The DMS-MDO medium-heavy range is monoblock up to 3000 kgs. All the advantages of monoblock, safety, reliability and easy servicing, can be found also in this range. In addition, in this range of large monoblocks, Socomec technicians have developed a new system to eliminate harmful blank firing protecting further the breaker and allowing an immediate start. We do not exclude that the MDO 4100 and MDO 6000 breakers will soon become monoblock, but for the moment they are still equipped with our innovative patented tie-rod clamping system, which gives them greater elasticity, strength and durability. These two models maintain the exclusivity of being able to remove piston and bushes without having to loosen the tie rods.