{"schemaVersion":1,"slug":"ansi-current-transformer","name":"ANSI/IEEE current transformer symbol","kind":"symbol","abbreviation":"CT","aliases":["IEEE current transformer symbol","ANSI current transformer symbol","HXF1CT"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-oriented graphical reference for current transformer, with public vendor evidence and drawing-reading notes.","description":["The current-transformer form identifies where a primary current is transformed into a measurement circuit. Its primary path and secondary leads are different circuits; CT ratio, polarity and metering or protection duty must be read from the annotation and equipment data.","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."],"readingNotes":["Follow the primary conductor first, then the two secondary terminals.","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."],"drawingChecklist":["State ratio and duty","Show secondary polarity","Cross-reference test terminals"],"distinction":"CT and VT forms both describe instrument transformers but connect to the power system in different ways.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview — Current Transformers"},{"label":"Public vendor block name","value":"HXF1CT (Autodesk identifier; not an IEEE symbol number)"},{"label":"Standards context","value":"IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved."},{"label":"Artwork scope","value":"Original functional illustration; exact standard glyph and compliance are not certified"}],"references":[{"sourceId":"ansi-autodesk-91c805d8-3b78-48a4-9ef0-39c462e3a164","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"sourceId":"ieee-315","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}],"related":["current-transformer","voltage-transformer","ct-test-terminal","50-instantaneous-overcurrent"],"artwork":"edu-ansi-current-transformer","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Autodesk IEEE-oriented Current Transformers functional form","counterpart":"current-transformer","reference":"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."},"url":"https://eloragrid.ai/symbols/ansi-current-transformer","illustration":{"url":"https://eloragrid.ai/library/illustrations/ansi-current-transformer.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"ansi-autodesk-91c805d8-3b78-48a4-9ef0-39c462e3a164","title":"Autodesk IEEE Symbol Preview — Current Transformers","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-91C805D8-3B78-48A4-9EF0-39C462E3A164.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Exact public IEEE-oriented category page verifying the component name and vendor block identifier."},{"id":"ieee-315","title":"IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams","publisher":"IEEE Standards Association","url":"https://standards.ieee.org/ieee/315/515/","type":"standard","scope":"Graphic symbols and designation letters. IEEE lists this edition as Inactive-Reserved; it is a historical reference, not a claim of current compliance.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Graphic-symbol standards context and official status; not a source of reproduced artwork."}]}