Knowledge
Medium- and low-voltage networks, explained from the ground up
Practical articles on how MV cable lines, transformer substations and renewable grid connections are built in Poland. Written for investors, contract engineers and anyone who wants to understand what happens on a power-network site.
Articles
Guides and technical articles
Each article covers its subject in general, accurate terms and, where relevant, refers to projects we have completed and our clients have confirmed in reference letters.
MV cables XRUHAKXS and NA2XS(F)2Y — construction, designations and use
What a single-core medium-voltage cable is made of, how to read its designation and what “1×150/25 mm²” actually means.
Why distribution operators are replacing MV overhead lines with cables
Reliability, resilience to storms and icing, forests and safety — and how undergrounding a line works in practice.
How horizontal directional drilling (HDD) works
Pilot bore, reaming, pullback and the role of bentonite. When directional drilling is the best choice and where its limits lie.
Inside an MV/LV transformer substation
Pole-mounted and packaged substations, MV switchgear, the transformer, LV switchboard and earthing — what is inside and what it does.
Connecting a solar farm to the MV grid
The investor's path from the application for connection conditions to acceptance, plus the technical elements of a PV farm connection.
From design to acceptance — the stages of building an MV cable line
Design, approvals, site preparation, earthworks, installation, testing, as-built survey and handover to the operator.
Shortcuts
Useful pages
Power-network glossary
More than 60 terms, from MV and LV through GPZ, ZKSN and cable joints to connection conditions and solar farms.
Learn more ServicesWhat we build
MV cable and overhead lines, MV/LV substations, directional drilling, fibre ducts and renewable grid connections.
Learn more ProjectsProjects with reference letters
Five contracts for ENEA Operator, ZILINSKIS and PIWOWARSKI — with scope, cable types and dates.
Learn moreHave a question about a specific project?
Describe the scope of works and we will prepare a quote and schedule — or suggest where to start.