ES
Earthing switch
A switch used to connect an identified circuit section to earth.
SLD / Schematic
Protection functions · 57
Short-circuiting or grounding device
Makes a defined short-circuit or earth connection for the purpose shown in the machine or apparatus scheme.
SLD / Schematic · 57
What it represents
Makes a defined short-circuit or earth connection for the purpose shown in the machine or apparatus scheme.
In a drafting package, connect this reference to the conductors being shorted or earthed. The associated drawing should trace the operating mechanism and interlocks; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the conductors being shorted or earthed.
- Trace the operating mechanism and interlocks.
Information to show or reference
- Label the conductors being shorted or earthed.
- Cross-reference the operating mechanism and interlocks.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
The function number does not establish the making capacity or safe-use procedure of an earthing device.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
ANSI device-number and suffix reference table
Public manufacturer number/name association. Drafting explanations are independently written.
IEEE C37.2-2022: power-system device function numbers
Normative device-number publication; exact edition wording and compliance require the licensed standard.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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