Understand the difference.

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

VT / PT

IEEE / ANSI

ANSI/IEEE voltage transformer symbol

The potential-transformer form identifies a voltage measurement interface in the IEEE-oriented vendor library. Power connection, winding polarity and secondary protection are read as instrument-transformer information rather than as a general power-supply transformer.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Autodesk IEEE-oriented Transformers functional form. Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.

A distinction that matters

Potential transformer is a common name for a VT; a shared word does not make it a CT.

Full referenceAdd to legend

VT / PT

Symbols

Voltage transformer

A voltage transformer provides a secondary voltage related to the voltage on its primary winding. VT and PT, for potential transformer, are common terms encountered in power drawings. Its representation identifies a measurement function; winding connections, fuses, earthing and secondary circuits need their own documented detail.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEC / IEEE / ANSI

A distinction that matters

A VT supplies a voltage measurement; a power transformer supplies a power circuit. A shared transformer-like outline does not make their functions interchangeable.

Full referenceAdd to legend

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