{"schemaVersion":1,"slug":"92-voltage-and-power-directional-relay","name":"Voltage and power directional relay","kind":"function","abbreviation":"92","aliases":["directional voltage and power","ANSI 92","IEEE device 92"],"category":"measurement-protection","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEEE / ANSI"],"summary":"Combines voltage and power directional criteria in the specified control or protection arrangement.","description":["Combines voltage and power directional criteria in the specified control or protection arrangement.","In a drafting package, connect this reference to the voltage and current measurement references. The associated drawing should trace the permitted or blocked operating action; 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 voltage and current measurement references.","Trace the permitted or blocked operating action."],"drawingChecklist":["Label the voltage and current measurement references.","Cross-reference the permitted or blocked operating action.","Identify the device tag, manual revision and logic drawing that define this implementation."],"distinction":"This specialist combined reference requires a scheme description; it should not replace separate modern function labels without justification.","facts":[{"label":"ANSI / IEEE function number","value":"92"},{"label":"Drawing context","value":"The voltage and current measurement references"},{"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":["32-directional-power","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/92-voltage-and-power-directional-relay","illustration":{"url":"https://eloragrid.ai/library/illustrations/92-voltage-and-power-directional-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."}]}