Photovoltaic Fuse Link Overview
The GRL DNPV1038 is a cylindrical 10×38 mm DC photovoltaic fuse link designed for industrial-grade solar PV protection. This gPV-class fuse link provides fast-acting overcurrent and short-circuit protection for string-level circuits in 1000 VDC solar systems. It is ideal for photovoltaic (PV) combiner boxes and DC distribution panels in rooftop or utility-scale PV arrays. By interrupting only the faulty string (“selective fusing”), the DNPV1038 ensures the rest of the solar array continues operating while isolating faults. As a high-reliability solar fuse link, it safeguards solar modules and downstream electronics against overloads in harsh outdoor conditions.
Photovoltaic Fuse Link Features
The DNPV1038 fuse link uses a ceramic-body, fast-blow design for reliable DC protection. Its precision fuse element is housed in a sand-filled ceramic tube, which quenches DC arcs quickly (no AC zero-cross). The ceramic construction offers excellent high-temperature stability and insulation. The ends are tin-plated copper alloy for corrosion resistance and secure electrical contact. Key features include:
Photovoltaic Fuse Link Advantages
GRL’s DNPV1038 offers industrial-quality protection and selective fault clearing for solar arrays. It is specifically engineered to exceed standard fuse characteristics for photovoltaic use.
Key benefits include:
Photovoltaic Fuse Link FAQs
1、What does a fuse link do?
A fuse link contains a fusible element that melts when current exceeds its rating, interrupting the circuit to prevent fire or equipment damage. In solar systems, the PV fuse link offers selective protection—only the faulty string is disconnected, keeping the rest of the system online.
2、 What is a PV fuse?
A PV fuse (photovoltaic or solar fuse) is specially designed for solar power systems. It is rated for high DC voltage (up to 1000–1500 VDC) and uses a ceramic body with sand to quench DC arcs. PV fuses meet gPV classification (IEC 60269-6) for guaranteed solar application safety.
3、How do you choose the right fuse link?
Select a fuse rated slightly above the maximum normal operating current of your PV string (taking into account the worst-case array current). It must match the system’s DC voltage (1000 V here), fuse size (10×38 mm), and be a gPV type for DC. Always consult the PV array design and use the manufacturer’s datasheet to confirm compatibility.
4、Is there a difference between AC and DC fuses?
Yes. Unlike AC, DC circuits have no zero-voltage crossing, so a DC-rated PV fuse must extinguish a continuous DC arc. PV fuses are specifically constructed (e.g., sand-filled ceramic, gPV-rated) to interrupt high-voltage DC safely. An AC fuse may not reliably clear a DC fault, so always use a DC/solar-rated fuse like the DNPV1038 for solar applications.
By providing clear overcurrent protection in DC solar circuits, the DNPV1038 fuse link plays a critical role in PV system safety and reliability. Its design and certifications ensure it meets the stringent demands of modern PV installations.
