NB1 Miniature Circuit Breaker
Protection of circuits against short-circuit currents,
Protection of circuits against overload currents, switch, isolation.
NB1 circuit-breakers are used in domestic installation, as well as in commercial and industry electrical distribution systems.
Technical data of the network at the point considered:
Short-circuit current at the circuit-breaker installation point, which must always be less than the breaking capacity of this device,
network normal voltage.
B curve (3-5In)
Protection for people and big length cables in TN and IT systems.
C curve (5-10In)
Protection for resistive and inductive loads with low inrush current.
Protection for circuits which supply loads with high inrush current at the circuit closing
(LV/LV transformers, breakdown lamps).
1.3 Approvals and certificates