For details, please refer to this standard. GB/T 4728.7-2000 Graphical symbols for electrical schematics Part 7: Switches, control and protection devices GB/T4728.7-2000 Standard download decompression password: www.bzxz.net

GB/T4728.7—2000
EC Preface
IEC Introduction
Qualifying symbols
2 Contacts with two or three positions
3 Transition contacts with two positions
4 Contacts with early and delayed action
5 Contacts with delayed action
6 Contacts with automatic return and without automatic return Contents
Part I
General provisions
Part II
Part III
Switches, switching devices and starters| |tt||Single-pole switch
Position switch
Thermal switch
10 Variable speed sensitive contacts, mercury level switch (moved to Appendix A1)11
Multi-position switch, including control switch exampleBlock symbol for compound switch.
Power switching device
Block symbol for motor starter
Part IV
Operating device
With or without relay
Part V
Measuring relays and related devices
16 Block symbols and limit Fixed symbols
17 Examples of measuring relays
18 Other devices
Chapter VI Proximity and contact sensitive devices
Sensors and detectors
GB/T4728.7—2000
21 Fuses and fuse switches
Spark gaps and lightning arresters
Fire extinguishers (moved to Appendix A3)
24 Ignitors and sign indicators (moved to Appendix A4)25 Static switches
26 Static switching devices
27 Coupling devices and static Appendix A (suggestive appendix) of state relay block symbols
Old symbols (I)
Appendix B (suggestive appendix)
Old symbols (II)
Chapter 7
Chapter 8
.......
Protection devices
Other symbols
GB/T4728.7—2000
This standard is equivalent to the International Electrotechnical Commission standard IEC617-7:1996 "Graphical symbols for schematic diagrams Part 7: Switches, control and protection devices".
This standard is a revision of GB/T4728.7-1984 "Graphical symbols for switches, controls and protective devices for electrical diagrams". Compared with GB/T4728.4-1984, the symbol classification and category names of this standard have changed significantly; 16 symbols have been deleted, and 18 symbols have been added, including 07-01-09, 07-07-05, 07-07-06, 07-08-04, 07-13-11, 07-13-12, 07-13-13, 07-13-14, 07-15-22, 07-25-01, 07-25-02, 07-25-03, 07-26-01, 07-26-02, 07-26-03, 07-26-04, 07-27-01, 07-27-02. GB/T4728.7 is a part of the series of standards "Graphical symbols for electrical schematics". This series of standards includes the following parts:
GB/T4728.1 General principles of graphic symbols for electrical diagrams GB/T4728.2 Graphic symbols for electrical schematics Part 2: Symbol elements, limiting symbols and other commonly used symbols GB/T4728.3 Graphic symbols for electrical schematics Part 3: Conductors and connectors
GB/T4728.4 Graphic symbols for electrical schematics Part 4: Basic passive components
Part 5: Semiconductor tubes and electron tubes
Graphic symbols for electrical schematics
GB/T4728.5
GB/T4728.6
Graphic symbols for electrical schematics
Part 6: Generation and conversion of electric energy
GB/T4728.7
Graphic symbols for electrical schematics
Part 7: Switches Graphic symbols for electrical diagrams - Switches, control and protection devices - Measuring instruments, lights and signalling devices GB/T4728.8
GB/T4728.9
Graphic symbols for electrical schematics - Part 9: Telecommunications: switching and peripheral equipment GB/T4728.10
Graphic symbols for electrical schematics - Part 10: Telecommunications: transmission GB/T4728.11
Graphic symbols for electrical diagrams - Power, lighting and telecommunication arrangements GB/T4728.12
2 Graphic symbols for electrical schematics - Part 12: Binary logic elements GB/T4728.13
3 Graphic symbols for electrical schematics - Part 13: Analogue elements The scope and referenced standards of this series of standards can be found in IEC617-1. When revising GB/T4728.1-1984, IEC617-1 is intended to be adopted as the equivalent. Appendix B and Appendix C of the original IEC617-7:1996 are French and English indexes respectively, which are deleted in this standard. Appendix B of this standard is the symbols added to GB/T4728.7-1984 that are not in the original IEC617-7 (1st edition). This standard replaces GB/T4728.7-1984 from the date of entry into force. Appendix A and Appendix B of this standard are both indicative appendices. This standard is proposed and coordinated by the National Technical Committee for Electrical Documentation and Graphic Symbol Standardization. This standard is drafted by the Mechanical Science Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are: Guo Ting, Li Shilin, Gao Huimin, Li Ling, Song Xiuqiang, Wang Guanghuai, Li Ping. This standard was first published in 1984. 1
GB/T4728.7-2000
IEC Foreword
1) IEC (International Electrotechnical Commission) is a worldwide standardization organization including all national electrotechnical committees (IEC national committees). The stated objective of the EC is to promote international cooperation on all matters relating to standards in the electrical and electronic fields. For this purpose and other activities, the EC also publishes international standards. The preparation of international standards is entrusted to technical committees. Any EC national committee may participate in the standard-making process if it is interested in the subject under study. International organizations, governmental and non-governmental organizations that have relations with the EC may also participate in the standard-making process. The IEC and the International Organization for Standardization (ISO) work closely under the conditions determined by the agreement between them. 2) The formal decisions and agreements of the IEC on technical matters are drawn up by technical committees in which national committees with special interest in these matters participate, and express as far as possible an international consensus on the subject matter involved. 3) They are published in the form of standards, technical reports or guidelines and recommended for international use, and in this sense are accepted by the national committees.
4) In order to promote international unification, the IEC national committees undertake the task of applying the IEC international standards to the greatest extent possible in their countries and regions. Any differences between the EC international standards and the corresponding national or regional standards should be clearly indicated in the latter. International Standard IEC 617-7 was prepared by IEC Technical Committee 3A (Graphical Symbols for Diagrams) of IEC Technical Committee 3 (Documentation and Graphical Symbols).
This second edition cancels and replaces the 1983 first edition and is technically revised. The text of this standard is based on the following documents:
Draft International Standard (FDIS)
3A(CO)159A
3A(CO)168
3A(CO)169
3A(CO)172
3A(CO)200
3A(CO)202
3A(CO)203
3A(CO)207
3A/385/FDIS
Voting Full information on this standard can be found in the voting report mentioned in the table above. Annexes A, B and C are for reference only. N
Voting Report
3A(CO)171
3A(CO)177
3A(CO)178
3A(CO)181
3A(C O)211
3A(CO)214
3A(CO)215wwW.bzxz.Net
3A(CO)219
3A/423/RVD
GB/T4728.7—2000
IEC Introduction
This part of IEC 617 forms part of the series of graphic symbols for diagrams. This series includes the following parts:
Part 1: General information, general index, comparison tablePart 2: Symbol elements, qualifiers and other commonly used symbolsPart 3: Conductors and connectors
Part 4: Basic passive components
Part 5: Semiconductor tubes and electron tubes
Part 6: Generation and conversion of electrical energy
Part 7: Switches, control and protection devicesPart 8: Measuring instruments, lamps and signaling devicesPart 9: Telecommunications: switching and peripheral equipmentPart 10: Telecommunications: transmission
Part 11: Drawings and diagrams of architectural and surveying installationsPart 12: Binary logic elements
Part 13: Analog components
The scope and referenced standards of this series are shown in IEC617-1The above symbols are designed according to the requirements of IS011714-1* to be published. The module M used is 2.5mm. In order to make the smaller symbols clearer, in this standard these symbols are enlarged by one time and marked with "200%" in the symbol column; in order to save space, the larger symbols are reduced by one time and marked with "50%" in the symbol column. In order to facilitate the drawing of multiple terminals and meet other layout requirements, the size of the symbol (such as height) can be changed according to Article 7 of ISO11714-1. Regardless of whether the size of the symbol is enlarged, reduced or corrected, the original line width is not corrected proportionally.
The symbol layout of this standard should make the distance between the connecting lines a multiple of a certain module. In order to facilitate the marking of the terminal, 2M is usually selected. For ease of understanding, the symbols are drawn at a certain size, and the same network is used when drawing all symbols. In computer-aided drawing systems, all symbols should be drawn in a grid, and the grid used is reproduced on the background of the symbol. The old symbols included in Appendix A of the first edition of IEC617-7 have a transition period. This part is no longer included in the second edition, and it will be made clear that they are no longer used.
The index to Annexes B and C includes an alphabetical index of the symbol names and their numbers, the symbol names being based on the description of the symbols in this part. A general index including the alphabetical order of the symbols of all parts is given by IEC 617-1. * Currently, it is still at the stage of draft international standard (Document 3/563/DIS). V
National Standard of the People's Republic of China
Graphical symbols for diagrams-Part 7, Switchgear, controlgear and protective devices Part I General provisions
GB/T 4728.7—2000
idt IEC 617-7:1996
Replaces GB/T 4728.7—1984
A small circle, either hollow or solid, representing a node, may be added to most symbols. See 07-02-02 for the legend. In some symbols, the circle indicating the node should be drawn, as shown in Figure 07-02-05. For other representation methods of switches, such as particularly complex electronic switches, see Chapter 17A and Chapter 29 of GB/T4728.12-1996 "Graphic Symbols for Electrical Schematics Part 12: Binary Logic Elements" and Chapter 17 of GB/T4728.13-1996 "Graphic Symbols for Electrical Schematics Part 13: Analog Elements". Qualifying symbols
07-01-01
07-01-02
07-01-03
07-01-04
07-01-05
07-01-06
Graphic symbols
Approved by the State Administration for Quality and Technical Supervision on 2000-01-03Contactor function
Circuit breaker function
Isolating switch function
Load switch function
Automatic release function initiated by built-in measuring relay or release
Position switch function
1. When it is not necessary to indicate the operating method of the contact, this qualifier can be used on a simple contact symbol to indicate a position switch. If the situation is complicated and the operation method needs to be indicated, the symbols 02-13-16 to 02-13-19 should be used.
2. When the mechanical operating contacts are used in both directions, this symbol should be added on both sides of the contact symbol.
2000-07-01 Implementation
07-01-07
07-01-08
07-01-09
GB/T4728.7-2000
Graphic symbols
Automatic return function. For example, elastic return
1. This symbol can be used to indicate automatic return, see the legend 07-06-01
2. This symbol cannot be used with the limiting symbols 07-01-01, 07-01-02, 07-01-03 and 07-01-04. In many cases, the symbol 02-12-07
Contacts in two or three positions
07-02-01
07-02-02
07-02-03
No automatic return (hold position) function
1. This symbol may be used to indicate that there is no automatic return function. When this provision is implemented, its use shall be appropriately marked. 2. This symbol shall not be used with the limiting symbols 07-01-01, 07-01-02, 07-01-03 and 07-01-04. In many cases, the symbol 02-12-08
Forward operation of switch
1. This symbol shall be used to indicate the forward operation direction of a motorized device, which is safe or satisfactory in the direction shown. It indicates operation ensuring that all contacts are in the corresponding positions of the starting device
2. If the contact represents a connection, this symbol will apply to all connected contacts unless otherwise specified (see symbol 07-08-04) Part 2 Contact
Graphic symbol
Form 1
Form 2:
Make (normally open) contact
This symbol can also be used as the general symbol of a switch Make (normally closed) contact
07-02-04
07-02-05
07-02-06
07-02-07
07-02-08
07-02-09
G B/T4728.7-2000
Graphic symbols
Break-before-make changeover contacts
Bidirectional changeover contacts with intermediate break
Form 1:
Transition contacts with two positions
07-03-01
07-03-02
Graphic symbols
Make-before-break changeover contacts
Double-acting make contacts
Double-acting break contacts
Transitional make contacts that are temporarily closed when the operating device is pulled in
Transitional make contacts that are temporarily closed when the operating device is released
07-03-03
GB/T4728.7-2000
Graphic symbols
When the operating device is attracted or released, the transition contact that is temporarily closed
Contacts with early and delayed action
07-04-01
07-04-02
07-04-03
07-04-04
Contacts with delayed action
Figure Shape symbol
(in a multi-contact group)Make contact that closes earlier than other contacts
(in a multi-contact group)Make contact that closes later than other contacts
(in a multi-contact group)Break contact that releases later than other contacts
(in a multi-contact group)Break contact that releases earlier than other contacts
See symbols 02-12-05 and 02-12-06. For the closing or releasing operation, the closing and opening of the contacts are delayed. The movement towards the center of the arc is delayed (parachute effect). Symbols that have a delay effect can be drawn on the side of the contact symbol, which is best suited to the application and the layout of the device symbols.
07-05-01
Graphic symbol
When the operating device is attracted, the normally closed contact is delayed. Serial number
07-05-02
07-05-03
07-05-04
07-05-05
07-05-06
GB/T4728.7-2000
Graphic symbol
When the operating device is released, the normally closed contact is delayed. A break contact that opens with a delay when the operating device is energized. A break contact that closes with a delay when the operating device is released. A make contact that closes with a delay when the operating device is energized and opens with a delay when released.
Example:
A contact group consisting of a non-delayed make contact, a make contact that closes with a delay when energized, and a break contact that closes with a delay when released.
Contacts with automatic return and without automatic return 6
The provisions of symbols 07-01-07 and 07-01-08 apply. Serial number
07-06-01
07-06-02
07-06-03
Graphic symbol
Making contact with automatic return
Making contact without automatic return
Making break contact with automatic return
07-06-04
GB/T4728.7-2000
Graphic symbol
Two-way contact with automatic return on one side (see left) and open in the middle without automatic return on the other side
Part 3 Switches, switch devices and starters Since "push" or "pull" operating devices generally have automatic return, the automatic reset symbol (02-12-07) does not need to be shown, but in those cases without automatic return, the positioning symbol (02-12-08) should be shown. Rotary operated devices generally do not have automatic reset, so the positioning symbol (02-12-08) does not need to be shown, but in the case of automatic return, the automatic reset symbol (02-12-07) should be shown. Single-pole switch
07-07-01
07-07-02
07-07-03
07-07-04
07-07-05
07-07-06
Graphic symbols
Manually operated switch, general symbol
Push button switch with make contact and automatic resetPull-out switch with make contact and automatic resetRotary switch with make contact but no automatic resetPush button switch with make contact for positive operation (e.g. alarm switch)
Make contact for positive operation and Emergency stop switch with holding function (operating "mushroom head")
8-position switch
GB/T4728.7-2000
Here, one or more of a group of contacts consists of a function with a positive disconnect operation, which may involve: the opening of the break contact (for example 07-08-04: position switch and 07-07-06: emergency stop switch) or the closing of the make contact (for example 07-07-05: alarm switch) and
either all contacts or only individual contacts (see figure 07-13-14), but the same contact cannot be opened and closed at the same time. No.
07-08-01
07-08-02
07-08-03
07-08-04
Thermosensitive switch
07-09-01
07-09-02
Graphic symbol
Graphic symbol
Position switch, make contact
Position switch, break contact
Position switch, two-way mechanical operation for two independent circuits, position switch with positive break contact
Thermosensitive switch, make contact
Note: 6 can be replaced by operating temperature.
Thermosensitive switch, break contact
The note of symbol 07-09-01 applies to this symbol7-2000
Here one or more of a group of contacts consists of functions with positive opening operations, which may involve: the opening of the break contacts (for example 07-08-04: position switch and 07-07-06: emergency stop switch) or the closing of the make contacts (for example 07-07-05: alarm switch) and
either all contacts or only individual contacts (see figure 07-13-14), but the same contact cannot be opened and closed at the same time. No.
07-08-01
07-08-02
07-08-03
07-08-04
Thermosensitive switch
07-09-01
07-09-02
Graphic symbol
Graphic symbol
Position switch, make contact
Position switch, break contact
Position switch, two-way mechanical operation for two independent circuits, position switch with positive break contact
Thermosensitive switch, make contact
Note: 6 can be replaced by operating temperature.
Thermosensitive switch, break contact
The note of symbol 07-09-01 applies to this symbol7-2000
Here one or more of a group of contacts consists of functions with positive opening operations, which may involve: the opening of the break contacts (for example 07-08-04: position switch and 07-07-06: emergency stop switch) or the closing of the make contacts (for example 07-07-05: alarm switch) and
either all contacts or only individual contacts (see figure 07-13-14), but the same contact cannot be opened and closed at the same time. No.
07-08-01
07-08-02
07-08-03
07-08-04
Thermosensitive switch
07-09-01
07-09-02
Graphic symbol
Graphic symbol
Position switch, make contact
Position switch, break contact
Position switch, two-way mechanical operation for two independent circuits, position switch with positive break contact
Thermosensitive switch, make contact
Note: 6 can be replaced by operating temperature.
Thermosensitive switch, break contact
The note of symbol 07-09-01 applies to this symbol
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