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NB3LEU Residual Current Operated Circuit Breaker with Over-current Protection(Electronic)

1.1 Selection

    Rated residual operating current 

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

    Tripping class

    AC class – Tripping is ensured for sinusoidal, alternating 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.

1.2 Approvals and certificates

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


1.1 Selection

    Rated residual operating current 

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

    Tripping class

    AC class – Tripping is ensured for sinusoidal, alternating 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.

1.2 Approvals and certificates

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


NB3LEU Residual Current Operated Circuit Breaker with Over-current Protection(Electronic) Sample.pdf64.99 KB
NB3LEU_CE.jpg506.26 KB
NB3LEU-50_CE.jpg571.91 KB
NB3LEU-50_CE.pdf77.40 KB
NB3LEU_2D(V1).dwg136.50 KB
NB3LEU_3D(V1).igs36.31 MB
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