NB3LE Residual Current Operated Circuit Breaker with Over-current Protection (Electronic) Datasheet & Manual

NB3LE Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

The CHINT NB3LE RCBO is a compact and reliable protection device that combines residual current (earth leakage) and over-current protection in one unit. Designed for use in AC 50/60 Hz circuits up to 240 V, it ensures safety against overloads, short-circuits, and electric shock hazards. With B and C tripping curves, Type A and AC sensitivity, and a 6 kA short-circuit capacity, the NB3LE is ideal for residential and commercial applications requiring accurate, electronic protection and easy DIN-rail installation.

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FAQs

What does the NB3LE RCBO protect against?

It offers integrated protection from earth leakage, overload, and short-circuit faults, ensuring both equipment and personnel safety in electrical installations.

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

Type A: Detects both AC and pulsating DC leakage currents.

Type AC: Detects only sinusoidal AC currents.

This ensures suitable use for different electrical systems and load types.

How does temperature affect its performance?

The NB3LE maintains rated performance up to 30 °C, with a slight derating above that — e.g., 95% at 40 °C, 85% at 60 °C.

Is it easy to install and replace?

Yes. The fast clip-on DIN rail design allows simple installation and maintenance. It supports top connection with standard cable or busbar terminals.

What environments is the NB3LE suitable for?

It’s ideal for residential and commercial distribution boards, offering reliable protection in environments ranging from –5 °C to +40 °C, and up to 70 °C storage.

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NB3LE Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

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NB3LE Residual Current Operated Circuit Breaker with Over-current Protection (Electronic)

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