DGG5-63G high-breaking miniature circuit breaker (hereinafter referred to as circuit breaker) is suitable for protection power distributionlines with Ac 50Hz or 0Hz, rated working voltage 230/400v, rated current to 63A circuit, rated short-circuit breaking capacity not exceeding6000A. As the line is not connected freguently, With overload and short circuit protection. At the same time, it has powerful auxiliarylunction modules, such as auxllarv contacts, alarm indication contacts, shunt release, undervoltage release, remote trip control and othelmodules.