Description Place of Origin : China Brand Name : Chint Model Number : NB1L Poles Number : 2 Rated Voltage : 240V/415V BCD Curve : C Rated Frequency : 50/60hz Chint original NB1L RCBO 1P N B16 C10 C16 C20 C25 C40 C63 CHNT Residual Current Circuit Breaker with Over current Protection   NB1L Residual Current Operated Circuit Breaker with over-current protection (Magnetic)   1. General 1.1 Function      Personnel and fire protection: Cable and line protection against overload and short-circuits. 1.2 Selection      Rated residual operating current      IΔn ≤30 mA: additional protection in the case of direct contact.      IΔn ≤300 mA: preventative fire protection in the case of ground fault currents.       Tripping class      AC class      Tripping is ensured for sinusoidal,      alternating currents, whether they be quickly applied or slowly increase.      A class      Tripping is ensured for sinusoidal, alternating residual currents as well as for pulsed DC residual currents, whether they be               quickly applied or slowly increase.         Tripping curve      B curve (3-5 In) protection and control of the circuits against overloads and short-circuits; protection for people and big length           cables in TN and IT systems.      C curve (5-10 In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive       loads with low inrush current.