{"schemaVersion":1,"slug":"recording-ammeter","name":"Recording ammeter","kind":"symbol","abbreviation":"A","aliases":["current recorder","recording current instrument"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC"],"summary":"Recording instrument that keeps a time record of current, drawn as a square marked A.","description":["A recording ammeter logs current against time and is used to study load profiles, motor starting and feeder loading. It is connected in a CT secondary circuit, so like any CT-fed instrument its input forms part of a loop that must never be opened under load.","The record is only as useful as its interval and range. The symbol does not show whether peaks are captured or averaged, and a recorder sized for normal load may clip during starting or fault current."],"readingNotes":["Treat the input as part of the CT secondary loop.","Check whether peaks or averages are recorded."],"drawingChecklist":["Show CT ratio","State range and interval","Provide CT shorting point"],"distinction":"A recording ammeter logs current over time; a maximum-demand indicator keeps only the highest averaged value.","facts":[{"label":"Recorded quantity","value":"Current"},{"label":"Input","value":"Usually a CT secondary"},{"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","ammeter","maximum-demand-indicator"],"artwork":"s28-recording-ammeter","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Recording ammeter mean?","introduction":"A recording ammeter logs current against time and is used to study load profiles, motor starting and feeder loading. It is connected in a CT secondary circuit, so like any CT-fed instrument its input forms part of a loop that must never be opened under load.","example":"The record is only as useful as its interval and range. The symbol does not show whether peaks are captured or averaged, and a recorder sized for normal load may clip during starting or fault current.","drawings":"Treat the input as part of the CT secondary loop. Check whether peaks or averages are recorded. A recording ammeter logs current over time; a maximum-demand indicator keeps only the highest averaged value.","terms":[{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."},{"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 current, drawn as a square marked A. A recording ammeter logs current over time; a maximum-demand indicator keeps only the highest averaged value.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/recording-ammeter","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/recording-ammeter.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."}]}