GB/T 4728 "Graphical Symbols for Diagrams" can be divided into 13 parts:
——Part 1: General requirements;
——Part 2: Symbol elements, qualifier and other conventional signs;
——Part 3: Conductors and connecting pieces;
——Part 4: Basic passive component;
——Part 5: Transistor and vacuum tube;
——Part 6: Production and conversion of electrical energy;
——Part 7: Switchgear, controlgear and protective Devices;
——Part 8: Measuring instruments, lamps and signal device;
——Part 9: Telecommunications: switching and peripheral equipment;
——Part 10: Telecommunications: transmission;
——Part 11: Layout plan for building installation;
——Part 12: Binary logic element;
——Part 13: Analogue element.
This section is part 12 of GB/T 4728 and identical to IEC 60617 database "Graphical Symbols for Diagrams" data base standard (IEC 60617 _Snapshot_ 2007-01-10 English edition).
This part replaces GB/T 4728.12-1996 " Graphical Symbols for Diagrams Part 12: Binary Logic Element". Compared with GB/T 4728.12-1996, the differences are as follows:
——26 new symbols are added in:S01476, S01480, S01482, S01483, S01484, S01485, S01486, S01487, S01488, S01489, S01490, S01518, S01544, S01545, S01548, S01549, S01612, S01613, S01658, S01704, S01705, S01715, S01722, S01746, S01747, S01808;
——According to IEC 60617 data base standard, more information is listed for each symbol compared with the old edition.
This part is proposed by and under the jurisdiction of National Technical Committee on Electric Information Structures, Documentation and Graphic Symbols of Standardization Administration of China.
