Miniature circuit breaker
A Miniature Circuit Breaker (MCB) is a terminal protective device widely used in low-voltage distribution networks (typically 50/60 Hz AC, rated voltage up to 1000 V). It combines the functions of overload protection...
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A Miniature Circuit Breaker (MCB) is a terminal protective device widely used in low-voltage distribution networks (typically 50/60 Hz AC, rated voltage up to 1000 V). It combines the functions of overload and short circuit protection, and is mainly designed to protect lines, electrical equipment and ensure the safety of people by preventing accidents caused by overload or short circuit.
The operating principle is based on a thermal release with a bimetallic plate for overload protection (time-delayed) and an electromagnetic release for short-circuit protection (instantaneous action). The miniature circuit breaker has a modular design; the standard module width (for example, 18 mm) allows it to be compactly installed in distribution boards. The device is characterized by high breaking capacity, safety, reliability, ease of use and quick recovery after troubleshooting. This is one of the most basic and key protection elements in modern construction, industrial control systems and household electrical networks.
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