Automatic loop labeling method for CAD (Computer Aided Design) electrical system diagram

The invention discloses an automatic loop labeling method for a CAD (computer-aided design) electrical system diagram, which comprises the following steps of: opening the CAD electrical system diagram, manually labeling power parameters, compiling an electrical calculation formula, component type selection and cable type selection logic judgment relation into a computer program (CAD plug-in), and after the computer program is installed, automatically labeling the CAD electrical system diagram. Under the condition that the mouse selects the power parameter of each loop in the CAD graph, the calculation program is clicked to run, data such as current, circuit breaker rated current, transformer transformation ratio and wire specification are automatically generated at corresponding positions in the graph, and fonts of the generated data are consistent with fonts of the power parameters; the working efficiency of designers is improved, and the accuracy of parameters is ensured. 本发明公开了一种CAD电气系统图的回路自动标注方法，包括步骤：打开CA