APPLICATION NFIN Residual Current Circuit Breaker provide the function of isolation switching and earth leakage protection of electrical circuits.And alsoprovide the indirect protection of the operator's body against the dangerous effects of electric current and provide the protection of the fire caused by the electrical circuit fault. Main Technical parameter Type NFIN RCCB Number of poles 2P 、 4P Rated Current(In) 25 、 32 、 40 、 63 、 80 、 100A Rated residual operating current(I △ n) 30 、 100 、 300 、 500mA Rated residual non-operation current(I △ n) 15 、 50 、 150 、 250mA Rated Voltage(Un) AC 230/400V Residual current off-time ≤0.1S Type A 、 AC Ultimate short-circuit breaking capacity(Inc) 3000A Endurance ≥4000 Terminal protection IP20