middenspanningskabels

Middenspanningskabels are electrical power cables designed for medium-voltage distribution networks, typically rated from 1 kV to 35 kV AC (in some contexts up to 52 kV). They are used to transmit electricity from substations to feeders or large industrial loads, often routed underground in urban areas or within cable ducts.

A middenspanningskabel generally comprises a conductive core (copper or aluminum) and insulation (commonly XLPE or EPR; older designs may use paper insulation with a lead sheath). Many cables include a semi-conductive shield and a metallic screen, and may have a protective outer jacket of PVC or HDPE. Some constructions employ steel armour for mechanical protection in direct-burial or trench installations. Variants exist for indoor, outdoor, direct-burial, and duct routing, with differences in armour, shielding, and jacket materials.

There are several types of middenspanningskabels, including polymeric-insulated cables and older paper-insulated lead-sheathed designs. Armoured cables provide mechanical protection in harsh environments, while unarmoured versions suit controlled spaces. Joints and terminations are specialized components essential for safe operation and reliable performance.

Applications include urban distribution networks, substations, industrial plants, and street cabinets. Benefits of middenspanningskabels include reduced visual impact and increased reliability in congested areas, while challenges encompass installation complexity, moisture ingress risk, thermal management, and the need for specialized testing and maintenance.

Standards and testing typically reference IEC 60502 (and related EN/IEC standards) for polymeric insulated MV cables, covering rated voltage, construction, and performance. Quality assurance includes insulation resistance testing, partial discharge monitoring, and appropriate outdoor/underground installation practices.