Comitato Elettrotecnico Italiano

Representation of states of objects by graphical symbols
 N EN 62744

Annotation

This international standard provides generic rules for the representation of states of objects by graphical symbols standardized in IEC 60617, ISO 14617, IEC 60417, for example, and for future graphical symbols included in these standards.

NOTE 1 Graphical symbols in IEC 60617, ISO 14617 and IEC 60417 are mostly presented with a single graphic, not representing the different operational states of objects occurring during their life cycle, e.g. in operation, of the object that the graphical symbol represents.

NOTE 2 The graphical symbols in IEC 60617 and ISO 14617 are

– at the time of writing of the first edition of this standard

– generally shown in the operational state “not energized”.

NOTE 3 Within the different periods of an object within its life cycle, i.e. design, manufacturing, operation, disposal, each period counts with different states. However, this standard focuses only on those states occurring during the active operation period from an object put into service until it is taken out of service.

This horizontal standard has the purpose of:

• ensuring the coherence of the corpus of standardization documents;

• avoiding duplication of work and contradictory requirements.

The standard provides operational states of an object as examples that typically occur and which need to be represented by standardized graphical symbols and defines generic rules to be applied. It specifies which types of presentation facilities are recommended to present the different operational states to humans. States concerning the different types of alarm, their classification and management are not dealt with in this standard. This standard does neither define rules for the design of static graphical symbols for diagrams as provided in IEC 61082 and the ISO/IEC 81714 series nor for icons and graphical symbols for use on equipment as provided in IEC 60417, ISO 7000 and in the ISO/IEC 11581 series.