The intelligent circuit breaker is capable of realizing failure judgment and switching on or off control by measuring voltage and current signals of the solar cell module string, failure protection of the solar cell module string for short circuit and the like and an electrical signal telemetering function, and requirements for manual control during mounting are further taken into consideration so that safety of power generating by the aid of the solar energy is enhanced.
[pdf] If you have breaker tripping, then shut off main power. Then, remove panel and inspect wires connecting solar breaker for being loose, disconnected, etc. If not there, then check junction box on roof for similar. Somewhere, a short is occurring.
[pdf] Circuit breakers play a critical role in photovoltaic installations by providing safety and protection for both the solar panels and the overall electrical system. These devices act as electrical switches that detect faults, such as overloads or short circuits, and cut off the power to avoid damage.
[pdf] ABB’s outdoor live tank vacuum circuit breaker for IEC standards, with vacuum interrupters and spring mechanism rated up 40.5 kV. It is ideal for medium voltage distribution networks, wind and solar plants, and capacitor (including back-to-back capacitor banks) switching.
[pdf] DC breakers handle direct current, which flows in one direction from your solar panels. When a breaker interrupts a circuit, it creates an electric arc. This arc can damage the breaker if not controlled. AC breakers use the natural zero crossing of AC power to help extinguish the arc.
[pdf] Spring energy storage of circuit breakers safely stores mechanical energy. This stored energy helps the circuit breaker operate quickly when needed. It acts like a backup, ready to engage during electrical problems. This allows the circuit breaker to stop harmful currents rapidly.
[pdf] 
