Keskijänniteverkossa

Keskijänniteverkko refers to the medium voltage electricity distribution network used in Finland and other Nordic countries. This network typically operates at voltages between 10 kilovolts (kV) and 36 kV. It serves as the crucial link between the high voltage transmission system and the low voltage distribution network that supplies electricity to individual homes and businesses.

The primary function of the keskijänniteverkko is to efficiently transport electricity from substations, where the voltage is stepped down from the transmission level, to local distribution points. These points often include smaller substations or pole-mounted transformers that further reduce the voltage to the levels used by end-consumers, commonly 400/230 volts.

These networks are characterized by overhead lines supported by wooden or concrete poles, as well as underground cables. The design and layout are optimized to minimize energy losses during transmission over moderate distances. Maintenance and upgrades of the keskijänniteverkko are essential for ensuring a reliable and stable electricity supply. They are managed by regional electricity distribution companies, which are responsible for their operation, expansion, and repair. The resilience of the keskijänniteverkko is vital for the functioning of society, impacting everything from residential power to industrial operations.