Primary Expulsion Fuse Cutout

Primary expulsion fuse cutouts are a type of protective device used in electrical systems to protect against overcurrents. They are classified under the supply class Fuses, Arrestors, Absorbers, and Protectors in the supply group Electrical and Electronic Equipment Components.

Primary expulsion fuse cutouts consist of a fuse element enclosed in a porcelain or polymer housing. They are typically installed on overhead power distribution lines and are designed to interrupt the flow of current in the event of a fault or overload. When the current exceeds a certain threshold, the fuse element melts, creating an arc that is expelled from the housing. This expulsion of the arc helps to quickly extinguish it and prevent further damage to the electrical system.

Primary expulsion fuse cutouts are commonly used in distribution networks to protect transformers, lines, and other equipment from overcurrents. They are designed to be easily replaceable, allowing for quick restoration of power after a fault. These devices are an essential component in ensuring the safety and reliability of electrical systems.