Name: NB8-125 Moulded Case Circuit Breaker
Brand: Chint

NB8-125 Moulded Case Circuit Breaker

The NB8-125 Moulded Case Circuit Breaker (MCCB) is engineered for reliable protection and isolation in low-voltage distribution systems up to AC 415V/DC 220V and 125A. It safeguards against overload, short-circuit, and insulation faults in commercial, residential, and light industrial applications. Built to IEC 60947-2 and GB/T14048.2 standards, the NB8-125 combines compact size, thermal-magnetic tripping, and high endurance — ensuring long-term performance and operational safety.

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FAQs

What applications is the NB8-125 MCCB suitable for?

It’s designed for low-voltage distribution systems in commercial buildings, residential facilities, and general industries, providing reliable overload and short-circuit protection up to 125A.

What are the main tripping curves available?

The NB8-125 offers C and D curves:

Curve C: For resistive and mixed loads (motors, lighting).

Curve D: For highly inductive loads or motors with high inrush current.

What environments can the NB8-125 operate in?

It operates safely between −35°C and +70°C, at altitudes up to 2000 meters, and withstands humidity up to 95%, ensuring performance even in harsh conditions.

Is the NB8-125 compatible with accessories?

Yes, it supports multiple CHINT accessories, including S9, V9, XF9, XF9J signal and auxiliary contacts, and OVT-1/OUVT-1 voltage releases, for enhanced control and monitoring.

How long is the operational lifespan?

The NB8-125 offers 20,000 mechanical and 10,000 electrical operations, ensuring long-term durability with minimal maintenance needs.

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NB8-125 Moulded Case Circuit Breaker

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