This series of fuse bases are used in AC 50Z rated voltage up to 690v, rated curent up to 1250A and is equipped with fuses for protecting from overloadandshort-crcuit in electric crcuit The base adopts high strength ceramic and possesses wel enough nsuation performance. The open structureis featured with goodheat radiating, high mechanica density and simple operation.The outine structure andinstalation dimension conform to lEC60269,VDE0636 and GB13539,