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 catalog.pdf806.49 KB
NB1L-40,63.pdf974.63 KB
NB1L(2H).pdf928.93 KB
NB1L(3).pdf970.95 KB
NB1L(2).pdf869.88 KB
NB1L REACH 202408.pdf386.00 KB
NB1L UA TR 202403.pdf3.30 MB
NB1L TISI 202107.pdf553.56 KB
NB1L SIRIM 202402.pdf6.86 MB
NB1L EAC 202206.pdf606.99 KB
NB1L(2H) KEMA 202404.pdf2.31 MB
NB1L-63 CE 202403.pdf509.25 KB
NB1L(2H) CB 202404.pdf110.66 KB
NB1L 2P SEMKO 202401.pdf796.37 KB
NB1L-40 CE declaration 202404.pdf315.28 KB
NB1L-63 CE declaration 202404.pdf326.53 KB
NB1L 2P CB 202401.pdf617.40 KB
NB1L CE 202309.pdf266.32 KB
NB1L CB 202309.pdf323.38 KB
NB1L 1PN CB 202304.pdf165.33 KB
NB1L 2P CE 202401.pdf479.72 KB
NB1L-63 TISI 202310.pdf1.20 MB
NB1L(1P+N)_CE.pdf95.78 KB
NB1L-40(H)_CE.pdf816.65 KB
NB1L-40_SAA.pdf578.79 KB
NB1L-40(H)_FIMKO.pdf210.15 KB
NB1L-63_CB.pdf535.01 KB
NB1L-63_SEMKO.pdf207.53 KB
NB1L-40H_SAA.pdf683.08 KB
NB1L-63_RCC.pdf632.06 KB
NB1L-40(H)_CB.pdf2.04 MB
NB1L-63_SAA.pdf586.09 KB
NB1L-40(H)_CE.pdf816.65 KB
NB1L-40(H)_SEMKO .pdf717.02 KB
NB1L(2H)_CE.PDF2.25 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
NB1L-40 3p_3D(V1).x_t16.37 MB
NB1L-40 2p_3D(V1).x_t11.62 MB
NB1L-40 1p+n_3D(V1).x_t10.35 MB
NB1L(3)_3D(V1).igs18.98 MB
NB1L(3)_2D(V1).dwg94.91 KB
NB1L(2H)_3D(V1).igs14.35 MB
NB1L(2H)_2D(V1).dwg87.27 KB
NB1L(2)_2D(V1).dwg2.35 MB
NB1L(2)_3D(V1).igs13.35 MB
  • Products
  • Solutions
    • Solar
      • Distributed PV
      • Off-grid PV
      • Solar Street Light
      • Commercial & Industrial PV Storage & Charging
      • Residential Photovoltaic Intelligent Charging & Storage
      • Solar Pump
  • Services
    • Customer Services
    • Enquiries
    • Download Center
  • About Us
    • Company
    • Blog
    • News Center
    • Events
    • Contact Us
    • Integrity and Compliance
    • Sustainability
  • Careers
Sunlight