TX
Power transformer
Equipment transferring electrical power between winding circuits.
SLD / Schematic
Symbols · TX Y-D
Star-delta transformer
A star-delta transformer connects one winding set in star and the other in delta.
SLD / Schematic · TX Y-D
What it represents
A star-delta transformer connects one winding set in star and the other in delta. The notation identifies winding topology; a clock-number or equivalent phase-displacement designation is still needed where system phase relationships matter.
How to read it
- Read which side is star from the declared primary and secondary labels.
- 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 winding sides
- State complete vector group
- Show neutral availability
A distinction that matters
Y-D topology alone does not specify a complete transformer vector group.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Power, potential and autotransformer symbols
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic.
AutoCAD Electrical: Three-phase transformer connections
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source 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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