Side-by-side reference

Understand the difference.

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

First referenceCompare with

TX ADJ

Symbols

Adjustable-ratio transformer

An adjustable-ratio transformer includes a documented means of varying its voltage ratio. The functional drawing should identify the adjustment or tap connection without assuming on-load operation.

Drawing use: SLD / Schematic
Application: Power distribution
Reference family: IEC / Manufacturer

A distinction that matters

Adjustable ratio does not automatically imply an on-load tap changer.

Full reference

Symbols

Power transformer

A power-transformer representation identifies equipment transferring electrical power between winding circuits. The generic mark can show the relationship between windings, but voltage levels, winding connections, vector group, rating and earthing information require additional annotations and equipment references.

Drawing use: SLD / Schematic
Application: Power distribution
Reference family: IEC / IEEE / ANSI

A distinction that matters

A transformer used for voltage measurement is a VT or PT. Its function and secondary circuit differ from those of a power transformer.

Full reference

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