Fuse holder
Electrical fuses are used extensively in electrical networks in order to protect the electrical equipment in the network from damage caused by surges through the system, generally occasioned by short-circuits or overloads. A fuse holder is a device for retaining an electrical fuse in a wired circuit. Electrical fuse assemblies having a fuse holder for insertion into a fuse housing are in widespread use. The fuse link or fuse, the actual protection element, is accommodated in the fuse holder such that it can be replaced. A standard fuse holder is comprised of a barrel, a cap, and means for electrically connecting the fuse holder and fuse, which the fuse holder retains, to an electrical circuit. A fuse holder includes a fuse carrier or fuse-carrier unit mounted within a receptacle or receptacle unit. In use, a fuse carrier bears an elongated fuse which has a pair of terminals. The fuse carrier releasably disposes the terminals for each fuse in tight electrical engagement with companion contacts of the receptacle. The fuse holder operates by electrically insulating the fuse from the environment exterior the fuse holder while creating an electrically conductive circuit from one terminal, through the fuse holder and fuse, to the second terminal. One type of such fuse is housed within a fuse holder designed specially for electrical equipment such as transformers and primary switch/fuse modules serving pad mounted and underground service applications. This type of fuse holder is an externally operated design which accommodates the small space typically available with pad mounted and underground equipment.
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