Isolate Switch 1.Type:FZN25 2.Standard|:IEC GB 3.Main Material:Procelain&Steel Overview FZN25, FZRN25 vacuum load switch combination units, ... for load control and short circuit protection purposes, load switch division and load, closed Loop current, no load transformer ... of transmission, interr upter only when closing and withstand high pressure breaking the moment, so small and light weight. FZN25, ...