{"schemaVersion":1,"slug":"iec-phase-to-neutral-voltmeter-selector","name":"Phase-to-neutral voltmeter selector","kind":"symbol","abbreviation":"HSW1S91","aliases":["Phase-to-neutral voltmeter selector symbol","HSW1S91","Phase-to-neutral voltmeter selector IEC reference"],"category":"measurement-protection","drawingTypes":["Schematic"],"referenceFamilies":["IEC","Manufacturer"],"summary":"This representation identifies selection among phase-to-neutral voltage measurement connections.","description":["This representation identifies selection among phase-to-neutral voltage measurement connections. The meter is connected to the selected phase relative to the documented neutral or reference point. That connection differs from measuring between two phase conductors.","Show the reference terminal and each selectable measurement path. The position table should make clear which reading the operator receives at each position."],"readingNotes":["Show the neutral/reference connection and each selected phase in the position table.","Phase-to-neutral and phase-to-phase measurements have different connection paths."],"drawingChecklist":["Identify the associated device, circuit or diagram boundary.","Show the neutral/reference connection and each selected phase in the position table.","Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form."],"distinction":"Phase-to-neutral and phase-to-phase measurements have different connection paths.","facts":[{"label":"Reference scope","value":"Specific public IEC-context family form"},{"label":"Publisher reference token","value":"HSW1S91 (Autodesk token; not a verified IEC database ID)"},{"label":"Information added","value":"Show the neutral/reference connection and each selected phase in the position table."},{"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-neutral-voltmeter-selector","publishedOn":"2026-10-14","updatedOn":"2026-10-14","provenance":"independent-public-research","symbolVariant":{"convention":"IEC","form":"Phase-to-neutral 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-neutral-voltmeter-selector","illustration":{"url":"https://eloragrid.ai/library/illustrations/iec-phase-to-neutral-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."}]}