Fuse cutouts are essential protective devices used in power distribution networks to safeguard equipment from overcurrents and short circuits. Polymer fuse cutouts are typically classified into various types based on their voltage rating and application, including polymer cutouts, porcelain cutouts, and expulsion-type cutouts. These devices are commonly installed in outdoor substations and along overhead lines to protect transformers, capacitor banks, and other electrical components. Fuse cutouts not only provide overcurrent protection but also serve as a visible disconnect point, enhancing system reliability and safety in energy distribution.
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In electrical power distribution lines, a fuse cutout—also known as a cut-out fuse or simply a cutout—is a protective device that combines a fuse and a switch. A widely used variant is the polymer fuse cutout, which offers enhanced durability, insulation, and weather resistance in outdoor applications.
Used on overhead transmission lines and taps to protect distribution transformers from current surges and overloads,An overcurrent caused by a fault in the transformer or user circuit can cause the fuse to melt and the switch mechanism to visibly open,Disconnect the transformer from the line. The device can also be opened manually by a utility line worker standing on the ground and using a long insulating rod called a "ground rod."
