Abstract Low voltage electrical power supply is mainly used for the protection and control of power grid equipment. With the gradual deepening of the construction for smart grid, it has become an important trend of the electrical appliance industry to carry out the intelligent transformation of low-voltage electrical appliances.Based on this background, this paper puts forward a scheme of low voltage intelligent electrical equipment which is combined with the actual situation. The DSP technology is introduced into the control of low voltage electrical apparatus, and the design carries out the integrated and intelligent control of low-voltage electrical apparatus.