{"schemaVersion":1,"slug":"54-turning-gear-engaging-device","name":"Turning-gear engaging device","kind":"function","abbreviation":"54","aliases":["turning gear","turning gear engagement","ANSI 54","IEEE device 54"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Controls engagement of the turning gear used to rotate a large machine at low speed.","description":["Controls engagement of the turning gear used to rotate a large machine at low speed.","In a drafting package, connect this reference to the turning-gear mechanism and speed/interlock signals. The associated drawing should trace the engagement actuator and proof-of-position circuit; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.","This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design."],"readingNotes":["Identify the turning-gear mechanism and speed/interlock signals.","Trace the engagement actuator and proof-of-position circuit."],"drawingChecklist":["Label the turning-gear mechanism and speed/interlock signals.","Cross-reference the engagement actuator and proof-of-position circuit.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"Turning-gear engagement is a specialist machine mechanism, not a bus or generator paralleling breaker.","facts":[{"label":"ANSI / IEEE function number","value":"54"},{"label":"Drawing context","value":"The turning-gear mechanism and speed/interlock signals"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-abb-secogear","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"sourceId":"ieee-functions","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}],"related":["generator-package","52-ac-circuit-breaker"],"artwork":"pub-function-box","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/protection-functions/54-turning-gear-engaging-device","illustration":{"url":"https://eloragrid.ai/library/illustrations/54-turning-gear-engaging-device.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pub-function-abb-secogear","title":"SecoGear medium-voltage switchgear application and technical guide, DET-882","publisher":"ABB","url":"https://library.e.abb.com/public/a06cf4cf38b34800b27bb337ab12f74f/DET-882%20SecoGear%205kV-15kV%20IEEE%20Metal%20Clad%20Switchgear_Application%20and%20installation%20guide.pdf","type":"manufacturer","scope":"Public switchgear application guide with a device-number reference table. Used to cross-check 54, 61, 62 and specialist labels. Text, photographs and manufacturer diagrams are linked only and are not redistributed.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public manufacturer number/name association. Drafting explanations are independently written."},{"id":"ieee-functions","title":"IEEE C37.2-2022: power-system device function numbers","publisher":"IEEE","url":"https://ieeexplore.ieee.org/document/9984140","type":"standard","scope":"Device function numbers, acronyms and contact designations. The full publication may require access through IEEE.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Normative device-number publication; exact edition wording and compliance require the licensed standard."}]}