{"schemaVersion":1,"slug":"53-exciter-or-dc-generator-relay","name":"Exciter or DC generator relay","kind":"function","abbreviation":"53","aliases":["exciter relay","DC generator relay","ANSI 53","IEEE device 53"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Supervises an exciter or DC generator condition in a machine control arrangement.","description":["Supervises an exciter or DC generator condition in a machine control arrangement.","In a drafting package, connect this reference to the exciter or DC generator measurement connections. The associated drawing should trace the excitation-control sequence and protection outputs; 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 exciter or DC generator measurement connections.","Trace the excitation-control sequence and protection outputs."],"drawingChecklist":["Label the exciter or DC generator measurement connections.","Cross-reference the excitation-control sequence and protection outputs.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"This specialist reference does not itself identify which voltage, current or build-up condition the selected relay checks.","facts":[{"label":"ANSI / IEEE function number","value":"53"},{"label":"Drawing context","value":"The exciter or DC generator measurement connections"},{"label":"Application scope","value":"Specialist or legacy machine-control use; interpret with the equipment legend."}],"references":[{"sourceId":"pub-function-sel-numbers","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","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/53-exciter-or-dc-generator-relay","illustration":{"url":"https://eloragrid.ai/library/illustrations/53-exciter-or-dc-generator-relay.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-sel-numbers","title":"ANSI device-number and suffix reference table","publisher":"Schweitzer Engineering Laboratories","url":"https://selinc.com/pt/products/tables/ansi/","type":"manufacturer","scope":"Public Portuguese-language base-number and application-suffix table. Used to cross-check public number associations. Application-specific and historical labels need the selected drawing legend; this table is not a substitute for the licensed IEEE standard.","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."}]}