Compact, reliable, and maintenance free: With the superior vacuum technology for on-load tap-changers from Maschinenfabrik Reinhausen (MR), distribution transformers can now be regulated. They maintain a constant voltage in public, industrial, and private distribution grids by compensating for fluctuations in the medium and, if necessary, high-voltage levels and responding dynamically to changes in the feed-in and demand at the low-voltage level.