AT 3PH Y
Three-phase star autotransformer
A three-phase star-connected autotransformer has electrically shared winding portions arranged in a three-phase star connection.
SLD / Schematic
IEEE / ANSI · AT 3PH Y
ANSI/IEEE Three-phase star autotransformer form
IEEE-library reference for three-phase star autotransformer, with its operating meaning, connection notes and public vendor block identity.
In plain English
What does ANSI/IEEE Three-phase star autotransformer form mean?
This reference locates three-phase star autotransformer in Autodesk's IEEE-oriented transformers family. A three-phase star-connected autotransformer has electrically shared winding portions arranged in a three-phase star connection. Its neutral and tap connections need explicit identification. The public library uses HXF1T19 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
Determine how the common star point and any accessible neutral are used by the design. A star autotransformer is electrically different from a star-star two-winding transformer. 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 reference for three-phase star autotransformer, with its operating meaning, connection notes and public vendor block identity. A star autotransformer is electrically different from a star-star two-winding transformer.
- 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 — Transformers
IEEE / ANSI · 3 Phase Autotransformer Star Connected
Autodesk IEEE Symbol Preview: Transformers, block HXF1T19. 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 · AT 3PH Y
What it represents
This reference locates three-phase star autotransformer in Autodesk's IEEE-oriented transformers family. A three-phase star-connected autotransformer has electrically shared winding portions arranged in a three-phase star connection. Its neutral and tap connections need explicit identification. The public library uses HXF1T19 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.
Determine how the common star point and any accessible neutral are used by the design. A star autotransformer is electrically different from a star-star two-winding transformer. 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
- Determine how the common star point and any accessible neutral are used by the design.
- 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
- Show star point
- State winding voltage ratios
- Reference tap terminals
A distinction that matters
A star autotransformer is electrically different from a star-star two-winding transformer.
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 — Transformers
Public IEEE-oriented Transformers table explicitly lists HXF1T19 as 3 Phase Autotransformer Star Connected. 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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