Name: NB7 Miniature Circuit Breaker
Brand: Chint

NB7 Miniature Circuit Breaker

The NB7 Series Miniature Circuit Breaker (MCB) provides essential electrical safety with robust overload and short-circuit protection for circuits up to 63A. It ensures reliable fault interruption to safeguard electrical installations and equipment, making it an ideal choice for residential, commercial, and industrial power distribution systems.

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FAQs

What is the purpose of the NB7 Miniature Circuit Breaker?

The NB7 MCB protects electrical circuits from overload and short-circuit faults, while also allowing safe manual switching and isolation of circuits.

What is the difference between the B, C, and D tripping types?

Type B: For resistive loads like lighting or heating.

Type C: For general-purpose inductive loads, such as motors.

Type D: For high inrush applications such as transformers and capacitive circuits.

What is the rated breaking capacity of the NB7 series?

The breaker provides up to 6kA breaking capacity for most current ratings and 4.5kA for higher-rated circuits (50–63A), ensuring reliability in demanding electrical environments.

Where can the NB7 MCB be installed?

It is suitable for residential, commercial, and industrial power distribution systems, including lighting and socket circuits in buildings, factories, and offices.

How should the NB7 be wired and installed?

The NB7 MCB supports DIN rail mounting and accepts copper conductors up to 25mm² with a 2N·m tightening torque, ensuring stable and safe connections.

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NB7 Miniature Circuit Breaker

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