The main classification of fuses in photovoltaic combiner boxes

The fuse in a photovoltaic combiner box (also known as a combination box or PV combiner box) is an important safety component used to protect electrical equipment in the photovoltaic system from damage caused by overload or short circuit. Fuses can be mainly divided into the following types according to their types:
1. Quick fuse: This type of fuse has a very fast response speed and can quickly disconnect the circuit in the event of a short circuit, thereby protecting the circuit from further damage.
2. Slow action fuse: This type of fuse has a slower action speed and is suitable for situations where short-term overload will not immediately cause equipment damage. They allow for short-term current overload, but if the overload persists, the circuit will be disconnected.
3. Photovoltaic dedicated fuses: These types of fuses are designed specifically for photovoltaic systems and can withstand DC voltage and current. They typically have higher DC voltage and current ratings to adapt to the electrical characteristics generated by photovoltaic panels.
4. Thermal fuse: This type of fuse contains a thermal sensitive element that can disconnect the circuit in case of overheating, suitable for preventing circuit problems caused by overheating.
When selecting fuses, it is necessary to select appropriate types and specifications of fuses based on the specific requirements and electrical parameters of the photovoltaic system to ensure the safe operation of the system. This includes considering the rated current, rated voltage, and breaking capacity of the fuse.