Finland s Complete High and Low Voltage Complete Equipment

Finland's electricity network uses a combination of high-voltage transmission lines, medium- and low-voltage distribution networks, substations, and switchboards to deliver power efficiently from generation sources to consumers.

High-

Voltage TransmissionFinland's main grid operates at 400 kV, 220 kV, and 110 kV, enabling long-distance electricity transmission with minimal losses. The high-voltage network is primarily managed by Fingrid Oyj and includes overhead lines, with some underground cables in urban areas. At the end of 2021, Finland had approximately 5,200 km of 400 kV lines, 1,400 km of 220 kV lines, and 14,750 km of 110 kV lines, along with 330 km of 110 kV underground cables.

High-voltage substations convert these voltages to medium levels for regional distribution.

Medium- and Low-

Voltage Distribution

Regional networks distribute electricity at 20 kV (medium voltage), which is further stepped down to 400 V (low voltage) for residential and commercial use. Distribution substations, which can be installed on poles, in separate structures, or in building basements, manage this voltage conversion and ensure safe delivery to end users. Low-voltage switchboards then distribute electricity within buildings and industrial facilities.

Substations and Switchboards

Substations are critical junctions where power lines of different voltages are connected. Companies like VEO Electrification provide modular substation solutions for medium and high-voltage networks up to 400 kV, offering intelligent control, protection, and distribution systems. Alfen Elkamo specializes in medium- and low-voltage switchboards, transformer substations, and related systems, supporting industrial, building, and infrastructure sectors, including renewable energy integration such as solar and wind power.

Industrial and Renewable Integration

Modern Finnish electrical equipment supports renewable energy sources and energy storage systems. Alfen Elkamo, for example, has delivered solar transformer substations for Finland's largest solar power plant, integrating solar and wind energy into the grid. Electrical engineering firms like Alten Finland provide design and automation services for electricity distribution, telecommunication, safety systems, and industrial electrification.

SummaryFinland's complete high and low voltage equipment ecosystem includes: High-voltage transmission lines (110–400 kV) and substations for long-distance power deliveryMedium-voltage distribution networks (20 kV) for regional supplyLow-voltage networks (400 V) for residential and commercial useSwitchboards and transformer substations for voltage conversion and distributionModular and intelligent substation solutions for safety, efficiency, and renewable energy integration This integrated system ensures reliable, safe, and sustainable electricity delivery across Finland while supporting industrial, commercial, and residential needs.