SA
Surge arrester
A surge arrester diverts a documented surge-related current through its protective path.
SLD / Schematic
IEEE / ANSI · SA
ANSI/IEEE surge arrester symbol
IEEE-oriented surge arrester symbol connected between a line and ground to limit transient overvoltage.
In plain English
What does ANSI/IEEE surge arrester mean?
Single-line diagrams in US practice show the surge arrester between a phase conductor and ground, commonly at transformer terminals, cable risers and line entrances. The publisher's IEEE miscellaneous preview lists a surge diverter or lightning arrester form, the counterpart of the existing IEC page.
A simple example
This illustration explains the connection and is not the IEEE graphic. Arrester class, rated and continuous operating voltages and energy capability come from the equipment data. Lead length between the arrester and protected equipment matters greatly and is not visible on a single-line diagram.
What the drawings help you do
Check arrester location relative to the protected equipment. Read voltage rating against system earthing. A surge arrester limits overvoltage; a spark gap is a simpler breakdown element with no valve resistor.
This particular reference
IEEE-oriented surge arrester symbol connected between a line and ground to limit transient overvoltage. A surge arrester limits overvoltage; a spark gap is a simpler breakdown element with no valve resistor.
- Winding
- A coil of conductor inside an electrical machine or transformer.
- Phase
- One of the related AC waveforms in a power system.
- Terminal
- An identified point where a conductor connects.
Read the source: Autodesk IEEE Symbol Preview — Miscellaneous · IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
IEEE / ANSI · Autodesk IEEE-oriented surge diverter form
Autodesk publishes this block under IEEE Symbol Preview: Miscellaneous. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · SA
What it represents
Single-line diagrams in US practice show the surge arrester between a phase conductor and ground, commonly at transformer terminals, cable risers and line entrances. The publisher's IEEE miscellaneous preview lists a surge diverter or lightning arrester form, the counterpart of the existing IEC page.
This illustration explains the connection and is not the IEEE graphic. Arrester class, rated and continuous operating voltages and energy capability come from the equipment data. Lead length between the arrester and protected equipment matters greatly and is not visible on a single-line diagram.
How to read it
- Check arrester location relative to the protected equipment.
- Read voltage rating against system earthing.
Information to show or reference
- State arrester class and voltage rating.
- Show the ground connection.
- Keep arrester leads short in layout.
A distinction that matters
A surge arrester limits overvoltage; a spark gap is a simpler breakdown element with no valve resistor.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — Miscellaneous
Exact public IEEE-oriented category page listing the surge diverter form.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
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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