IEC TR 63358-1:2023

IEC TR 63358-1 ®
Edition 1.0 2023-02
TECHNICAL
REPORT
colour
inside
Graphical symbols for diagrams –
Part 1: General, qualifying and generic symbols
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IEC TR 63358-1 ®
Edition 1.0 2023-02
TECHNICAL
REPORT
colour
inside
Graphical symbols for diagrams –

Part 1: General, qualifying and generic symbols

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 01.080.10 ISBN 978-2-8322-6436-2

– 2 – IEC TR 63358-1:2023  IEC 2023
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Classification of graphical symbols . 7
4.1 General symbols . 7
4.2 Qualifying symbols . 20
4.3 Generic symbols for common use . 40
Bibliography . 46

Figure 1 – Relationship among types of graphical symbols for diagrams . 5

Table 1 – Examples of general symbols applicable in all domains . 7
Table 2 – Examples of applicable general symbols specific to binary logic elements . 17
Table 3 – Examples of qualifying symbols . 20
Table 4 – Examples of generic symbols . 41

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GRAPHICAL SYMBOLS FOR DIAGRAMS –

Part 1: General, qualifying and generic symbols

FOREWORD
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IEC TR 63358-1 has been prepared by IEC technical committee 3: Documentation, graphical
symbols and representations of technical information. It is a Technical Report.
The text of this Technical Report is based on the following documents:
Draft Report on voting
3/1488/DTR 3/1539/RVDTR
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Report is English.
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at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.

– 4 – IEC TR 63358-1:2023  IEC 2023
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INTRODUCTION
Initial work was done by TC 3 Maintenance Team 60617 with the aim to clarify the terminology
used in the naming of some of the graphical symbols for diagrams standardized in IEC 60617.
This document also highlights improved naming of some graphical symbols categorized
according to the concepts of generic symbol, general symbol and qualifying symbol, where the
symbol "name" is recognized as giving a short description of the meaning of the graphical
symbol for diagrams. Figure 1 provides the relationship among types of graphical symbols for
diagrams.
Figure 1 – Relationship among types of graphical symbols for diagrams

– 6 – IEC TR 63358-1:2023  IEC 2023
GRAPHICAL SYMBOLS FOR DIAGRAMS –

Part 1: General, qualifying and generic symbols

1 Scope
This document contains, by way of example, a collection of generic symbols, general symbols
and qualifying symbols for diagrams taken from IEC 60617. Some of the wording of entries in
the IEC 60617 database are annotated and/or modified for the purpose of clarification. Existing
symbols in the IEC 60617 database are classified according to the classification proposed in
this document.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
graphical symbol
visually perceptible figure with a particular meaning used to transmit information independently
of language
Note 1 to entry: The graphical symbol may represent objects of interest, such as products, functions or requirements
for manufacturing, quality control, etc.
Note 2 to entry: A graphical symbol is not to be confused with the simplified representation of products which is
normally drawn to scale and which can look like a graphical symbol.
[SOURCE: ISO 81714-1:2010, 3.1]
3.2
basic symbol
graphical symbol representing a defined concept, applicable for use in diagrams
Note 1 to entry: A basic symbol can be:
– used alone; or
– qualified by qualifying symbols or other basic symbols; or
– used as a qualifier to another basic symbol.
3.3
general symbol
basic symbol that forms the basis for other basic symbols representing the same main concept
but with different specific characteristics

Note 1 to entry: IEC 60617 graphical symbols S00001, S00227, S00457, S00555, S00567, S00583, S00641,
S00841, and S00842 are examples of the concept of "general symbol".
3.4
qualifying symbol
graphical symbol applicable only for providing additional information to a basic symbol
Note 1 to entry: IEC 60617 categories "Qualifiers only" and "Functional attribute only" provide a list of qualifying
symbols, e.g., S00077, S00120 and S00223.
3.5
generic symbol
graphical symbol that represents a main concept and is intended to be adapted with characters,
qualifying symbols or basic symbols when being applied
Note 1 to entry: IEC 60617 graphical symbols S00066, S00819, S00910, S00911, S00912, S01870, S01921 are
examples of the concept of "generic symbol".
3.6
name
short description of the meaning of the graphical symbol for diagram
[SOURCE: IEC 60617, General description, modified – the introductory "a" has been removed,
and "meaning of the symbol" has been replaced with "meaning of the graphical symbol for
diagram".]
4 Classification of graphical symbols
4.1 General symbols
General symbols are the bases for a set of other basic symbols representing the same main
concept but with different specific characteristics. Table 1 provides examples of general
symbols for concepts applicable to all domains, for use in diagrams. Table 2 provides examples
of general symbols for the domain of binary logic elements.
NOTE In Table 1 and Table 2, the column with the heading "Name" of graphical symbols sometimes includes
additional wording after the comma which is not included in IEC 60617 at the time of publication of this document.
Such additional wording will form part of the information to be used when a complete maintenance of IEC 60617
takes place. It is useful to keep consistency of naming. Therefore, any additions or deletions are highlighted in red.
Table 1 – Examples of general symbols applicable in all domains
Symbols ID Name
S00001 Connection, general symbol

S00031 Contact, female (of a soc
...