The item is in overload or brief-circuit protection for elctric transformer. The current restricting implies that the fuse will cut off the circuit prior to the shortcircuit current reaches the peak benefit. 
Fusing attribute: 
Recent which passes the fuse when getting 1.3 moments of its specified electric powered recent, Do not fusing for an hour When the present by means of the fuse is two moments of its specined electrical existing, fusing in an hour Refer to its fusing feature curve in chart one when pick the fuse.
Framework of fuse website link
The fuse pipe is the primary part of fuse,it is created by putting in the fuse wire in the porcelain pipe,filling the quartz sand in the porcelain pipe and sealing to-finishes of pipe.For the fuse pipe with rated present under seven.5Aand 35V rated voltage,its fuse wire is rolled on the specific por-
celain main,referening to chart 2.a.for the fuse pipe with rated current previously mentioned seven.5A,its fuse wire is cling in the porcelain pipe,referening to the chart.