{"schemaVersion":1,"slug":"recording-voltmeter","name":"Recording voltmeter","kind":"symbol","abbreviation":"V","aliases":["voltage recorder","recording voltage instrument"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC"],"summary":"Recording instrument that keeps a time record of voltage, drawn as a square marked V.","description":["A recording voltmeter stores voltage against time so that sags, swells and slow variations can be reviewed later. On single-line diagrams it is drawn off a VT secondary at a busbar or supply point, and on schematics it is wired across the VT circuit like an indicating voltmeter.","The symbol does not say how fast the recorder samples. A slow recorder logging averages every few minutes cannot show short dips, so the recording interval must be checked against what the record will be used to investigate."],"readingNotes":["Identify the VT feeding the recorder.","Check the recording interval against the events of interest."],"drawingChecklist":["Show VT ratio","State recording interval","Reference data retrieval"],"distinction":"A recording voltmeter stores a time record; an ordinary voltmeter shows only the present voltage.","facts":[{"label":"Recorded quantity","value":"Voltage"},{"label":"Shape convention","value":"Square recording form"},{"label":"Preview","value":"Independent educational concept; consult the applicable standard and project legend for the exact graphic"}],"references":[{"sourceId":"iec-diagrams","relevance":"IEC context for graphical symbols used in diagrams; no IEC graphic is reproduced."}],"related":["recording-instrument-general-symbol","voltmeter","power-quality-analyser"],"artwork":"s28-recording-voltmeter","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Recording voltmeter mean?","introduction":"A recording voltmeter stores voltage against time so that sags, swells and slow variations can be reviewed later. On single-line diagrams it is drawn off a VT secondary at a busbar or supply point, and on schematics it is wired across the VT circuit like an indicating voltmeter.","example":"The symbol does not say how fast the recorder samples. A slow recorder logging averages every few minutes cannot show short dips, so the recording interval must be checked against what the record will be used to investigate.","drawings":"Identify the VT feeding the recorder. Check the recording interval against the events of interest. A recording voltmeter stores a time record; an ordinary voltmeter shows only the present voltage.","terms":[{"name":"Terminal","meaning":"An identified point where a conductor connects."},{"name":"Rating","meaning":"A value stating the conditions for which equipment is specified."},{"name":"Schematic","meaning":"A drawing showing function and connections rather than physical appearance."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"IEC graphical symbols for diagrams","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/"}],"detail":"Recording instrument that keeps a time record of voltage, drawn as a square marked V. A recording voltmeter stores a time record; an ordinary voltmeter shows only the present voltage.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/recording-voltmeter","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/recording-voltmeter.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"iec-diagrams","title":"IEC graphical symbols for diagrams","publisher":"IEC","url":"https://tc3.iec.ch/tc-activity/graphical-symbols-for-diagrams/","type":"standard","scope":"IEC 60617 and related symbol-design publications. Full database access requires a subscription.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"IEC context for graphical symbols used in diagrams; no IEC graphic is reproduced."}]}