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GB/T 6988.1-2024Preparation of documents used in electrotechnology - Part 1: Rules (English PDF)

电气技术用文件的编制第1部分：规则

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

September 29, 2024

Implementation date

April 1, 2025

Scope

GB/T 6988.1-2024 is the English-translated version of 电气技术用文件的编制第1部分：规则.

GB/T 6988.1-2024 is the Chinese standard "Preparation of documents used in electrotechnology - Part 1: Rules". Its scope clause reads: This document establishes general rules and guidelines for the representation of information in documents of electrotechnology, and provides specific rules for diagrams, drawings and tables used in electrotechnology.

This document does not cover rules and guidelines for the production of audio, video or tactile presentations. This horizontal document is primarily intended for use by technical committees in the preparation of standards on the basis of the drafting rules of IEC Guide 108.

One of the responsibilities of a technical committee is to use horizontal documents in the preparation of its publications, unless it is clearly stated in the publication that they are not applicable or the contents of this horizontal document are not applicable.

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Document preview — GB/T 6988.1-2024

National Standard of the People's Republic of China

ICS: 29.020
Classification: K04

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
3.1 Basic terms
3.2 Terms related to forms of representation of information
3.3 Terms related to specific document kinds
4 Principles of documentation
4.1 General principles
4.2 Structure of documentation
4.3 Representation of information
4.4 Identification and designation of documents
5 Rules for the representation of information
5.1 Legibility
5.2 Direction of text
5.3 Colour, shading and patterns
5.4 Size of drawing sheets
5.5 Reproduction of drawings
5.6 Identification of pages
5.7 Page layout
5.8 Cross-references
5.9 Hyperlinks
5.10 Line widths
5.11 Lettering
5.12 Symbols
5.13 Scale
5.14 Representation of pictures
5.15 Quantities, units, values and colour codes
5.16 Representation of ranges and sequences of elements
5.17 Dimension lines
5.18 Leader lines and reference lines
5.19 Explanatory notes and markings
5.20 Object designations
5.21 Terminal designations
5.22 Signal designations
6 Document kinds
7 Diagrams
7.1 General
7.2 Overview diagrams
7.3 Function diagrams
7.4 Circuit diagrams
7.5 Connection diagrams
8 Drawings
8.1 General
8.2 Requirements for basic documents
8.3 Arrangement drawings
9 Tables
9.1 General
9.2 Representation of reference designations
9.3 Connection tables
10 Charts
10.1 General
10.2 Function charts
10.3 Sequence charts and time sequence charts
11 Composition of documents
11.1 General
11.2 Representation of object types in diagrams
11.3 References
11.4 Document metadata
12 Requirements for CAx conformity
Annex A (normative) Method for creating symbols for objects not available in IEC 60617
A.1 General
A.2 Example - Miniature circuit-breaker
A.3 Example - Miniature circuit-breaker with RCD (residual current device)
A.4 Example - RCD (residual current protective device)/RCM (residual current monitor)
A.5 Example - PLC
Annex B (informative) Document management information and title block
B.1 Representation of document management information
B.2 Example of title block layout
B.3 Example of location of identification areas
Annex C (informative) Document kind designations and information content
Bibliography

Foreword

This document is drafted in accordance with the rules given in GB/T 1.1-2020 Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document is Part 1 of GB/T 6988 Preparation of documents used in electrotechnology. The following parts of GB/T 6988 have been published:

- Part 1: Rules;

- Part 5: Index.

This document replaces GB/T 6988.1-2008 Preparation of documents used in electrotechnology - Part 1: Rules. Compared with GB/T 6988.1-2008, apart from structural adjustments and editorial changes, the main technical changes are as follows:

a) the term "data medium" has been deleted (see 3.1.1 of the 2008 edition);

b) the term "object designation" has been added (see 3.1.7);

c) the content area has been changed (see 5.7.3; 5.7.3 of the 2008 edition);

d) cross-references have been changed (see 5.8; 5.7.3 of the 2008 edition);

e) hyperlinks have been changed (see 5.9; 5.9 of the 2008 edition);

f) object designations have been changed (see 5.20; 5.20 of the 2008 edition);

g) the representation of cross-references related to the detached representation method has been changed (see 7.1.2.4; 7.1.2.4 of the 2008 edition);

h) wireless connections have been changed (see 7.1.3.3; 7.1.3.3 of the 2008 edition);

i) letter codes for the mounting of components have been added (see 8.3).

This document is identical to IEC 61082-1:2014 Preparation of documents used in electrotechnology - Part 1: Rules.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

This document was proposed by and is under the jurisdiction of the National Technical Committee on Electrical Information Structures, Documentation and Graphical Symbols of Standardization Administration of China (SAC/TC 27).

Drafting organizations of this document: China Machinery Productivity Promotion Center Co., Ltd., Economic and Technological Research Institute of State Grid Sichuan Electric Power Company, PowerChina Beijing Engineering Corporation Limited, China Machinery Research Institute of Standards and Technology (Beijing) Co., Ltd., Electrical Chain (Xiamen) Information Technology Co., Ltd., Ningbo Polytechnic, Donghua Engineering Technology Co., Ltd., Institute of Electronic Engineering of China Academy of Engineering Physics, China Institute of Building Standard Design and Research Co., Ltd., Guangzhou Yangcheng Electrical Equipment Co., Ltd., State Energy Group Jiangsu Electric Power Co., Ltd., Huangshan Ruixing Automotive Electronics Co., Ltd., Schneider Electric Information Technology (China) Co., Ltd., Guoneng Jiangsu Electric Power Engineering Technology Co., Ltd., Sichuan Zhongke Hengchuang Technology Co., Ltd., Guanxian Vocational Education Center School, Shenzhen Zhongkeyuan Electronics Co., Ltd., Qingdao Nengfeng Electric Co., Ltd., Xiamen Yike Electronics Co., Ltd., PowerChina Jiangxi Electric Power Design Institute Co., Ltd., Omega Jiabao (Zhuhai) Switchgear Co., Ltd., Minpu Electric Group Co., Ltd., Guangzhou Hansen Architectural Design Co., Ltd.

The previous editions of this document and of the documents it replaces are as follows:

- first published in 1986 as GB/T 6988.1, first revised in 1997;

- second revision in 2008, replacing GB/T 6988.1 to 6988.3-1997 and GB/T 6988.4-2002 (the previous editions of GB/T 6988.2 to 6988.3-1997: first published in 1986 as GB/T 6988.2 to 6988.3, each first revised in 1997; the previous editions of GB/T 6988.4-2002: first published in 1986 as GB/T 6988.4, first revised in 2002);

- this is the third revision.

Introduction

GB/T 6988 deals with how information in documents is represented; part of this information is already described in other standards. Figure 1 shows the interrelations between some of these standards.

GB/T 6988 is intended to consist of the following parts:

- Part 1: Rules. The purpose is to specify general rules and guidelines for the representation of information in documents of electrotechnology.

- Part 5: Index. The purpose is to provide an index of the contents of GB/T 6988.1 to 6988.4.

Figure 1 - Overview of standards related to the representation of information in documents

The examples in this document are intended to illustrate the given rules and do not necessarily represent complete documents.

1 Scope

This document establishes general rules and guidelines for the representation of information in documents of electrotechnology, and provides specific rules for diagrams, drawings and tables used in electrotechnology.

This document does not cover rules and guidelines for the production of audio, video or tactile presentations.

This horizontal document is primarily intended for use by technical committees in the preparation of standards on the basis of the drafting rules of IEC Guide 108.

2 Normative references

The contents of the following documents constitute, through normative references in the text, indispensable provisions of this document. For dated references, only the edition corresponding to that date applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 26853.1-2011 Classification and designation of documents for plants, systems and equipment - Part 1: Rules and classification tables (IEC 61355-1:2008, IDT)

IEC 60027 (all parts) Letter symbols to be used in electrical technology

IEC 60375 Conventions concerning electric circuits

IEC 60617 Graphical symbols for diagrams

Note: GB/T 4728 (all parts) Graphical symbols for electrical diagrams (IEC 60617, IDT)

IEC 60757 Code for designation of colours

Note: GB/T 13534-2009 Code for designation of colours (IEC 60757:1983, IDT)

IEC 60848 GRAFCET specification language for sequential function charts

Note: GB/T 21654-2008 GRAFCET specification language for sequential function charts (IEC 60848:2002, IDT)

IEC 61175 Industrial systems, installations and equipment and industrial products - Designation of signals

Note: GB/T 16679-2009 Industrial systems, installations and equipment and industrial products - Designation of signals (IEC 61175-1:2015, IDT)

IEC 61293 Marking of electrical equipment with ratings related to electrical supply - Safety requirements

Note: GB/T 17285-2022 Marking of electrical equipment with ratings related to electrical supply - Safety requirements (IEC 61293:2019, IDT)

IEC 61666 Industrial systems, installations and equipment and industrial products - Identification of terminals within a system

Note: GB/T 18656-2002 Industrial systems, installations and equipment and industrial products - Identification of terminals within a system (IEC 61666:1997, IDT)

IEC 62023 Structuring of technical information and documentation

Note: GB/T 19529-2004 Structuring of technical information and documentation (IEC 62023:2000, IDT)

IEC 62027 Preparation of object lists, including parts lists

Note: GB/T 19045-2003 Preparation of parts lists (IEC 62027:2000, IDT)

IEC 62491 Industrial systems, installations and equipment and industrial products - Labelling of cables and cores

Note: GB/T 30085-2013 Industrial systems, installations and equipment and industrial products - Labelling of cables and cores (IEC 62491:2008, IDT)

IEC 81346-1 Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 1: Basic rules

Note: GB/T 5094.1-2018 Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 1: Basic rules (IEC 81346-1:2009, IDT)

IEC 81346-2 Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 2: Classification of objects and codes for classes

Note: GB/T 5094.2-2018 Industrial systems, installations and equipment and industrial products - Structuring principles and reference designations - Part 2: Classification of objects and codes for classes (IEC 81346-2:2009, IDT)

IEC 81714-2:2006 Design of graphical symbols for use in the technical documentation of products - Part 2: Specification for graphical symbols in a computer sensible form, including graphical symbols for a reference library, and requirements for their interchange

Note: GB/T 16901.2-2013 Rules for the representation of graphical symbols for use in technical documentation - Part 2: Specification for graphical symbols (including graphical symbols for a reference library) in computer electronic file format and requirements for their interchange (IEC 81714-2:2006, MOD)

IEC 82045-1 Document management - Part 1: Principles and methods

IEC 82045-2 Document management - Part 2: Metadata elements and information reference model

IEC/IEEE 82079-1 Preparation of information for use (instructions for use) of products - Part 1: Principles and general requirements

Note: GB/T 19678.1-2018 Preparation of instructions for use - Structuring, content and presentation - Part 1: General principles and detailed requirements (IEC 82079-1:2012, IDT)

ISO 128-2 Technical product documentation (TPD) - General principles of presentation - Part 2: Basic conventions for lines

Note: The content of ISO 128-2 cited has no technical difference from the content of ISO 128-22 cited.

ISO 128-3 Technical product documentation (TPD) - General principles of presentation - Part 3: Views, sections and cuts

Note: The content of ISO 128-3 cited has no technical difference from the content of ISO 128-30 cited.

ISO 2594 Building drawings - Projection methods

ISO 3098-5 Technical product documentation - Lettering - Part 5: CAD lettering of the Latin alphabet, numerals and marks

Note: GB/T 18594-2001 Technical product documentation - Lettering - CAD lettering of the Latin alphabet, numerals and marks (ISO 30985-5:1997, IDT)

ISO 5456-2 Technical drawings - Projection methods - Part 2: Orthographic representations

ISO 5457:1999 Technical product documentation - Sizes and layout of technical drawing sheets

Note: GB/T 14689-2008 Technical drawings - Sizes and formats of drawing sheets (ISO 5457:1999, MOD)

ISO 81714-1 Design of graphical symbols for use in the technical documentation of products - Part 1: Basic rules

Note: GB/T 16901.1-2008 Rules for the representation of graphical symbols for use in technical documentation - Part 1: Basic rules (ISO 81714-1:1999, MOD)

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1 Basic terms

3.1.1 document

Fixed and structured amount of information intended for human perception that can be managed and interchanged as a unit between users and systems.

Note 1: "Document" is not limited to its meaning in a legal sense.

Note 2: A document can be designated in accordance with the type of information and the form of presentation, for example overview diagram, connection table, function chart.

[Source: ISO/IEC 8613-1:1994, 3.58, modified - Notes 1 and 2 added]

3.1.2 document kind

Type of document defined with respect to its specified content of information and form of presentation.

Note: The term "document type" is sometimes used for the same concept.

[Source: GB/T 26853.1-2011, 3.6]

3.1.3 documentation

Collection of documents related to a given object.

Note 1: Documentation can include technical documents, commercial documents and/or other documents.

Note 2: In IEC 81346 or other publications, "documentation" can refer to an object.

Note 3: A documentation can be composed of documents, composite documents and document sets.

Note 4: The number and kinds of documents included in a documentation can differ according to different purposes.

[Source: GB/T 26853.1-2011, 3.5]

3.1.4 database

Collection of data organized according to a conceptual structure describing the characteristics of the data and the relationships among their corresponding entities, supporting one or more application areas.

[Source: ISO/IEC 2382:2015, 2121413]

3.1.5 hyperlink

Active link from one location in a document to another location (in the same document or in a different document).

Note 1: A hyperlink can be activated only when the document is managed by a computer.

Note 2: A hyperlink represents a connection that the user can activate to another point.

3.1.6 object

Entity treated in a process of development, implementation, usage and disposal.

Note 1: An object can refer to a physical or non-physical "thing", i.e. anything that might exist, exists or did exist.

Note 2: An object has information associated with it.

[Source: GB/T 5094.1-2018, 3.1]

3.1.7 object designation

Identifier of a specific object within a given context.

Note: Examples of such designations are reference designations, type designations, serial numbers and names.

[Source: GB/T 26853.1-2011, 3.13]

3.1.8 reference designation

Identifier of a specific object formed with respect to the system of which the object is a constituent, based on one or more aspects of that system.

[Source: GB/T 5094.1-2018, 3.11]

3.1.9 single-level reference designation

Reference designation assigned with respect to the system of which the specific object is a direct constituent in one aspect.

Note: A single-level reference designation does not include any reference designation of a superior or subordinate object.

[Source: GB/T 5094.1-2018, 3.12]

3.1.10 reference designation set

Set of reference designations in which two or more reference designations are assigned to one object, of which at least one unambiguously identifies the object concerned.

[Source: GB/T 5094.1-2018, 3.14]

3.1.11 product

Intended or accomplished result of labour, or of a natural or artificial process.

[Source: GB/T 5094.1-2018, 3.6]

3.1.12 component

Product used as a constituent in an assembled product, system or plant.

[Source: GB/T 5094.1-2018, 3.7]

3.2 Terms related to forms of representation of information

3.2.1 drawing form

Representation of information by graphical means.

3.2.2 pictorial form

Representation of information by means of an image or a complete geometric description without regard to the actual projection relations.

Note: The pictorial form can be two-dimensional or three-dimensional.

3.2.3 textual form

Representation of information by characters and numbers.

3.2.4 drawing

Drawing form representing information mainly by showing objects and their relative positions to scale.

3.2.5 diagram

Drawing form representing information mainly by showing objects and their relationships by means of graphical symbols.

3.2.6 chart; graph

Drawing form representing mainly the relationship between two or more variables, operations or states.

[Source: ISO 10209-1:2022, 3.10.92]

3.2.7 table; list

Representation of information in the form of rows and columns.

Note 1: A list of contents is a special form of table.

Note 2: Table cells can have various forms of representation.

3.3 Terms related to specific document kinds

3.3.1 overview diagram

Diagram representing an object as a whole at a low level of detail.

3.3.2 function diagram

Diagram representing information on the functional characteristics of an object.

3.3.3 circuit diagram

Diagram representing information on the circuit composition and physical connections of an object.

3.3.4 connection diagram

Diagram representing information on the physical connections between the components or units of an object.

3.3.5 equivalent-circuit diagram

Function diagram representing information on a model of the electrical and/or magnetic behaviour of an object.

3.3.6 logic-function diagram

Function diagram using mainly symbols for binary logic elements.

3.3.7 arrangement drawing

Drawing representing information on the relative or absolute location of objects.

3.3.8 connection table

Table representing information on the physical connections between the components or units of an object.

3.3.9 sequence chart

Chart representing information on the sequence of operations or states between the units of a system.

3.3.10 time sequence chart

Sequence chart with the time axis drawn to scale.

4 Principles of documentation

4.1 General principles

Documentation is necessary for the processes of planning, design, manufacture, installation, commissioning, use, maintenance and disposal of a product or system.

The purpose of documentation is to provide information in the most appropriate form. In addition, documentation is a basic means of ensuring the safety, environmental and quality aspects required for the product or system.

Documentation is an important part of an equipment supply contract and a basic element in building after-sales service.

4.2 Structure of documentation

IEC 81346-1 states that information on a product or system can be organized in the form of a structure tree. Such a structure describes the way in which an object is subdivided into sub-objects, for example a program into sub-programs or a product into sub-products.

According to GB/T 26853.1-2011, a document should describe and be unambiguously associated with the relevant object. The relation between a document and the object it describes is usually established by using the designation of the object as part of the document designation.

Note: The object designation can be a reference designation (documents of an occurrence) or a type designation (documents of a type); see Clause 11 for details.

The use of structures enables information to be represented in levels, see IEC 62023. This means that the information is represented in parallel levels, each level representing a different degree of detail. For example, the documents of the object represented at the top node contain overall information on the whole system, while the documents of the other objects represent more detailed information on the sub-objects, see Clause 11.

The structuring principles also support design and manufacture based on the division of labour and on subcontracting. The manufacturer needs to provide all the information required for understanding and use, independently of external factors. The documentation of such components or subsystems can be integrated into any system at the level corresponding to the system structure.

4.3 Representation of information

The representation of information in documents shall be unambiguous and practical. This means that the same information may be represented in different documents in the same or different document kinds. The representation of this information in different places shall be coordinated and consistent.

When information is kept in a database independent of other forms of representation, this information shall, when required, be accessible in a form that is clear and meets the intended purpose, and suitable tools applying the standards shall be provided (see Figure 2).

Document kinds represent possible and predefined forms of representation (see GB/T 26853.1 and Annex C).

When information is stored in the form of documents, the rules of this document apply to the preparation of the documents, see Figure 3. Documents may be prepared by means of CAx systems or directly on paper or other media.

Figure 2 - Documents generated from information stored in a database

Figure 3 - Documents prepared and stored in a database

4.4 Identification and designation of documents

For its identification within a given context of use, each document shall have at least one unambiguous identifier. Since a document can be unambiguously identified within several contexts of use, the scope of application shall be explained in the document or in its supporting documentation.

Note 1: The context of use of the document is made explicit in the following ways:

- the organization responsible for the identification of the document, for example documents issued by a company;

- an internationally recognized document or article numbering system, for example ISBN, ISSN, EAN, UPC.

In order to relate the various parts of the documentation to the objects they describe, the designation of documents shall comply with the requirements of Clause 5 of GB/T 26853.1-2011.

Note 2: GB/T 26853.1-2011 requires the "object designation" and the "document kind classification code (DCC)" to form part of the document name. The object name described in GB/T 26853.1 is a reference designation in accordance with IEC 81346-1 or any other unambiguous identifier.

If an object designation is not a reference designation, it shall be clearly distinguished from any reference designation.

Remaining clauses in the full document

5 Rules for the representation of information
6 Document kinds
7 Diagrams
8 Drawings
9 Tables
10 Charts
11 Composition of documents
12 Requirements for CAx conformity
Annex A (normative) Method for creating symbols for objects not available in IEC 60617
Annex B (informative) Document management information and title block
Annex C (informative) Document kind designations and information content
Bibliography

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 87 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T · IEC 60027 · IEC 60375 · IEC 60617 · IEC 60757 · IEC 60848 · IEC 61175 · IEC 61293 · IEC 61666 · IEC 62023 · IEC 62027 · IEC 62491 · IEC 81346-1 · IEC 81346-2 · IEC 81714-2:2006 · IEC 82045-1 · IEC 82045-2 · IEC/IEEE · ISO 128-2 · ISO 128-3 · ISO 2594 · ISO 3098-5 · ISO 5456-2 · ISO 5457:1999 · ISO 81714-1

Cited by

Similar standards

GB 38031-2025|GB/T 6988.1|GB/T 6988.1-2008|GB/T 6988.1-1997|GB/T 6988.1-1986|GB/T6988.1-2024|GB/T 1.1-2020|GB/T 6988

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