The DNPV2XL-S5D is built to withstand extreme electrical and environmental stresses, ensuring long-term operational integrity.
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Optimized Construction for High DC Voltage
Solar Fuse Link Advantages
The choice of the DNPV2XL-S5D translates directly into long-term efficiency and system security.
Uncompromised PV-Optimized Protection
- Precise Fault Isolation: The gPV characteristic curve is engineered to avoid nuisance tripping, operating reliably only when the current exceeds 1.35 times the rated current and guaranteeing non-operation below 1.13 times. This precision is paramount for maintaining system uptime.
- Absolute Reliability: The protection mechanism relies on the robust Joule effect, meaning the characteristics of the fuse do not suffer any degradation over time, providing consistent, guaranteed protection throughout the system’s lifespan—a crucial factor for assets requiring decades of reliable service.
- Superior Breaking Capacity: The 50kA breaking capacity ensures safe and effective clearing of maximum short-circuit currents in the most powerful 1500V arrays.
Operational Efficiency and Cost Reduction
- Energy Efficiency: The exceptionally low power dissipation minimizes continuous energy waste, ensuring maximum power delivery to the grid. This also translates into reduced thermal stress on components within the combiner box.
- Ease of Integration: The knife-type contactor design facilitates rapid installation and secure connection within standardized fuse bases.
As a dedicated Exporter and leading Producer of these high-specification components, GRL offers competitive PV fuse link price solutions and volume capabilities to support major infrastructure projects across all continents.
Solar Fuse Link Applications
The DNPV2XL-S5D series is the go-to solution for high-current protection in critical segments of the PV system.
Essential Circuit Protection
This photovoltaic fuse link is widely deployed for high-capacity protection functions:
- PV Combiner and Re-Combiner Boxes: Protecting the aggregated currents from multiple parallel strings before they reach the inverter.
- Inverter DC Inputs: Safeguarding the DC input terminals of central and large string photovoltaic inverters.
- Utility-Scale and Commercial Arrays: Ideal for large-scale power aggregation points in massive solar parks and substantial commercial and residential use rooftop systems.
Addressing Installation FAQs for Global Engineers
Two critical questions frequently arise regarding basic PV circuit safety:
- Do solar panels need fuses? Yes, solar arrays require fuses for protection against reverse current. If a fault occurs in one PV string, the healthy strings connected in parallel will feed potentially destructive reverse current into the faulty string. If this reverse current exceeds the panel’s maximum series fuse rating, a gPV fuse is mandatory to safely isolate the faulty string and prevent fire or component damage.
- Where should the fuse be located in a solar system? Solar fuses are typically placed in the PV combiner box or disconnect unit. For isolation purposes, they are strategically placed on the positive and/or negative poles of each string or array input to provide granular isolation capability before the power is aggregated at the inverter.
Engineers must also consider how to size the PV fuse link correctly. The fuse’s current rating must be calculated based on the Maximum Continuous Circuit Current multiplied by a safety factor, typically 1.25. Furthermore, the 1500V DC voltage rating must comfortably exceed the system’s maximum Open Circuit Voltage under the coldest conditions to prevent dangerous DC arcing during fault interruption. This technical detail is why GRL emphasizes the use of specialized gPV fuse link products over standard DC fuses.
Solar Fuse Link FAQs
1、What is the significance of the 2XL size designation?
The ‘2XL’ refers to the physical size and corresponding current capacity of the PV fuse link. This size is engineered to handle rated currents from 125A up to 400A, placing it firmly in the category for primary array and inverter protection in large high-voltage PV fuse link installations.
2、How does the DNPV2XL-S5D compare to a DNPV2XL-S5N or S5R?
All three models share the same electrical specifications (1500V, 125A–400A, 50kA breaking capacity). The difference lies in the installation form code: ‘D’ indicates a Knife type fuse contactor for plug-in mounting, ‘N’ indicates a Hook type connection, and ‘R’ indicates a Spiral connection type, offering flexibility for various PV combiner box fuse link designs.
3、Why are GRL’s fuses recommended for hot climates (Asia, Africa)?
GRL’s DNPV2XL series features industry-leading low power dissipation. Less heat generated by the fuse itself means lower operating temperatures inside the enclosure, which dramatically reduces the need for complex cooling systems and extends the lifespan of sensitive electronic components, making them ideal for the high ambient temperatures common in these regions.
4、Where can I obtain complete technical specifications or a quote?
The complete product catalog, the full 1500V PV fuse link catalog PDF, and the PV fuse link datasheet are available for download on the GRL website. Contact GRL’s sales team directly if you are looking where to buy PV fuse link products and require a competitive PV fuse link price.
