This standard GB_T 4728.6-2000 Symbols for Electrical Simplified Diagrams Part 6: Limiting symbols for windings and their connections for generation and conversion of electric energy, motors, transformers and reactors, power converters, primary cells, accumulators and battery packs, power generation device.
GB/T 4728.6-2000 history
2022GB/T 4728.6-2022 Graphical symbols for electrical diagrams—Part 6: Production and conversion of electrical energy
2008GB/T 4728.6-2008 Graphical symbols for diagrams.Part6:Production and conversion of electrical energy
2000GB/T 4728.6-2000 Graphical symbols for diagrams-Part 6:Production and conversion of electrical energy