Rockwill HV Fuse-links have parallel connected pure silver fuse-elements. The design and method of production of the elements ensures narrow tolerances of time-current characteristics.
The fuse elements are wound on a ceramic support and are attached to the silver plated connection caps by means of spot-welding. The connection caps are fitted inside the silver plated copper end caps by spot welding.
The copper end caps themselves are press-fitted onto the porcelain tube which is glazed inside and outside.
The end caps are furthermore mechanically fixed to the porcelain tube and additionally sealed by a durable elastic sealing medium.
This sealing method has been proven over many decades of positive field experience and ensures tightness against ingress of humidity.
It can be used in indoor system of 50/60Hz and rated voltage of 12/24/36kV.
Used together with other switch facilities such as loading switches, vacuum contactors, it can protect electric transformers and other electric facilities against overload or circuit break. It is also a necessary accessory for high-voltage switch box, circular circuit cabinet, high/low voltage top-loading transformer substation.