TX D-D
Delta-delta transformer
A delta-delta transformer uses delta-connected windings on both sides.
SLD / Schematic
IEEE / ANSI · TX D-D
ANSI/IEEE Delta-delta transformer form
IEEE-library form of delta-delta transformer: a delta-delta transformer uses delta-connected windings on both sides.
In plain English
What does ANSI/IEEE Delta-delta transformer form mean?
This reference locates delta-delta transformer in Autodesk's IEEE-oriented 3 phase transformers family. A delta-delta transformer uses delta-connected windings on both sides. The drawing communicates the winding connections while the vector group and device ratings specify the actual transformer arrangement. The public library uses HXF1T13 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
A simple example
Trace each winding, supply and accessible neutral through the complete machine or transformer connection diagram. Keep the phase arrangement, terminal labels and any clock notation attached to the device; neither the convention label nor this educational outline supplies its ratings.
What the drawings help you do
Check phase-displacement notation when interconnecting supplies. Two delta windings do not provide a star neutral point. 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 delta-delta transformer: a delta-delta transformer uses delta-connected windings on both sides. Two delta windings do not provide a star neutral point.
- 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: 3 Phase Transformers
IEEE / ANSI · 3 Phase Delta/Delta
Autodesk IEEE Symbol Preview: 3 Phase Transformers, block HXF1T13. 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.
SLD / Schematic · TX D-D
What it represents
This reference locates delta-delta transformer in Autodesk's IEEE-oriented 3 phase transformers family. A delta-delta transformer uses delta-connected windings on both sides. The drawing communicates the winding connections while the vector group and device ratings specify the actual transformer arrangement. The public library uses HXF1T13 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
Trace each winding, supply and accessible neutral through the complete machine or transformer connection diagram. Keep the phase arrangement, terminal labels and any clock notation attached to the device; neither the convention label nor this educational outline supplies its ratings.
Check phase-displacement notation when interconnecting supplies. Two delta windings do not provide a star neutral point. 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
- Check phase-displacement notation when interconnecting supplies.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Label both winding voltages
- State vector group
- Reference protection CT connections
A distinction that matters
Two delta windings do not provide a star neutral point.
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: 3 Phase Transformers
Public IEEE-oriented 3 Phase Transformers table explicitly lists HXF1T13 as 3 Phase Delta/Delta. 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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