VT / PT
Voltage transformer
A transformer providing a voltage signal for metering or protection.
SLD / Schematic
IEEE / ANSI · VT / PT
ANSI/IEEE voltage transformer symbol
IEEE-oriented graphical reference for voltage transformer, with public vendor evidence and drawing-reading notes.
IEEE / ANSI · 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.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
SLD / Schematic · VT / PT
What it represents
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.
This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic.
How to read it
- Trace both primary voltage connections and the secondary input circuit.
- Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code.
Information to show or reference
- State VT ratio
- Identify primary/secondary terminals
- Show protection and earthing references
A distinction that matters
Potential transformer is a common name for a VT; a shared word does not make it a CT.
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 — Transformers
Exact public IEEE-oriented category page verifying the component name and vendor block identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
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.
Explore related references
CT
Current transformer
A current-measurement transformer used with metering and protection equipment.
SLD / Schematic
TX
Power transformer
Equipment transferring electrical power between winding circuits.
SLD / Schematic
27
Undervoltage
A function responding to voltage below its configured operating criteria.
Protection functions
Put the reference into a drawing workflow.
Elora Grid helps electrical teams work with drawings, specifications and equipment information. Explore the drafting workflow or join the early-access waitlist.