{"schemaVersion":1,"slug":"iec-three-point-current-measurement-selector","name":"Three-point current measurement selector","kind":"symbol","abbreviation":"HSW1S94","aliases":["Three-point current measurement selector symbol","HSW1S94","Three-point current measurement selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies selection among three current-measurement points.","description":["This representation identifies selection among three current-measurement points. The meter is connected to one of three documented current-measurement circuits. When CT secondaries are involved, the selected switch arrangement must be considered with their continuity and test provisions.","Document the exact terminal and switching scheme from the selected equipment. The concept is an interpretation reference rather than a field switching or testing procedure."],"readingNotes":["Coordinate CT secondary handling and the selected meter-switch connection scheme.","A current selector cannot be treated as an ordinary voltage selector because CT circuits require documented continuity arrangements."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Coordinate CT secondary handling and the selected meter-switch connection scheme.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A current selector cannot be treated as an ordinary voltage selector because CT circuits require documented continuity arrangements.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S94 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Coordinate CT secondary handling and the selected meter-switch connection scheme."},{"label":"Preview","value":"Independent educational concept; consult the publisher and applicable standard for the exact graphic"}],"references":[{"sourceId":"pub-symbol-misc-switches","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}],"related":["current-transformer","voltage-transformer"],"artwork":"edu-iec-three-point-current-measurement-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Three-point current measurement selector","reference":"Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier."},"url":"https://eloragrid.ai/symbols/iec-three-point-current-measurement-selector","illustration":{"url":"https://eloragrid.ai/library/illustrations/iec-three-point-current-measurement-selector.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-symbol-misc-switches","title":"AutoCAD Electrical: Level, flow, keyed and measurement switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1FB94435-C954-4479-BD97-25796DB8F728.htm","type":"cad-reference","scope":"Public vendor catalogue naming and functional variants. Vendor block names are not IEC identifiers. Linked for reference; no graphics or CAD files are redistributed.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content."}]}