System The proven range of general purpose and backup Fuse-Links for nominal voltages from 3.0 kV to 40.5 kV is derived from the core competence of EFEN. All products are nationally and internationally approved. These Fuse-Links allow for reliable protection for transformers, condensers and motors and can be used for indoor, outdoor and oil-submerged applications. EFEN HH Fuse-Links are designed to limit currents within milliseconds, thus attenuating the peak value of the sine-shape current curve. The ÜLA product line controls the power dissipation of the fuse within the Fuse-Link compartments of control systems. Benefits EFEN offers a wide range of accessories for HH Fuse-Links, but also special product variants and qualified support in all matters concerning applications.