# ANSI/IEEE current transformer with conductor indication symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-current-transformer-with-primary-conductor-indication
Publisher: Elora Grid
Updated: 2026-10-28
Lookup label: CT
Drawing use: SLD, Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented Current Transformers form: With Conductor Indication
Autodesk publishes this block under its IEEE Symbol Preview. The counterpart is the matching functional concept in the library; no equivalence of every detailed standard graphic is asserted.
Related representation: [Current transformer with primary conductor indication](https://eloragrid.ai/symbols/current-transformer-with-primary-conductor-indication)

IEEE-library CT form that shows the primary conductor passing through the core, as with window and bar-type CTs.

## In plain English

### What does ANSI/IEEE current transformer with conductor indication mean?

This CT form draws the primary conductor explicitly passing through the transformer core. It suits window, bar and bushing CTs where the primary is the main circuit conductor itself, and it helps the reader see which conductor, and how many passes, the CT encloses.

### A simple example

The conductor indication does not give ratio, accuracy class or burden. If the primary passes the window more than once, the effective ratio changes, so turns through the window must be noted beside the symbol.

### What the drawings help you do

Count primary passes through the window. Check polarity marks against the primary current direction. The conductor-indication form shows the enclosed primary; the plain CT form represents the CT without showing how the primary is arranged.

### This particular reference

IEEE-library CT form that shows the primary conductor passing through the core, as with window and bar-type CTs. The conductor-indication form shows the enclosed primary; the plain CT form represents the CT without showing how the primary is arranged.

### Terms

- Winding: A coil of conductor inside an electrical machine or transformer.
- Rating: A value stating the conditions for which equipment is specified.
- Schematic: A drawing showing function and connections rather than physical appearance.

Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference
A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.

- [Autodesk IEEE Symbol Preview — Current Transformers](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-91C805D8-3B78-48A4-9EF0-39C462E3A164.htm)
- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/)


## What it represents

This CT form draws the primary conductor explicitly passing through the transformer core. It suits window, bar and bushing CTs where the primary is the main circuit conductor itself, and it helps the reader see which conductor, and how many passes, the CT encloses.
The conductor indication does not give ratio, accuracy class or burden. If the primary passes the window more than once, the effective ratio changes, so turns through the window must be noted beside the symbol.

## How to read it

- Count primary passes through the window.
- Check polarity marks against the primary current direction.

## Information to show or reference

- State ratio and class
- Show polarity marks
- Note primary passes

## Important distinction

The conductor-indication form shows the enclosed primary; the plain CT form represents the CT without showing how the primary is arranged.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview, Current Transformers
- Public vendor block name: HXF1T33 / VXF1T33 (Autodesk identifier; not an IEEE symbol number)
- Typical construction: Window, bar or bushing CT
- Artwork scope: Original functional illustration; exact standard glyph and compliance are not certified

## Public references

- [Autodesk IEEE Symbol Preview — Current Transformers](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-91C805D8-3B78-48A4-9EF0-39C462E3A164.htm) — Autodesk. Public IEEE-oriented Current Transformers preview listing the With Conductor Indication block.
- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/) — IEEE Standards Association. Graphic-symbol standards context and official status; not a source of reproduced artwork.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.