The Complete Fuse Assembly is an all-in-one overcurrent protection solution specifically engineered for pole-mounted distribution transformers and overhead lines. Unlike purchasing separate fuse holders and links that may cause mismatching errors, this pre-assembled unit integrates the epoxy fiberglass fuse tube, silver-plated fuse element, arc quenching mechanism, and stainless steel contacts into a single, ready-to-install kit. Designed to comply with IEC 60282-2 standards, this assembly guarantees precise time-current characteristics, ensuring reliable fault interruption and preventing transformer tank explosions in rural electrification networks.
Hebei Fortis Technology Co., Ltd Product Brochure
Product Advantages
Mismatch-Free Installation: Pre-engineered matching between the fuse link and tube eliminates the risks of improper fit or incorrect spring tension, reducing field failure rates by over 30%.
High Interrupting Capacity: Capable of clearing faults up to 16kA (12.7kV) or 12.5kA (33kV), featuring a strong arc-extinguishing boric acid ester tube that ensures safe current zero-crossing interruption without violent expulsion.
Dual Protection Curves: Available in K-type (fast for transformer protection) and T-type (slow for motor/cable protection) time-current characteristics to match specific grid requirements.
OEM Flexibility: We offer customized branding, voltage rating printing, and packaging (blister card or bulk carton) for international importers and utility contractors.
Application Scenarios
In rural electrification projects or urban fringe areas, the Complete Fuse Assembly is most commonly installed on the primary side of 11kV or 33kV pole-mounted transformers. When a transformer experiences an internal winding fault or core failure, this dropout fuse assembly instantly detects the overcurrent, melts the calibrated element, and mechanically releases the tube to fall open under gravity. This provides visible break protection for linemen and isolates the faulty transformer from the main feeder line, preventing cascading outages for hundreds of households.
For protecting lateral branch lines that tap off from main transmission trunks, this fuse cutout assembly acts as the first line of defense. In a typical configuration, a 33kV rated complete fuse assembly is installed at the branch point. If a tree falls on the branch line or a vehicle hits a pole downstream, the assembly interrupts the fault current before it affects the main grid. Unlike reclosers, this economical solution requires no auxiliary power, making it the preferred choice for long, rural overhead line branches with low load density.
Power factor correction banks located on distribution poles often require protection against internal capacitor element breakdown. The complete fuse assembly is matched specifically to the inrush current and discharge characteristics of capacitors. When a capacitor unit fails short-circuit, the fuse's fast-clearing expulsion design vents ionized gases downward (away from live parts), safely disconnecting the faulty can. This prevents the risk of case rupture or dielectric fluid leakage that could contaminate the surrounding environment.
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Tel.: +86 189 3266 2725
E-mail: sale@hbfortis.com
Add.: No.8-1, Zhenxing Street, Matun Town, Zaoqiang County, Hengshui City, Hebei Province
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