DC Fuse

A KRIPAL DC Fuse is a critical safety component specifically designed to protect residential and commercial solar power systems from overcurrent and short-circuit faults. It acts as a weak link that safely interrupts the circuit by melting when excessive current flows, preventing damage to expensive equipment like inverters and wiring. Its high cost-performance ratio makes it a vital and economical investment for system safety and reliability.

DC circuits, unlike AC, lack a natural current zero point, making it much harder to extinguish the electrical arc that forms when a fuse blows. KRIPAL DC Fuses are engineered with special arc-quenching technologies (e.g., specific filler materials) to safely and forcefully extinguish the DC arc. Using an AC fuse in a DC application can lead to a failure to clear the fault, resulting in a persistent arc, fire, or explosion.

• PV-Optimised Voltage & Current: Rated for DC 1000V with a conventional free-air thermal current of up to 80A, perfectly matching residential and commercial system requirements.
• Compact Design: Saves space in combiner boxes and distribution panels.
• Blown Fuse Indicator: Features a built-in indicator for immediate visual detection of a tripped fuse, simplifying maintenance and troubleshooting.
• Certified Safety: CE certification ensures compliance with international safety standards.

• Frame Size (UKRT18PV-32, 63, 125): This generally relates to the current rating the fuse base can support. Choose the frame size that corresponds to the amperage requirements of your circuit.
• Rated Current: The fuse-link itself (e.g., a gPV type) must have a current rating suitable for the specific string or circuit it protects, typically 1.25 to 1.56 times the maximum continuous current.
• Number of Poles (1P, 2P, 3P): A 1P fuse is used to break a single line (e.g., positive). 2P fuses break both positive and negative lines, providing more complete isolation and are highly recommended for enhanced safety in PV systems.

A gPV fuse-link is a type of fuse specifically designed for photovoltaic applications. The "gPV" classification means it provides full-range protection—it can safely break both overload currents and high short-circuit currents. Using KRIPAL's dedicated gPV fuse-links ensures optimized performance and maximum safety for your solar installation.

• Inside PV Combiner Boxes: Protecting individual PV strings from reverse currents and faults.
• At the Inverter DC Input: Serving as the main overcurrent protection for the inverter.
• In DC Distribution Boards: Protecting various branches of the DC system.

If the built-in indicator shows the fuse has blown (1. Ensure the system is completely powered down from both the PV array and the grid/battery. 2. Investigate and identify the root cause of the overcurrent, such as a short circuit or ground fault. 3. Replace the fuse-link only with an identical, KRIPAL-approved gPV type of the same voltage and current rating. Never replace a fuse with a higher amp rating.