TX Y-Y
Star-star transformer
A star-star transformer has star-connected windings on both sides.
SLD / Schematic
IEEE / ANSI · TX Y-Y
ANSI/IEEE Star-star transformer form
IEEE-library form of star-star transformer: a star-star transformer has star-connected windings on both sides.
In plain English
What does ANSI/IEEE Star-star transformer form mean?
This reference locates star-star transformer in Autodesk's IEEE-oriented 3 phase transformers family. A star-star transformer has star-connected windings on both sides. Neutral accessibility and system earthing must be shown independently for each winding. The public library uses HXF1T7 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 whether one, both or neither star point is brought to terminals. The Y-Y label does not by itself establish neutral availability. 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 star-star transformer: a star-star transformer has star-connected windings on both sides. The Y-Y label does not by itself establish neutral availability.
- 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 Star/Star
Autodesk IEEE Symbol Preview: 3 Phase Transformers, block HXF1T7. 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 Y-Y
What it represents
This reference locates star-star transformer in Autodesk's IEEE-oriented 3 phase transformers family. A star-star transformer has star-connected windings on both sides. Neutral accessibility and system earthing must be shown independently for each winding. The public library uses HXF1T7 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 whether one, both or neither star point is brought to terminals. The Y-Y label does not by itself establish neutral availability. 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 whether one, both or neither star point is brought to terminals.
- 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
- Identify neutral terminals
- State vector group
- Show earthing connections
A distinction that matters
The Y-Y label does not by itself establish neutral availability.
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 HXF1T7 as 3 Phase Star/Star. 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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