Technical instructions for the electricity network
Within Herrfors Nät-Verkko’s distribution area, contractors must comply with the up-to-date technical requirements and instructions when connecting to the electricity network or carrying out modification work. On this page you will find all the necessary documents and instructions related to the low- and medium-voltage network.
Common practices ensure safety and smooth operations
The instructions include, among other things:
- Connection requirements (for low- and medium-voltage networks)
- Connection diagrams and example connections
- Principles of metering and connections
- Protection requirements (e.g. main fuses, overcurrent protection)
- Construction requirements (placement of switchboards, cabling)
- Conditions and documentation for commissioning inspections
The objective is:
- A safe and standard-compliant connection to the network
- Smooth compatibility with measurement and control systems
- Ensuring common practices regionally
Download the instructions
Technical principles for low-voltage connections
Current transformer dimensioning
Connection cable recommendations
Contact technical customer service
If you need more information or guidance in an exceptional situation, please contact our technical customer service.
