120kA Breaking Capacity & IEC/UL Certified

Selection depends on several factors: the continuous load current (normally 80% of the fuse rating for gL/gG), the starting current of you equipment (especially for motors), and the ambient temperature (derating factor for high temperatures). Additionally, consider the short-circuit current available in your system, and ensure the fuse’s breaking capacity exceeds this. You also need to confirm that the voltage rating matches your system voltage. As a rule of thumb, for transformer secondary windings, choose a rating about 1.5 times the full-load current. For capacitor switching applications, derate by 10% due to high inrush. Our technical team can assist you with detailed selection charts and software tools to select the optimal fuse link.

Yes, our cartridge fuse links are designed and tested to comply with both IEC 60269 and UL 248 standards. Depending on the series, they may carry the CCC mark and CE marking, which supersede national requirements in many countries. We have also obtained a metering production license, indicating our commitment to precise performance. For exports, we provide full documentation and certificates, including test reports from accredited laboratories, to facilitate customs clearance and regulatory approvals.

A fuse link is designed as a sacrificial device, so it should never need replacement unless it has operated. Under normal conditions, its lifespan can extend for decades, but environmental factors like high humidity and corrosive atmospheres may accelerate oxidation of terminals. We recommend an annual visual inspection to check for discoloration due to overheating and ensure that indicators (for striker types) are not activated. If a fuse has operated, always replace it with HRC fuse links of the same rating and characteristics. Our maintenance guideline suggests using a torque wrench with 20-25 Nm for screw-type connections to avoid micro-cracks in the terminal.