Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

TX Y-Y

IEEE / ANSI

ANSI/IEEE Star-star transformer form

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.

Drawing use

SLD / Schematic

Application

Power distribution

Reference family

IEEE / ANSI / Manufacturer

Form evidence

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.

A distinction that matters

The Y-Y label does not by itself establish neutral availability.

Full referenceAdd to legend

TX Y-Y

Symbols

Star-star transformer

A star-star transformer has star-connected windings on both sides. Neutral accessibility and system earthing must be shown independently for each winding.

Drawing use

SLD / Schematic

Application

Power distribution

Reference family

IEC / Manufacturer

A distinction that matters

The Y-Y label does not by itself establish neutral availability.

Full referenceAdd to legend

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.