NXB-80 Miniature Circuit Breaker Datasheet & Manual

NXB-80 Miniature Circuit Breaker

The NXB-80 Miniature Circuit Breaker (MCB) from CHINT provides reliable overload and short-circuit protection in residential, commercial, and industrial applications. Designed for AC 230/400V systems with 70A and 80A rated currents, it ensures safety, stability, and efficient current control. Built to IEC/EN 60898-1 standards, the NXB-80 offers positive isolation, high endurance, and a 6kA breaking capacity, delivering long-term, maintenance-free performance in modern low-voltage power distribution systems.

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FAQs

What is the main function of the NXB-80 Miniature Circuit Breaker?

It protects electrical systems from overload and short-circuit conditions, ensuring operational reliability and safety in low-voltage installations.

What are the typical applications for the NXB-80?

The NXB-80 is ideal for residential, commercial, and industrial distribution networks, providing protection for circuits, lighting systems, and power equipment.

What tripping curves are available?

It offers B, C, and D curve options to accommodate various load characteristics — from resistive loads (B) to inductive or motor-driven circuits (D).

What is the breaking capacity of the NXB-80?

The breaker has a 6kA short-circuit breaking capacity, providing dependable protection in standard low-voltage environments.

Is the NXB-80 compatible with auxiliary accessories?

Yes. It supports a range of auxiliary accessories, including AX-X1 (auxiliary contact), AL-X1 (alarm contact), and SHT-X1/OVT-X1/UVT-X1 shunt or undervoltage trip units for enhanced control and monitoring.

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NXB-80 Miniature Circuit Breaker

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