009
010
NB8-63M
NB8-40J
1. General
1. General
1.1 Function protection of circuits against short-circuit currents, switch, isolation. NB8 -63M 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: C curve (6.4In-9.6In) protection for resistive and inductive loads with low inrush current. D curve(9.6-14.4In) protection for circuits which supply loads with high inrush current at the circuit closing (LV/LV transformers, breakdown lamps). 1.3 Certificate CE
1.1 Function Protection of circuits against short-circuit currents, protection of circuits against overload currents, switch, isolation. NB8 -40J 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 Miniature Circuit Breaker
NB8-63M
NB8-40J
NB8 -40J
2. TECHNICAL DATA
2. Technical features
2. Technical features
Standard
IEC 60947-2
Standard
IEC 60898-1
Rated current In Rated voltage Ue Rated frequency
A 1 、 2 、 3 、 4 、 6 、 10 、 16 、 20 、 25 、 32 、 40 、 50 、 63
Rated current In Rated voltage Ue Rated frequency
A 1 、 2 、 3 、 4 、 6 、 10 、 16 、 20 、 25 、 32 、 40 、
V 230/400
V 230/400
Hz 50
Hz 50
Poles
1P, 2P, 3P, 4P
Poles
1P, 2P, 3P, 4P
Thermo-magnetic release characteristic
C(6.4-9.6In), D(9.6-14.4In)
Thermo-magnetic release characteristic
B(3-5In), C(5-10In), D(10-16In)
Mechanical life
20,000 10,000
Mechanical life
15,000 10,000
Electrical life
Electrical life
Rated breaking capacity Insulation voltage Ui
A 10,000
Rated breaking capacity Insulation voltage Ui
A 4500(D), 6000(B, C)
V 500 Rated impulse withstand voltage (1.2/50) Uimp KV 6
V 500 Rated impulse withstand voltage (1.2/50) Uimp KV 4
3. Curve
3. Curve
C curve(5~10In)
D curve(10~16In)
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