DMW1 series air circuit breaker (hereinafter referred to as ACB) is suitable for AC 50Hz, rated operating voltage of 400V–690V AC, rated current 200A–6300A distribution network, primarily used for power distribution and power generation system protection. Provides protection against overload, undervoltage, overvoltage, current/voltage imbalance, short-circuit, and ground-fault conditions for line and power supply equipment.Through load monitoring and regional interlocking, the system realizes rational operation of the power grid.At the same time, it can also measure current; voltage; power; frequency; energy; power demand; harmonics; and other electrical parameters of the grid node.