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NB1L Residual Current Operated Circuit Breaker with Over-current Protection(Magnetic)

1.1 Function

    Personnel and fire protection: Cable and line protection against overload and short-circuits.

1.2 Selection

    Rated residual operating current

    I∆n ≤30 mA: additional protection in the case of direct contact.

    I∆n ≤300 mA: preventative fire protection in the case of ground fault currents.

    Tripping class

    AC class 

    Tripping is ensured for sinusoidal,alternating currents, whether they be quickly applied or slowly increase.

      A class 

     Tripping is ensured for sinusoidal, alternating residual currents as well as for pulsed DC residual currents, whether they be quickly applied or slowly increase.

      Tripping curve

      B curve (3-5 In) protection and control of the circuits against  overloads and short-circuits; protection for people and big length cables in TN and IT systems.

      C curve (5-10 In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive loads with low inrush current.

1.3 Approvals and certificates

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


1.1 Function

    Personnel and fire protection: Cable and line protection against overload and short-circuits.

1.2 Selection

    Rated residual operating current

    I∆n ≤30 mA: additional protection in the case of direct contact.

    I∆n ≤300 mA: preventative fire protection in the case of ground fault currents.

    Tripping class

    AC class 

    Tripping is ensured for sinusoidal,alternating currents, whether they be quickly applied or slowly increase.

      A class 

     Tripping is ensured for sinusoidal, alternating residual currents as well as for pulsed DC residual currents, whether they be quickly applied or slowly increase.

      Tripping curve

      B curve (3-5 In) protection and control of the circuits against  overloads and short-circuits; protection for people and big length cables in TN and IT systems.

      C curve (5-10 In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive loads with low inrush current.

1.3 Approvals and certificates

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


NB1L Residual Current Operated Circuit Breaker with over-current protection(Magnetic) Sample.pdf115.80 KB
NB1L(2).pdf869.88 KB
NB1L(3).pdf970.95 KB
NB1L(2H).pdf928.93 KB
NB1L-40,63.pdf974.63 KB
NB1L(2H)_CE.PDF2.25 MB
NB1L-40(H)_SEMKO .pdf717.02 KB
NB1L-40(H)_CE.pdf816.65 KB
NB1L-63_SAA.pdf586.09 KB
NB1L-40(H)_CB.pdf2.04 MB
NB1L-63_RCC.pdf632.06 KB
NB1L-40H_SAA.pdf683.08 KB
NB1L-63_SEMKO.pdf207.53 KB
NB1L-63_CB.pdf535.01 KB
NB1L-40(H)_FIMKO.pdf210.15 KB
NB1L-40_SAA.pdf578.79 KB
NB1L-40(H)_CE.pdf816.65 KB
NB1L(1P+N)_CE.pdf95.78 KB
NB1L-40 3p_3D(V1).x_t16.37 MB
NB1L(2)_3D(V1).igs13.35 MB
NB1L(2)_2D(V1).dwg2.35 MB
NB1L(2H)_2D(V1).dwg87.27 KB
NB1L(2H)_3D(V1).igs14.35 MB
NB1L(3)_2D(V1).dwg94.91 KB
NB1L(3)_3D(V1).igs18.98 MB
NB1L-40 1p+n_3D(V1).x_t10.35 MB
NB1L-40 2p_3D(V1).x_t11.62 MB
NB1L(2H)-2D.dwg556.74 KB
NB1L(2H)-3D.stp8.23 MB
NB1L-63 2p_3D(V1).x_t11.83 MB
NB1L-63 1p+n_3D(V1).x_t9.02 MB
NB1L-40_2D(V1).dwg256.44 KB
NB1L-40 4p_3D(V1).x_t20.37 MB
NB1L-40 3p+n_3D(V1).x_t17.03 MB
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