JB/T 5872-1991 Electrical graphic symbols and text symbols for high voltage switchgear
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Electrical Graphics and Text Symbols for High-voltage Switchgear 1 Subject Content and Scope of Application
JB/T5872—1991
This standard specifies the electrical graphic symbols and corresponding text symbols for high-voltage switchgear with rated voltage of 3kV and above. This standard applies to the drawing of electrical diagrams for high-voltage switchgear. 2 Referenced Standards
GB4026
GB4728
GB5465
GB7159
3 Terminology
3.1 Graphic Symbols
General Rules for Identification of Electrical Terminals and Marking Terminals with Alphanumeric Symbols Graphic Symbols for Electrical Drawings
Graphic Symbols for Electrical Equipment
General Rules for the Development of Text Symbols in Electrical Technology Graphics, marks or characters usually used in drawings or other documents to represent a device or concept. 3.2 Symbols
A simple graphic with a definite meaning that must be combined with other graphics to form a complete symbol for a device or concept. 3.3 General symbol
A generally simple symbol used to represent a type of product and the characteristics of such products. 3.4 Qualifying symbol
A symbol added to other symbols to provide additional information. Note: Qualifying symbols cannot usually be used alone, but general symbols can sometimes be used as qualifiers. For example, the general symbol of a switch is added to the fuse symbol as a qualifier to form a fuse with an independent alarm circuit. 3.5 Box symbol
A simple graphic symbol used to represent the combination of components, equipment, etc. and their functions, without giving the details of the components, equipment, or considering all connections.
Note: Box symbols are usually used in drawings using single-line representation, and can also be used in drawings that represent all input and output wiring. 3.6. Item
A basic part, component, assembly, functional unit, equipment, system, etc. that is usually represented by a graphic symbol on the drawing. Such as resistors, relays, generators, amplifiers, power supply devices, switchgear, etc., can be called items. 3.7 Item code
A specific code used to identify the type of item in drawings, charts, tables and equipment, and to provide information such as the hierarchical relationship and actual location of the items.
4 Basic requirements
4.1 Drawing of graphic symbols
4.1.1 The graphic symbols in this standard are drawn in a size that is easy to understand, and the proportions between the symbols are as appropriate as possible. Approved by the Ministry of Machinery and Electronics Industry on October 24, 1991, and implemented on October 1, 1992
JB/T5872—1991
When arranging graphic symbols, the distance between connecting lines should be a multiple of the module (2.5mm), usually not less than 5mm. 4.1.2 The graphic symbols in this standard can be reduced or enlarged as needed. When a graphic symbol is used to define another graphic symbol, the symbol is often drawn in a reduced size. When symbols are reduced or enlarged, the proportions of the symbols to each other and to the symbols themselves should remain unchanged. 4.1.3 The orientation of the graphic symbols shown in this standard is not mandatory. Without changing the meaning of the symbol, the symbol can be rotated or placed in a mirror image according to the needs of the drawing layout, but the text and the direction of indication shall not be placed in an irregular manner. 4.1.4 In general, the width of the lines in a drawing should remain consistent. However, in order to highlight or distinguish certain circuits, functions, etc., connecting lines of different widths can be used. For example, the connecting lines of the main circuit (primary circuit) are represented by thick solid lines, and the connecting lines of the control circuit (secondary circuit) are represented by thin solid lines.
4.1.5 For the sake of clarity, graphic symbols are usually shown with connecting lines. 4.2 Numbering of symbols
Each graphic symbol in this standard is given a serial number, which consists of three sections: the first section (2 digits) indicates the chapter of this standard, a.
b. The second paragraph (2 digits) indicates the article of this chapter; the third paragraph (2 digits) indicates the nth symbol of this article. The three paragraphs are separated by a short dash "". The serial number of the first paragraph starts from 05, and the serial numbers of the second and third paragraphs start from 01. For example: 09-02-05-the fifth symbol in Article 9.2 Article 9.2 Chapter 9 4.3 Use of graphic symbols 4.3.1 This standard gives the general symbols of components, equipment and devices as completely as possible, and gives examples of commonly used combination symbols. If the symbols of certain specific devices or concepts are not specified in this standard, they are allowed to be derived according to the combination principles specified in GB4728. 4.3.2 In order to meet the requirements of different drawings or uses, the sizes of related symbols can be changed. For example, power transformers and measuring transformers often use symbols of different sizes.
4.3.3 Supplementary information can be added to most symbols, but examples are only given in this standard when there is a recommended method for expressing such information.
4.3.4 Some symbols in this standard have several graphic forms, and the "preferred form" is preferred. Only one graphic form can be selected in the same electrical drawing, and the size of the graphic symbol and the width of the line should be basically the same. 4.3.5 The graphic symbols given in this standard can be represented by simple general symbols. When it is necessary to distinguish their characteristics, symbols with content such as limiting symbols added to the general symbols can be selected. 4.4 Symbols adapt to the provisions of computer-aided drawing systems When using the symbols of this standard with computer-aided drawing systems, the provisions of Chapter 6 of GB4728.1 should be followed. 4.5 Text symbols
4.5.1 The text symbols of this standard are given in accordance with the provisions of GB7159 and the rules and principles of their composition. When the text symbols specified in this standard are not used, they can still be supplemented in accordance with the provisions of GB7159. 4.5.2. When it is not necessary to express the characteristics of the composite text symbols given in this standard (except LED light-emitting diodes), the first letter can be used to represent them; the first two letters can also be used to represent the text symbols with three letters. 4.6 Other provisions
4.6.1 The graphic symbols specified in this standard are all shown in the normal state without voltage and external force. 4.6.2 The text symbols, physical quantity symbols, etc. in the graphic symbol column of this standard should be regarded as components of the graphic symbols. 34
JB/T5872—1991
4.6.3 Graphic symbols in the tables of this standard that are identical to the international standard IEC617 are marked with "=", and text symbols that are consistent with the international standard IEC750 are marked with *=". When both graphic symbols and text symbols conform to IEC, only one "=" is marked in the "IEC" column. When neither of them has an IEC counterpart, it is left blank. The one that conforms to IEC is distinguished by "/". The left side of "/" is the graphic symbol, and the right side is the text symbol.
4 Graphic symbols in this standard that are identical to GB4728 are marked in the "GB" column with the sequence number of the graphic symbol in GB4728. 4. 6. 4
5 Common symbols
Types of current and voltage
05-01-01
05-01-02
05-01-03
05-01-04
05-01-05
05-01-06
05-01-07|| tt||05-01-08
05-01-09
05-01-10
05-01-11
05-01-12
05-01-13
05- 01-14
05-01-15
05-01-16
Graphic symbols
2M—220/110V
~50Hz
3N~50Hz
380/220V
Note: 1) The graphic symbols are in accordance with GB4026. DC
Note: The voltage can be marked on the right side of the symbol, and the system type can be marked on the left side.
For example, DC, three-wire 220V with a middle line (the voltage between the two wires and the middle line is 110V), 2M can be replaced by 2+M
Note: If,05-01-01The symbol may cause confusion, and this symbol can also be used
The frequency or frequency range and the voltage value should be marked on the right side of the symbol, and the system type should be marked on the left side of the symbol
Example:
AC, 50Hz
Other examples: AC, three-phase with neutral line 50Hz, 380V (the difference between neutral line and phase line is 220V). 3N can be replaced by 3+N
AC and DC
Neutral (neutral line)
Middle line
Power supply of DC system
First phase of AC system power supply
Second phase of AC system power supply
Third phase of AC system power supply
First phase of AC system equipment end
Second phase of AC system equipment end
Third phase of AC system equipment end
Protection line, protective grounding
Common line for protection and neutral
02-02-01
02-02-02
02-02-03
02-02- 04
02-02-05
02-02-07
02-02-12
02-02-14
02-02-15
02-02-16
02-02-17
11-A1-15
11-A1-17
11-A1-18
JB/T5872-1991
5.2 Direction of force or motion
An arrow may be used to indicate the direction in which the movable part of the symbol moves to give the desired effect (see the example of symbol 05-02-02). An arrow may also be used to indicate the direction of force or the direction of movement of the part represented by the symbol. In this case, it may be necessary to add an observation point. The effects produced by the motion can be described by symbols or words, see Table 2. Table 2
05-02-01
05-02-02
05-02-03
05-02-04
05-02-05
Graphic symbols
Graphic symbols for flow direction see Table 3.
05-03-01
05-03-02
05-03-03
Graphic symbols
Straight line motion or force in the direction of the arrow
Bidirectional straight line motion or force
For example, when 3 moves from 1 to 2, the rate increases. Rate decrease
Rate increase
One-way rotation in the direction of the switch (clockwise direction is shown)
Two-way rotation
Two-way rotation with restrictions in both directions
Energy output from the busbar (busbar)
Energy input to the busbar (busbar)
Two-way energy flow (two-way energy transmission) Graphic symbols of mechanical connections, text symbols are shown in Table 4. Table
05-04-01
05-04-02
05-04-03
05-04-04
05-04-05
05-04-06
05-04-07
05-04-08
Graphic symbols
Text symbols
Mechanical couplings, clutches
Connection Mechanical coupling
Example, one-way coupling for rotation (live wheel) Brake
Example: electric motor with brake and braked Mechanical interlock between two components
Disengaged mechanical coupling
Example: electric motor with brake and unbraked IEC
02-04-01
02-04-02
02-04-03
02-04-04||tt| |02-04-05
02-05-06
02-05-07
02-05-08
02-12-16
02-12-18
02-12-19
02-12-20
02-12-21| |tt||02-12-11
02-12-17
02 -12-22
JB/T5872--1991
5.5 Graphic symbols for grounding, connection to chassis and equipotentiality. See Table 5 for text symbols. Table 5
05-05-01
05-05-02
05-05-03
05-05-04
05-05-05
05-05-06
Graphic symbols||tt ||Form 1
Form 2
5.6 Other graphic symbols and text symbols are shown in Table 6. Sequence
05-06-01
05-06-02
05-06-03
05-06-04
05-06-05
Graphic symbol
Form 1
Form 2
Text symbol
Generally Symbol
Note: If the grounding condition or function is not obvious enough, you can add a description
Noise-free grounding (anti-interference grounding)
Protective grounding
Note: This symbol can be used instead of symbols 05-05-01 to indicate a protective function, such as grounding to prevent electric shock in the event of a fault
Connect to the housing or base
Equipotential
Text symbol
Fault (used to indicate false Fixed fault position quantity)
Flashover, breakdown
Insulation breakdown between conductors
Insulation breakdown between conductor and housingbZxz.net
02-15-01
02-15-02
02-1503
02-15-04
02-15-05
02-15-06
02-17-01
02-17-02|| tt||02-17-03
02-17-04
02-17-05
05-06-06
05-06-07
05-06-08
05-06-09
05-06-10
Wires and connecting devices
Graphic symbols
6.1 Graphic symbols and text symbols for wires are shown in Table 7. Sequence
06-01-01
Graphic symbols
JB/T5872-1991
Continued Table 6
Text symbols
Insulation breakdown of conductor to ground
Permanent magnet
AC electromagnet
DC electromagnet
Test point indication
Example:
Text symbols
Conductor, conductor group, wire, cable, circuit, line| |tt||General symbols for busbars
Power busbar
Closing busbar
Signal busbar
Voltage busbar
When it is necessary to indicate the phase sequence of the AC power supply and the polarity of the DC power supply, the following symbols can be marked in brackets after the text symbols:
AC phase sequence
First phase: U (equipment end)
L1 (power end)
Second phase: V (equipment end)||tt| |L2 (power supply end)
Third phase: W (equipment Rui)
L3 (power supply end)
Positive pole +
DC polarity
Negative pole -
Note: When a single line is used to represent a group of wires, if the number of wires needs to be indicated, a short slash or a short slash plus a number can be added to indicate
02-17-06
02-17-07
02-17-09
03-01- 01 | | tt | 6-01-10
Graphic symbol
2×120mmAl
N~50H.380T
Form 1
Form 2
JB/T5872—1991
Continued Table 7
Text symbols
Example: three conductors
Example: three conductors
More situations can be expressed in the following way: Note above the horizontal line: current type, distribution system, rated power and voltage, etc.;
Note below the horizontal line:
The number of conductors in the circuit multiplied by the cutting area of each conductor. If the areas of the conductors are not uniform, use a plus sign to separate them.
Wire materials can be represented by their chemical element symbols
Example, DC circuit, 110V, two aluminum wires, wire cross-sectional area is 120mm
Example, three-phase AC circuit, 50Hz, 380V, three wires are all 120mm, neutral wire cross-sectional area is 50mm
Dyed soft wire
Shielded wire
Twisted wire (two strands are shown)
Wires in cable (three strands are shown)||tt ||03—01—02
03—01-03
03-01-04
03-01-05
03-01-06
03-01-07
03-01-08
03-01-09
03-01-10
JB/T5872--1991
6.2 For the graphic symbols and text symbols for the connection of terminals and wires, see Table 8. Table.8
06-02-01
06-02-02
06-02-03
06-02-04
06-02-05
06-02-06
06-02-07
06-02-08
0 6-02-09
06-02-10
06-02-11
06-02-12
06-02-13
06-02-14
06-02-15
Graphic symbols
Form 1
Form 2||tt| |Form 1
Form 2
Text symbol
Connection of wires
Note: When necessary, it can be drawn as a round black dot
Removable terminal
Terminal board (showing the terminal board with wire end mark)
Connection of wires
Multi-line connection of wires
Example: Cross-connection of wires (point) Multi-line representation
Example: Intersection connection of wires (point) Single-line representation
Branching and merging of wires or cables
Unconnected wires (crossing)
Example: Single-line representation
Example: Multi-line representation
Direct connection of wires
Wire joint
Note: If necessary, the circle can be drawn as a circle with black dots
03-02-01
03-02-02
03-02-10
03-02-03
03-02-04
03-02-05
03-02-06
03-02 -07
03-02-08
03-02-09
03-02-11
03-02-12
03-02-13
03-02-14
03-02-15
JB/T5872-1991|| tt| |The graphic symbols and text symbols of connecting devices are shown in Table 9. 6.3
06-03-01
06-03-02
06-03-03
06-03-04
06-03-05
06-03-06
06-03-07
06-03-08
06-03-09
Graphic symbols
Preferred type
Other types
Preferred type
Other types
Text symbols
The graphic symbols and text symbols of cable accessories are shown in Table 10. Talk
Socket (inner hole) or one pole of the socket Plug (convex head) or one pole of the plug Plug and socket (convex head and inner hole
Connecting piece
Disconnecting piece
Switching piece
06-04-01
06-04-02
06-04-03
06-04-04
Graphic symbol
Text character No.
Rope tight terminal (shown with a three-core cable)
Multi-line representation
Single-line representation
Cable terminal that does not require the number of cable cores to be indicated
Cable sealed terminal
(shown with three single-core cables)
03-03-01
03-03-02
03-03-03
03-03-04||tt ||03-03-05
03-03-06
03-03-20
03-03-22
03-04-01
03-04-02
03-04-03
03-04-04
06-04-05
06-04-06
06-04-07
06-04-08
06-04-09
7 Passive components
Graphic symbols
JB/T5872-1991
Continued Table 10
Text symbols
Cable through-junction box
(shown with three conductors)
Graphic symbols for resistors, text symbols see Table 11. 7.1
07-01-01||tt| |07-01-02
.07-01-03
07-01-04
07-01-05
Graphic symbols
Preferred form
Other forms
Multi-line representation
Single-line representation
Cable connection box, cable junction box (shown with three-conductor T-connection)
Multi-line representation
Single-line representation||tt| |Electrical air-tight casing (shown with three electrodes, the long side of the trapezoid is the high voltage side)
Text symbol
General symbol of resistor
Variable resistor
Adjustable resistor
Non-linear resistor
Varistor
Variator
Note: U can be replaced by V
03-04-05
03-04-05
03-04 -07 | -01-08
07-01-09
07-01-1 0
07-01-11
07-01-12
Graphic symbols
JB/T5872--1991
Continued Table 11
Text symbols
7.2 The graphic symbols and text symbols of heating devices are shown in Table 12. Sequence
07-02-01
Graphic symbols
The graphic symbols and text symbols of capacitors are shown in Table 13. No.
07-03-01
07-03-02
Graphic symbol
Preferred type
Other types
Thermal resistor
Note: 9 can be replaced by t
Slide-wire variable resistor
0.125W resistor
0.25W electrical appliance
0.5W resistor
1W resistor
Note, resistors greater than 1W are indicated by Arabic numerals
Shunter
Resistors with shunt and voltage dividing terminals
Text symbols
Heating element
Insulation heating element
Dehumidification heating element
Text symbols
General symbols for electrical appliances
Equalizing capacitor
Note: If it is necessary to distinguish the electrodes of the same capacitor, the arc-shaped plates indicate:
① In the enclosed paper dielectric and ceramic dielectric
Material capacitor In the capacitor, it represents the outer electrode
②In the adjustable and variable capacitor
Represents the moving plate electrode
②In the feedthrough capacitor, it represents the low potential electrode
04-01-05
04-01-11
04-01-06
04-01-07
04-01-08
04-01-09
04-01-15
04-01-17
04-02-01
04-02-02
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