Chint 40A 2 Pole NXB-63 MCB Miniature Circuit Breaker

Overload protection, short circuit protection and isolation. It is widely used in building power distribution, industrial power distribution, as well as control and protection for a variety of equipment with operating current not exceeding 40A.

Function: 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.

Selection: 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.

Tripping curves:
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 in rush current.
D curve(10-14In): protection for circuits which supply loads with high in rush current at the circuit closing