Fuse for use in switch disconnector, has conducting solder fusible in event of prolonged elevation in temperature at level of striker unit, where softening or fusion of solder slackens tensile stress on spring

摘要

The fuse has a central bar arranged in a tubular body along a longitudinal axis of the tubular body. A conducting fuse-element is arranged on the bar, and extends between longitudinal ends (1a) of the fuse. A releasing wire (121) is fusible in case of electric over current. A conducting solder is fusible in an event of prolonged elevation in temperature at a level of a thermal striker unit i.e. thermal striker (110), where softening or fusion of the solder slackens tensile stress (Ft) on a spring (116). The solder is made of an alloy of tin and silver or copper. An independent claim is also included for a switch disconnector comprising a fuse.