The city of Helsinki is set to install a new high-capacity electrical cable that will be the most robust of its kind in any city in Finland. This 400 kilovolt (kV) cable will connect the Sörnäinen substation to the Vanhankaupunki substation, capable of transferring electricity equivalent to the output of the Loviisa nuclear power plants combined. Meanwhile, Fingrid, Finland's national grid operator, is nearing completion of a similar high-capacity cable that links the Vanhankaupunki substation to Vantaa’s Länsisalmi. While the connection is crucial for the city's growing energy demands, concerns about safety have arisen, particularly among residents of Kirkkonummi, as such robust installations are unusual in urban environments.

The cost of this ambitious project has not been explicitly stated by Helen, the company responsible for the installation; however, it is expected to be comparable to Fingrid’s cable, which is estimated at 100 million euros. Helen’s project will require digging a tunnel at depths of 30 to 50 meters for the cable, highlighting the engineering challenges and potential risks associated with urban electrical infrastructure expansion. Although the CEO of Helen's Electrical Network was cautious about revealing how this might affect the electricity costs for regular citizens, he acknowledged that such costs would eventually be passed on to consumers.

This infrastructure development is part of Finland’s broader efforts to modernize its energy grid to accommodate growing demand and ensure sustainability. With the increasing focus on renewable energy sources and the need for reliable power distribution, projects like these reflect the nation’s commitment to secure and efficient energy solutions. While it remains to be seen how these developments will impact local residents economically and environmentally, their necessity underlines the evolving landscape of energy infrastructure in Finnish cities.