Chint NB1L Residual Current Operated Circuit Breaker with over-current protection (Magnetic)

Chint NB1L Residual Current Operated Circuit Breaker with over-current protection (Magnetic)General 1. 1 Function Personnel and fire protection: Cable and line protection against overload and short circuits. 1. 2 Selection Rated residual operating current In 30 mA: additional protection in the case of direct contact. In 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

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
   I∆n ≤30 mA: additional protection in the case of direct contact.
   I∆n ≤300 mA: preventative fire protection in the case of ground fault currents.
   Tripping class
   AC class
   Tripping is ensured for sinusoidal, alternating currents,
2.  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