F
Double spark gap
A spark gap form with two gaps sharing a common electrode, used to protect two conductors against a common earth.
IEC
IEEE / ANSI · F
ANSI/IEEE Double spark gap form
IEEE-library form of double spark gap: a spark gap form with two gaps sharing a common electrode, used to protect two conductors against a common earth.
In plain English
What does ANSI/IEEE Double spark gap form mean?
This reference locates double spark gap in Autodesk's IEEE-oriented miscellaneous family. The double spark gap places two gaps in one element, typically from each of two line conductors to a common centre electrode that is earthed. It protects a pair of conductors, such as a telecom pair, with a single component so that both lines are diverted together. The public library uses HFU1_S00372 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
A simple example
Use the surrounding circuit labels and the project legend to identify the intended operating condition and connection. Carry the same device reference into the schedule or equipment document so the symbol can be reconciled with its real terminals, function and operating limits.
What the drawings help you do
The symbol does not state breakdown voltages or whether both gaps are matched. If one gap breaks down before the other, a transverse voltage can appear across the protected pair. Check the product data where balanced breakdown matters. Identify the common electrode connection to earth. A double spark gap protects two conductors to a common electrode; a single spark gap protects one path. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
This particular reference
IEEE-library form of double spark gap: a spark gap form with two gaps sharing a common electrode, used to protect two conductors against a common earth. A double spark gap protects two conductors to a common electrode; a single spark gap protects one path.
- Terminal
- An identified point where a conductor connects.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: Autodesk IEEE Symbol Preview — Miscellaneous
IEEE / ANSI · Spark Gap, Double
Autodesk IEEE Symbol Preview: Miscellaneous, block HFU1_S00372. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · F
What it represents
This reference locates double spark gap in Autodesk's IEEE-oriented miscellaneous family. The double spark gap places two gaps in one element, typically from each of two line conductors to a common centre electrode that is earthed. It protects a pair of conductors, such as a telecom pair, with a single component so that both lines are diverted together. The public library uses HFU1_S00372 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
Use the surrounding circuit labels and the project legend to identify the intended operating condition and connection. Carry the same device reference into the schedule or equipment document so the symbol can be reconciled with its real terminals, function and operating limits.
The symbol does not state breakdown voltages or whether both gaps are matched. If one gap breaks down before the other, a transverse voltage can appear across the protected pair. Check the product data where balanced breakdown matters. Identify the common electrode connection to earth. A double spark gap protects two conductors to a common electrode; a single spark gap protects one path. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
How to read it
- Identify the common electrode connection to earth.
- Check breakdown matching between the two gaps.
Information to show or reference
- Show both line connections and the common earth.
- State breakdown voltage.
- Keep the earth lead short.
A distinction that matters
A double spark gap protects two conductors to a common electrode; a single spark gap protects one path.
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
Public IEEE-oriented Miscellaneous table explicitly lists HFU1_S00372 as Spark Gap, Double. This supports the vendor convention context, not reproduction of the publisher graphic.
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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