How Do 1500VDC Photovoltaic Fuses Work?

The working principle of the 1500VDC photovoltaic fuse is based on the current overload protection mechanism. When the current in the circuit exceeds the predetermined value, the fuse will melt due to overheating, thereby cutting off the power supply and preventing the electrical equipment from being damaged due to overload.

The specific working process is as follows: The fuse is mainly made of metal materials, and contains some small bubbles or voids inside. These bubbles or voids make the melting point of the fuse lower than the melting point of the metal material. When the circuit is working normally, the voltage difference between the two ends of the fuse is very small, and the current passing through is also very small, so the fuse will not melt. However, when a large current passes through the circuit, the fuse will generate heat. Due to the bubbles or voids inside the fuse, the heat conduction performance is poor, causing the local temperature of the fuse to rise rapidly. When the temperature reaches the melting point of the fuse, the fuse will melt, forming a molten bead, interrupting the circuit.

In terms of applicable scenarios and characteristics, the 1500VDC photovoltaic fuse is widely used in power distribution systems and control systems, mainly for short-circuit protection or severe overload protection. It can protect electrical equipment simply and effectively, and mainly plays a short-circuit protection role in the circuit. In addition, this type of fuse is usually detachable, and the internal fuse can be replaced at any time when needed, which is convenient and quick. It is suitable for photovoltaic power generation systems and has high voltage tolerance and good environmental adaptability.