Galaxy Fuse Empowers Precise Selection—Enhancing PV System Safety

In the direct current (DC) side of photovoltaic (PV) arrays, fuses must withstand continuous voltages up to 1500 VDC while providing millisecond-level response during short-circuit faults to prevent fires and equipment damage. Galaxy Fuse’s two products—the 1500VDC 63A 14×65mm Solar PV Fuse Link and the 1500VDC 630A 3L Solar PV Fuse Link—comply with international standards including IEC 60269-6:2010+A1:2021 (IEC Official) and UL 248 “Fuses for Photovoltaic Systems” (UL Reference), delivering reliable protection across various installation scenarios.

For ground-mounted distributed PV systems or rooftop small-scale PV grids, the 1500VDC 63A 14×65mm Solar PV Fuse Link is particularly valued for its compact 14×65mm cylindrical body, which helps save installation space while offering a wide current selection from 10A to 63A to meet the needs of string-level overcurrent protection (typically 1.25 times the string current). In field applications such as module-level string boxes, installing this fuse at the end of each PV string effectively isolates faults at the string level, preventing "dark strings" from dragging down the performance of the entire array. Under standard testing conditions, it achieves an impressive 25 kA DC breaking capacity (UL 248-19 certified), ensuring rapid disconnection of the fault current when short circuits occur due to panel or wiring errors.

When it comes to large-scale ground-mounted power plants or centralized combiner boxes, the 1500VDC 630A 3L Solar PV Fuse Link becomes the ideal choice. Its YRPV-630D model offers current ratings ranging from 315A to 630A, perfectly matching the output requirements of megawatt-level PV battery strings. The 3L standardized size ensures seamless compatibility with mainstream busbar systems, allowing for fast installation, maintenance, and replacement. Deployed in combiner box main circuits, this fuse provides a critical first level of fast protection, capable of breaking 50 kA DC fault currents within milliseconds, thanks to its L/R = 3 ms time constant. Its reinforced terminal structure and ceramic casing not only resist high temperatures and arc effects but have also passed multiple certifications including CE and RoHS, ensuring both mechanical strength and long-term reliability. Additionally, the built-in visual status indicator offers immediate fault identification, significantly reducing maintenance time on site.

Whether constructing distributed small stations, integrating combiner boxes, or streamlining operations and maintenance, these two fuse models—1500VDC 63A 14×65mm Solar PV Fuse Link and 1500VDC 630A 3L Solar PV Fuse Link—enable a comprehensive overcurrent protection solution from string level to busbar level, all while meeting the rigorous demands of IEC 60269-6:2010+A1:2021 and UL 248 standards. With outstanding electrical and mechanical performance, Galaxy Fuse products safeguard the safe and efficient operation of PV energy storage systems, providing users with greater confidence and system stability.

For further technical support or customized solutions, please feel free to contact Galaxy Fuse.