The KTK-15 is a non-indicating fast-acting supplemental electrical fuse designed to open when exposed to a short circuit or overload condition.  The KTK-15 is commonly used in control circuits, lighting circuit protection, and meter circuits.  The KTK-15 is constructed from nickel-plated bronze endcaps and melamine tube.  The electrical ratings for this fuse are 15 Amps, 600Vac, and an Interrupt rating of 100kAIC at 600Vac.  A common part number for this fuse is 892583.  The fuse is typically installed in a properly rated electrical fuse block and is cylindrical with dimensions of 1.5 in X 0.41 in and a weight of 0.18 lb.  The country of origin is Mexico.