Ferraz Shawmut Medium Voltage Current-Limiting Fuse 9F60HNJ100

The Ferraz Shawmut 9F60HNJ100 is a high-performance medium voltage current-limiting fuse designed for protecting electrical systems in industrial and utility applications. This E-rated fuse operates at a maximum voltage of 25.8 kV and a current rating of 100E amps, making it ideal for safeguarding potential transformers, feeders, and distribution circuits from overcurrent and short-circuit faults. Its double-barrel design enhances reliability and interrupting capacity up to 25 kA symmetrical, ensuring minimal downtime and equipment damage during faults. Key features include a robust construction with boric acid expulsion technology for efficient arc quenching, compatibility with standard fuse clips, and operation at 60 Hz. Advantages over similar products include superior current-limiting characteristics that reduce let-through current, protecting downstream equipment better than non-current-limiting fuses. Drawbacks may include higher initial cost and the need for precise matching to system voltage. This fuse is commonly used in power distribution, substations, and industrial plants. Based on image analysis, the unit appears to be in used condition with some surface oxidation on brass ends but no major damage, suggesting it could be refurbished or surplus stock. For detailed specs, refer to Mersen's official datasheets (formerly Ferraz Shawmut).