TS 11332

TS 11332 defines graphical symbols for electrotechnical diagrams with a focus on switchgear, controlgear and protective devices. The standard addresses the symbol language used to make the function and relationships of these devices clear in schematic representations, helping create a consistent visual notation across circuit diagrams, control diagrams and protection arrangements.

The schematic language of switching, control and protection devices

In general technical terms, switching devices open, close or redirect circuits; controlgear operates a system through commands for starting, selecting or governing its behaviour; and protective devices help safeguard a circuit or equipment under fault conditions. Graphical symbols in this field emphasize function and connection logic rather than the detailed physical shape of the device. That is why choosing the correct symbol matters for readability and for consistent interpretation by different teams.

What this standard covers

Based on the stated scope, TS 11332 covers graphical symbols for devices used in switchgear, controlgear and protective devices. In other words, it focuses less on the internal operating principles of each device and more on how those devices are represented in electrotechnical diagrams. Standards of this kind support consistent use of symbols in design, maintenance, manufacturing and documentation, while reducing ambiguity in drawings.

• Focuses on graphical symbols used in electrotechnical diagrams.
• Covers the schematic representation of devices in switching, control and protection arrangements.
• Emphasizes functional depiction rather than physical appearance.
• Helps establish a common and consistent visual language across diagrams.