical systems in the area where the Follo Line connects to Oslo Central Station function optimally. The Follo Line, one of Norway's most ambitious railway projects, has been a monumental investment in Norwegian infrastructure. The project, which links Oslo and Ski more closely together with a double track built for speeds of up to 250 km/h, has halved journey times.

Customer: Infranord Norway
Form of contract: Subcontractor in a construction contract
Project period: 2019
Project value: NOK 165 million

This is what we have delivered:

Transformer installation: Ensures reliable power supply to the entire area
Switchgear and main switchboards: Provides control over the power supply and ensures safe operation
Cable systems: Installation of cables for high voltage, low voltage, telecommunications and signalling - both above and below ground
Cable ladder: Installation in tunnels and technical buildings to ensure safe and efficient cable routing
General electrical: Installation of electrical systems in buildings that control and monitor the railway
Alarm system: Installation of alarm systems that protect both personnel and infrastructure
Installation in tunnels: Installation of cameras, signs, distribution cabinets, handrails, lights and other necessary components in the tunnel
Fibre splicing: Reliable and secure communication using fibre
Documentation: All installations are thoroughly documented