New Application Flexibility for Medium-Voltage Current-Limiting Fuses

Developments in the analysis of current-limiting fuse operation have resulted in new designs of fuse becoming available. These designs are compared to earlier types, and new methods of construction are discussed. These include the use of nonsilver fuse elements and new fuse filler techniques. New methods of testing motor circuit fuses are explained, and fuse application techniques in general are covered. The area of transformer through-fault protection, to be addressed in a forthcoming ANSI Guide, is also considered. A brief discussion of future developments in fuse technology is also given.