{"schemaVersion":1,"slug":"iec-phase-to-phase-voltmeter-selector","name":"Phase-to-phase voltmeter selector","kind":"symbol","abbreviation":"HSW1S90","aliases":["Phase-to-phase voltmeter selector symbol","HSW1S90","Phase-to-phase voltmeter selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies selection among phase-to-phase voltage measurement connections.","description":["This representation identifies selection among phase-to-phase voltage measurement connections. The selector connects the meter to the documented line-to-line measurement pairs at its operating positions. It is a measurement interface, not the power switching device of the three-phase circuit.","Provide the actual contact programme and measurement position labels. Identify any instrument-transformer secondary circuits that feed the selector."],"readingNotes":["Document the selector position table and the meter connection.","A measurement selector must not be mistaken for a three-phase power isolator."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Document the selector position table and the meter connection.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"A measurement selector must not be mistaken for a three-phase power isolator.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S90 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Document the selector position table and the meter connection."},{"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-phase-to-phase-voltmeter-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Phase-to-phase voltmeter 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-phase-to-phase-voltmeter-selector","illustration":{"url":"https://eloragrid.ai/library/illustrations/iec-phase-to-phase-voltmeter-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."}]}