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

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

The CHINT NB1L RCBO combines residual current protection and magnetic over-current protection to provide comprehensive electrical safety. Designed for residential, commercial, and industrial applications, it safeguards circuits from overload, short-circuit, and earth leakage faults. With a compact DIN rail-mounted design and Type AC and Type A tripping classes, the NB1L ensures dependable performance in 230 V AC systems. Its 6 kA breaking capacity, fast tripping, and broad current range make it ideal for distribution systems requiring high reliability and user protection.

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FAQs

What does the NB1L RCBO protect against?

It provides complete protection against earth leakage, overload, and short-circuit conditions, ensuring both electrical safety and fire prevention.

What is the difference between Type A and Type AC models?

Type AC: Detects sinusoidal AC residual currents.

Type A: Detects both AC and pulsating DC residual currents, offering wider protection for electronic loads.

In what kind of applications can the NB1L be used?

It is suitable for residential and light commercial circuits, particularly those using mixed loads such as lighting, sockets, and small motors.

How does ambient temperature affect performance?

The circuit breaker’s rated current is temperature-compensated; above 30 °C, current capacity gradually decreases — e.g., 0.95 at 40 °C, 0.85 at 60 °C.

Can it be installed in both directions?

Yes. The NB1L supports top and bottom wiring, and can be mounted on standard DIN rails using a fast clip-on mechanism for easy installation.

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

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