LV SwitchgearMV Switchgear
NB1-63 Miniature Circuit Breaker

1.1 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.

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 inrushcurrent.

      D curve(10-14In)

protection for circuits which supply loads with high inrush current at the circuit closing 

(LV/LV transformers, breakdown lamps).

1.3 Approvals and certificates

Detailed information, please refer to Certificates Table on the last page.


1.1 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.

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 inrushcurrent.

      D curve(10-14In)

protection for circuits which supply loads with high inrush current at the circuit closing 

(LV/LV transformers, breakdown lamps).

1.3 Approvals and certificates

Detailed information, please refer to Certificates Table on the last page.


NB1 Miniature Circuit Breaker Sample.pdf2.01 MB
NB1-63.pdf882.77 KB
NB1-63 UL1077.pdf219.67 KB
NB1-63 IEC60947.pdf286.51 KB
NB1-63_CE (60947-2).pdf88.17 KB
NB1-63,-63H_UL.pdf243.63 KB
NB1-63_UL.pdf243.63 KB
NB1-63_SEMKO.pdf409.30 KB
NB1-63_CE.pdf88.17 KB
NB1-63_VDE.PDF672.10 KB
NB1-63_CB.pdf369.17 KB
NB1-63-4P_2D(V1).dwg297.57 KB
NB1-63-4P_3D(V1).igs51.91 MB
NB1-63-1P_2D(V1).dwg1.06 MB
NB1-63-1P_3D(V1).igs27.38 MB
NB1-63-2P_3D(V1).igs27.04 MB
NB1-63-2P_2D(V1).dwg277.19 KB
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