When Lightning Struck the Solar Farm
Last summer, a 50MW photovoltaic plant in Jiangsu narrowly escaped disaster when lightning induced a 680VDC arc fault. The system’s RS308-LN 3E fuses interrupted the 9.8kA fault current within 2.3 milliseconds, saving $2.3M worth of inverters. This real-world incident showcases why engineers increasingly specify ZhongRong’s 750VDC specialist for critical protection.
Designed for DC’s Unique Challenges
Unlike AC systems where current naturally zeros, DC faults sustain deadly arcs. The RS308-LN 3E’s proprietary sand-filled ceramic body contains energies up to 150kJ, with test data showing consistent 20kA breaking capacity across 2,000+ operational cycles. Its argon-arc-extinguishing technology achieves 30% faster clearing times versus conventional designs.
EV Chargers Put to the Test
At a Shanghai charging station prototype lab, 48 RS308-LN units endured 18 months of 15A continuous load (85°C ambient) with zero premature trips. ‘The stable time-current curve matters most,’ notes lead engineer Wang Lei. ‘We’ve recorded <0.5% resistance drift after 10,000 thermal cycles.'
Redefining Compact Protection
Measuring just 10.3x38mm, this micro-fuse delivers full-range protection from 1.25xIn to 20kA. Its tin-plated copper terminals maintain contact resistance below 0.5mΩ even after salt spray testing. Over 800,000 units deployed in BESS installations show a 0.003% annual failure rate – 5x better than IEC 60269 standards.
