CHINT'S Low Voltage Brief Catalogue

MCB

P 007 Low Voltage Brief Catalogue -

NB8 -63

Miniature Circuit Breaker

2. TECHNICAL DATA

NB8-63

1. General

1.1 Function protection of circuits against short-circuit currents, protection of circuits against overload currents, switch, isolation. NB8 -63 circuit-breakers are used in domestic installation, as well as in commercial and industry electrical distribution systems. 1.2 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 inrush current. D curve(10-16In) protection for circuits which supply loads with high inrush current at the circuit closing (LV/LV transformers, breakdown lamps). 1.3 Certificate CE

NB8-63

2.Technical features

3.Curve

t(S)

(S)

B curve (3~5In)

C curve (5~10In)

D curve (10~16In)

CHINT