MCB
008 Low Voltage Brief Catalogue P - Miniature Circuit Breaker NB8 -63H
2. TECHNICAL DATA
Standard
IEC 60947-2
NB8-63H
Rated current In Rated voltage Ue Rated frequency
A
1、2、3、4、6、10、16、20、25、32、40、50、63
V
230 / 400
Hz
50
1. General
Poles
1P, 1P+N, 2P, 3P, 3P+N, 4P
1.1 Function Protection of circuits against short-circuit currents, protection of circuits against overload currents, switch, isolation. NB8 -63H 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 A V B(3-5In)，C(5-10In)，D(10-16In)， 20,000 10,000 10,000 500 KV 6
Thermo-magnetic release characteristic
Mechanical life
Electrical life Rated breaking capacity
Insulation voltage Ui
Rated impulse withstand voltage (1.2/50) Uimp
NB8-63H
2.Technical features
3.Curve
CHINT
02
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