Mellomspennning

Mellomspenning, literally translated as "medium voltage" from Norwegian, refers to a range of electrical potential generally used for power distribution. The specific voltage levels considered "medium" can vary by region and application, but typically fall between low voltage (like that found in homes) and high voltage (used for long-distance transmission). In many electrical grids, medium voltage serves as the intermediate step between the bulk power transmitted at high voltages and the lower voltages delivered to end-users.

This voltage class is commonly employed for distributing electricity from substations to local areas, industrial facilities, and commercial buildings. Networks operating at medium voltage are often characterized by overhead power lines, underground cables, or a combination of both. The equipment used in these systems, such as transformers, switchgear, and circuit breakers, is designed to handle these intermediate voltage levels safely and efficiently.

The choice of medium voltage is a balance between the economic advantages of lower voltage transmission and the technical limitations of very low voltages. It allows for a reasonable compromise in terms of conductor size, power loss, and insulation requirements for distribution networks. By stepping down high transmission voltages to medium voltages at substations, the energy can be more practically and economically delivered to a wider area before a final step-down to the standard low voltages used by consumers.