MA60 series frame circuit breakers are suitable for distribution networks with AC 50/60Hz, rated current up to 7500A and rated voltage of AC 400/690V for distributing electrical energy and protecting lines and power supply equipment from overload, undervoltage, short circuit, single-phase earthing fault and other hazards. The series has comprehensive smart control and protection functions, high-precision selective protection, improving power supply reliability; the whole series has power monitoring and "four remote" functions, which can be widely used in rail transit, data communication, energy industry, public buildings and other key industries.