Traction transformer

A transformer, comprising:

• an enclosure with a first cover and a second cover arranged at opposite ends of the enclosure, having an enclosed volume comprising an isolation material, the enclosure comprising at least one channel which extends through the enclosure from the first cover to the second cover, wherein the interior of each of the at least one channel is separated from the enclosed volume,
• a core provided outside of the enclosed volume, comprising at least one leg and at least one yoke, wherein the at least one leg extends through the interior of the at least one channel,
• at least one coil provided inside the enclosed volume and being wound about the at least one channel, and
• wherein the first cover and the second cover each comprise an electrically insulating material and at least one electrically conductive component;
• and
• wherein the electrically conductive component comprises at least one of the following:
• a layer of conductive material;
• a conductive paint coating or a thin film metal coating;
• a matrix of conducting particles, which is embedded in the electrically insulating material;
• a metallic grid, which is embedded in the electrically insulating material or which is coated on a surface of the electrically insulating material;
• and
• wherein the at least one electrically conductive component of the first cover and the at least one electrically conductive component of the second cover are each grounded via at least one ground contact per cover, each of the electrically conductive components thereby grounding a whole surface of each of the first and second covers.