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Expulsion fuse-link, medium voltage
Expulsion fuse-links for medium voltage are overcurrent protection devices designed to interrupt fault currents in distribution networks. These fuses operate by generating an arc that is extinguished through the expulsion of gases, typically using a fiber tube lined with a deionizing material. They are characterized by their voltage rating (e.g....
Expulsion fuse-links for medium voltage are overcurrent protection devices designed to interrupt fault currents in distribution networks. These fuses operate by generating an arc that is extinguished through the expulsion of gases, typically using a fiber tube lined with a deionizing material. They are characterized by their voltage rating (e.g., 5.5 kV to 38 kV), continuous current rating (e.g., 10 A to 200 A), and interrupting capacity (e.g., up to 50 kA symmetrical). The fuse-link consists of a fusible element, often made of silver or copper, enclosed in a tube with internal arc-quenching materials. Key technical parameters include the minimum melting time-current characteristic, which defines the fuse's response to overloads and short circuits, and the rated breaking capacity, ensuring safe interruption under specified conditions.
These expulsion fuse-links are primarily installed in medium voltage distribution systems, including pole-mounted transformers, substations, and overhead lines. They are commonly used in utility networks, industrial power distribution, and commercial facilities to protect transformers, capacitors, and cable feeders. Their application extends to environments where reliable overcurrent protection is required, such as in rural electrification projects, mining operations, and renewable energy installations like solar farms and wind turbines. The fuses are designed for outdoor or indoor use, depending on the enclosure, and are often integrated into cutout switches or fuse holders.
Within this category, key subcategories include standard expulsion fuse-links (e.g., K, T, and H types based on speed characteristics), backup fuse-links, and full-range fuse-links. Common article codes follow patterns like "E-" or "F-" followed by voltage and current ratings, such as "E-15.5-100" for a 15.5 kV, 100 A fuse. Specific products include the "K-Series" for fast-acting protection and "T-Series" for time-delay applications. These codes often incorporate the manufacturer's prefix and the fuse's continuous current rating in amperes, along with the voltage class.
Partnering with Electric Automation Network ensures access to genuine expulsion fuse-links with real-time pricing and global express shipping. Our engineering team provides specialized technical support, including coordination studies and fuse selection based on system parameters. We offer detailed documentation per article, including time-current curves and application notes, to optimize protection schemes. With our multilingual portal, you can source these critical components efficiently, backed by expert advice for medium voltage network reliability.
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