New Dual-Element Current-Limiting Power Fuse with Full Protection Capability Against any Fault Current

A newly developed current-limiting fuse , called the universal fuse , has dual fuse-elements connected in series: one is made of gold-silicon alloy with a low melting point and covered with polytetrafluorethylene arc-extinguishing tube , and the other is an ordinary ribbon-like silver element . The gold alloy element performs for low-current interruption , and the silver one , principally for high-current interruption . This fuse can be applied for reliable protection against a full-range fault current from a minimum fusing current to a heavy short-circuit fault current . It has such practically excellent properties as low temperature rise , high reliability against short-time and long-term deteriorations , and feasible protection co-ordination.