A PV combiner box is a device that allows the connection of multiple PV panels to a single inverter.
PV combiner boxes are designed to protect the voltage and current of all the panels connected to them, which means there is no risk of one panel’s energy affecting the other panels.
A PV combiner box can be installed on a rooftop or ground-mounted. A PV combiner box includes a DC breaker, DC fuse, and DC surge protection device and other supportive accessories. In this article, we will discuss DC breaker, DC fuse and DC surge protect device in detail.
What is a DC Fuse?
DC fuse is a safety device used to protect the electrical system from the high current that can cause fire or other danger.
A DC fuse will open the circuit if the current exceeds its rating. They are typically used to protect solar power system from damage caused by momentary power surges.
The DC fuse’s only drawback is that the arc created by direct current is extremely difficult to extinguish because the circuit contains no zero current flows. In order to reduce DC fuse arcing, the electrodes are spaced further apart, resulting in a larger fuse as compared to an AC fuse.
What is DC Breaker?
DC circuit breakers are one of the safety devices used in solar system wiring. It automatically disconnects power to the circuit when it senses an overload. It does this by opening up a switch that interrupts the flow of electricity to that particular part of the system.
Although some DC circuit breakers are designed to reset automatically, the majority must be reset manually. The process resumes as soon as you flip the switch. However, if the circuit breaker is reset, any appliances powered by the overloaded circuit will turn back on. Furthermore, the size of a DC circuit breaker is determined by the device it is designed to protect. USFULL helps select most suitable size DC breaker in PV combiner box.
What is DC Surge Protection Device?
The DC surge protection device is designed to protect the circuit. They are usually used in PV combiner box in order to provide more reliable protection.
The purpose of the dc surge protection device is to protect the combiner box and its components from overvoltages, thundering and lightning. It can also protect other downstream equipment, such as wiring and cables, from damage.
For more information of other devices and accessories in the box, please contact USFULL support team!
