Safety is a team game

This year marks an important milestone in the development of the main grid. Both the Forest Line, the Oulujoki and North Karelia project entities will be completed and...


Behind the numbers


Biodegradable ester oil for transformers?

A high-voltage transformer in the main grid may contain as much as 100 tonnes of mineral oil, which is used as an electrical insulator and cooling medium. The environmental risks associated with transformer oils are very unlikely to be realised, but it is still necessary to make contingencies for them.

Prepared to handle disturbances

The disturbance in the electricity grid in Continental Europe last year showed how well pan-European collaboration can work.
Due to overload, Southeast Europe had too much energy, and Northwest Europe did not have enough. The situation was brought under control within half a minute and one hour later, the system was back to normal.