NXBL-40Y Residual Current Operated Circuit Breaker with over-current protection (Magnetic) Datasheet & Manual

NXBL-40Y Residual Current Operated Circuit Breaker with over-current protection (Magnetic)

The NXBL-40Y RCBO combines residual current and over-current protection in one device, ensuring comprehensive safety for personnel, equipment, and wiring. It detects earth faults, overloads, and short circuits, automatically disconnecting the circuit to prevent electric shocks and fires. With a rated breaking capacity of 4.5kA, sensitivity from 30mA to 300mA, and tripping curves (B or C) for diverse applications, the NXBL-40Y offers high reliability, compact design, and CE-certified performance for residential, commercial, and industrial power systems.

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FAQs

What is the main function of the NXBL-40Y RCBO?

It combines residual current protection and over-current protection, ensuring comprehensive electrical safety by disconnecting the circuit during earth leakage, overload, or short-circuit faults.

What types of electrical systems is it suitable for?

The NXBL-40Y is ideal for residential, commercial, and industrial TN and IT systems, protecting both people and equipment from electrical faults.

What’s the difference between the B and C tripping curves?

B curve (3–5 In): Protects circuits with low inrush currents and long cables.

C curve (5–10 In): Suited for circuits with resistive and inductive loads, such as motors and lighting.

What sensitivity options are available?

It offers 30mA, 100mA, and 300mA sensitivities—covering personal protection, equipment safety, and fire prevention.

How is the NXBL-40Y installed?

It mounts on a 35mm DIN rail (EN 60715) with quick-release clips, supporting top and bottom connections for convenient installation in compact panels.

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NXBL-40Y Residual Current Operated Circuit Breaker with over-current protection (Magnetic)

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NXBL-40Y Residual Current Operated Circuit Breaker with over-current protection (Magnetic)

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