{"schemaVersion":1,"slug":"ansi-latched-key-operated-switch","name":"ANSI/IEEE Latched key-operated switch form","kind":"symbol","abbreviation":"KEY HOLD","aliases":["HPB11KSL","VPB11KSL","IEEE Key Switch Latched, Normally Open","ANSI Latched key-operated switch"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["IEEE / ANSI","Manufacturer"],"summary":"IEEE-library form of latched key-operated switch: a latched key-operated switch retains its commanded position according to the selected mechanism.","description":["This reference locates latched key-operated switch in Autodesk's IEEE-oriented miscellaneous switches family. A latched key-operated switch retains its commanded position according to the selected mechanism. The drawing should specify how the latched position is released and where the key is removable. The public library uses HPB11KSL for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.","Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.","Separate the mechanical retention from any electrical seal-in circuit. Mechanically latched operation is different from a relay holding circuit. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted."],"readingNotes":["Separate the mechanical retention from any electrical seal-in circuit.","The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation."],"drawingChecklist":["List stable positions","Show reset action","Document key-removal constraints"],"distinction":"Mechanically latched operation is different from a relay holding circuit.","facts":[{"label":"Convention evidence","value":"Autodesk IEEE Symbol Preview: Miscellaneous Switches; published form: Key Switch Latched, Normally Open."},{"label":"Public vendor block","value":"HPB11KSL. Vendor library token, not an IEEE symbol number."},{"label":"Drawing role","value":"Manual operation"},{"label":"Identifier status","value":"The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name."},{"label":"Artwork scope","value":"Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified."}],"references":[{"sourceId":"ansi-autodesk-278f6c21-b1a6-4ea1-a535-e78d53bbd10d","relevance":"Public IEEE-oriented Miscellaneous Switches table explicitly lists HPB11KSL as Key Switch Latched, Normally Open. This supports the vendor convention context, not reproduction of the publisher graphic."}],"related":["latched-key-operated-switch","pushbutton-no","pushbutton-nc"],"artwork":"s28-ansi-latched-key-operated-switch","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","symbolVariant":{"convention":"IEEE / ANSI","form":"Key Switch Latched, Normally Open","reference":"Autodesk IEEE Symbol Preview: Miscellaneous Switches, block HPB11KSL. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.","counterpart":"latched-key-operated-switch"},"plainEnglish":{"title":"What does ANSI/IEEE Latched key-operated switch form mean?","introduction":"This reference locates latched key-operated switch in Autodesk's IEEE-oriented miscellaneous switches family. A latched key-operated switch retains its commanded position according to the selected mechanism. The drawing should specify how the latched position is released and where the key is removable. The public library uses HPB11KSL for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.","example":"Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.","drawings":"Separate the mechanical retention from any electrical seal-in circuit. Mechanically latched operation is different from a relay holding circuit. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.","terms":[{"name":"Normally open / normally closed","meaning":"The contact state in the normal condition defined for the drawing."},{"name":"Coil","meaning":"A wound conductor that can produce a magnetic field when energised."},{"name":"Signal","meaning":"Electrical information passed between devices, rather than necessarily the main power supply."}],"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":"Autodesk IEEE Symbol Preview — Miscellaneous Switches","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-278F6C21-B1A6-4EA1-A535-E78D53BBD10D.htm"}],"detail":"IEEE-library form of latched key-operated switch: a latched key-operated switch retains its commanded position according to the selected mechanism. Mechanically latched operation is different from a relay holding circuit.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/ansi-latched-key-operated-switch","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ansi-latched-key-operated-switch.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"ansi-autodesk-278f6c21-b1a6-4ea1-a535-e78d53bbd10d","title":"Autodesk IEEE Symbol Preview — Miscellaneous Switches","publisher":"Autodesk","url":"https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-278F6C21-B1A6-4EA1-A535-E78D53BBD10D.htm","type":"cad-reference","scope":"Verified public IEEE-oriented vendor catalogue. Block names identify vendor symbols, not IEEE standard symbol numbers. Linked only; graphics and CAD files are not redistributed. IEEE/ANSI 315-1975 is a historical graphics reference with Inactive-Reserved status; this page does not certify current standards compliance.","checkedOn":"2026-10-14","reuse":"link-only","relevance":"Public IEEE-oriented Miscellaneous Switches table explicitly lists HPB11KSL as Key Switch Latched, Normally Open. This supports the vendor convention context, not reproduction of the publisher graphic."}]}