Omexom Expands Northern Sweden’s Electricity Infrastructure with PT99 Transformer Station
Demand for reliable electricity infrastructure is rising in northern Sweden as energy-intensive industries, including mining, continue to expand. A stable and powerful power supply is crucial for the reopening and development of the Viscaria Mine in Kiruna.
Meeting the increasing demand for reliable electricity infrastructure needs requires a stronger local grid, one built with modern infrastructure that can withstand the region’s harsh Arctic conditions while keeping critical industrial facilities reliably powered.
To address this need, Omexom is constructing the PT99 Viscaria 130 kV transformer station in Kiruna. The project is part of the ongoing modernization and expansion of the electricity network in northern Sweden.
What is a Transformer Station?
A transformer station, also known as a power substation, is a key element of the electrical grid. It steps up electricity from one voltage level to another so that power can be transmitted efficiently over long distances and then stepped down safely at industrial facilities, businesses and communities. Besides stepping the voltage up and down, a transformer station also monitors power flow, defends the grid against faults and ensures stable and reliable power distribution.
Scope Of the Turnkey Contract
The project scope includes the construction of a new transformer station that will be equipped with air-insulated 130 kV switchgear, as well as the installation of EK battery systems, control and protection relay systems, telecommunications and communication equipment, as well as station power supply systems that will ensure the continuous operation of the facility.
A new control building will also be constructed, while the facility will be connected to the existing overhead transmission line network.
The project is being delivered as a turnkey contract, with Omexom responsible for the full scope of work, from engineering and design through construction and commissioning. The project commenced in February 2026, and commissioning is slated for Q3 2027.
As part of the project’s framework, Omexom is also working in association with Actemium, a sister brand within VINCI Energies network, thus ensuring the efficient execution of the project and access to extensive technical expertise.
Once the new transformer station is built, it will be able to supply the Viscaria mine with 45 MW of power, thus ensuring the electricity supply that the mine needs to be fully operational. The new facility will be designed to offer the necessary reliability and performance, especially since the climate in northern Sweden is quite challenging.