Electric fuse - definition of
Electric fuse - definition of
Electric fuse is an element of protection electrical installations installations and equipment against the effects of excessive current, which could lead to overheating of the Cables, damage to apparatus or the start of a fire. It works on the principle of controlled interruption of a circuit by melting a thin conductor (fuse wire) placed inside the enclosure, when the current exceeds a predetermined limit.
The primary purpose of a fuse is to provide protection against short-circuits and long-lasting overloads, while minimising the risk of damage to the protected system. The performance characteristics of a fuse, determined by the response time and rated current, must be adapted to the parameters of the specific application, in order to ensure selectivity of protection and reliable cutting off of the faulty circuit with minimum impact on the Others elements of the installation.
Others fuses come in a variety of designs and standards, including cylindrical fuses, knife-type fuses or micro-fuses used in electronic devices. In modern power systems, fuses with fast or delayed action characteristics are increasingly used, allowing precise adaptation of protection to load dynamics.
Materials used in the manufacture of fuses, such as lead-tin alloys-lead alloys, silver or copper, are selected for their predictable melting and arc-extinguishing properties arc, that arises when a circuit is interrupted. In installations high voltage installations fuses are often filled with quartz sand, which absorbs the energy of the arc and accelerates the extinction of the discharge. In energy safety management systems, the correct selection and location of fuses is an important part of protecting the infrastructure and ensuring the continuity of the electricity supply.
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