This is a Circuit diagram connecting more than ten devices, which is a graphical representation used to show the path of current in electronic devices and the connection between components. It consists of a series of standardized symbols and graphic markings, which represent different electronic components such as ON/OFF、GPO、11kw FIRE PUMP, etc. Circuit diagrams are a crucial tool for understanding the working principles of electronic devices, providing designers, maintenance technicians, and technical experts with a precise and universal way of communication.