A fuse link used in alternate current medium- or high-voltage systems with a current frequency of 50 Hz includes a spring-type striker pin and is designed for the protection of electrical devices against consequences of short circuits and overloads. A porcelain housing with a star-core, external end caps closed by plugs, star-core end caps with a ring-shaped first tap designed to ensure electric contact between the star-core end cap and the external end cap of the fuse link is also included. A spring-type striker pin is positioned along the axis of the star-core. Each of the end caps of the star-core is provided with an additional second tap designed to centre the star-core relative to the axis of the fuse link. The spring-type striker pin is centred along the longitudinal axis of the fuse link.

A terminal holding part 30 is provided in a battery pack mounting section of the electrical device. The terminal holding part 30 has a machine-side first positive electrode terminal 32, a machine-side second positive electrode terminal 33, a machine-side first negative electrode terminal 34, a machine-side second negative electrode terminal 35, and machine-side signal terminals 36. A fuse unit 40 is detachable from the terminal 32 and terminal 34. The fuse unit 40 includes: a fuse 41 connected between the terminal 32 and the terminal 34; a first conductor 49, one end of which is connected to one end of the fuse 41, and the other end of which is detachably connected to the terminal 32; and a second conductor 50, one end of which is connected to the other end of the fuse 41, and the other end of which is detachably connected to the terminal 34.