The product is used in overload or short-circuit ptotection for electric transformer, the current limiting means that the fuse will cut off the circuit before the short-circuit current reaches the peak value.Current which passes the fuse when being 3 times of its specified electric current. Do not fusing for an hour;When the current through the fuse is 2 times of its specined electric current, fusing in an our;Refer to its fusing feature curve in chart 1 when select the fuse.