Solar Fuse Link Overview
The GRL DNPV1485 is a 14×85 mm DC solar fuse link optimized for 1500 V photovoltaic systems. Combining high voltage capability with higher current, it is rated from 12 A to 50 A. This larger fuse link protects medium to high current PV strings in utility-scale or industrial solar arrays. As a gPV-class solar fuse, the DNPV1485 interrupts overloads and short circuits in 1500 VDC circuits, safeguarding both the PV modules and downstream equipment. Its robust design reflects GRL’s industrial-quality standards, ensuring long-term reliability in demanding environments.
Solar Fuse Link Advantages
Solar Fuse Link Applications
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1500 V PV Combiner Boxes: Ideal for large installations, each PV string up to 50 A is fused with DNPV1485 links.
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PV Inverter Inputs: Acts as the main DC fusion on 1500 V inputs or intermediate DC distribution.
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Battery Storage: Applicable in high-voltage battery systems (up to 1500 V) requiring overcurrent protection.
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Renewable Energy Plants: Suitable for other renewable DC applications (e.g., hydroelectric DC bussing).
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Any 1500 VDC Solar System: Inverters, off-grid systems, or microgrids running at elevated DC bus voltages.
In all cases, the DNPV1485 ensures safe operation by isolating faults. For example, if one string develops a short, its 1500 V fuse link will blow and leave other strings running.
Solar Fuse Link FAQs
1、What does a fuse link do?
It serves as an overcurrent protection device. When the current exceeds the fuse rating, the link melts and breaks the circuit. In a PV array, this means only the faulted string is isolated, allowing others to keep generating power.
2、What is a PV fuse?
A PV (photovoltaic) fuse is specially designed for solar power circuits. It must interrupt high DC voltages without AC zero crossings. The DNPV1485 is a PV fuse rated for up to 1500 VDC, using a ceramic-sand design to quench arcs safely.
3、How do you choose the right fuse link?
Match the fuse to the system’s voltage (1500 V here), and select the fuse amperage at or slightly above the string’s maximum current. The fuse’s dimensions (14×85) must fit the holder. Always use gPV-rated fuses for solar to comply with UL/IEC standards.
4、Is there a difference between AC and DC fuses?
Yes. DC fuses (like the DNPV1485) must handle constant DC. They incorporate internal features (sand-filled ceramic) to quench the arc without AC cycles. AC fuses rely on alternating current’s natural zero-crossing to extinguish arcs, so they are not suitable for pure DC circuits. Always use a fuse specifically rated for DC/solar use in PV systems.
The DNPV1485 fuse link is a critical component in high-voltage photovoltaic protection, combining GRL’s quality manufacturing with specialized PV fuse design. Each unit comes with a detailed PV fuse datasheet to assist engineers in the correct selection and installation.
