Currently, there are several technical difficulties in the electrical wiring diagram of protection control devices, such as relatively fixed and low level pixels, difficulty for users to customize electrical graphics, lack of support for secondary development, and lack of universality in file formats. With the help of the design standard protocol module, component based graphic customization module, and electrical wiring diagram configuration module, this article provides users with an electrical wiring diagram configuration solution that is graphical, component based, pixel configurable, supports multi drawing, universal file format, and supports secondary development. The practical results show that this system will improve the research and testing efficiency of electrical wiring diagrams for relay protection control devices, streamline the development process, minimize development labor expenses, boost product competitiveness, and elevate customer satisfaction.