{"schemaVersion":1,"slug":"microgrid-resource-runback-request","name":"Microgrid resource runback request","kind":"symbol","abbreviation":"MRRR","aliases":["Microgrid active-power dispatch controls","microgrids Microgrid active-power dispatch controls","microgrids","Microgrids","Runback initiation","Reduced resource target"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Requests the documented reduction of an assigned resource output following its initiating condition.","description":["Requests the documented reduction of an assigned resource output following its initiating condition. Active-power dispatch allocates the electrical work performed by the microgrid resources. A total site target, a resource power limit and the actual measured contribution are different quantities that must be connected clearly in the diagram.","In a microgrid with solar generation, a battery and generators, the controller can allocate an import/export target among the available resources while reserving the power needed for operating disturbances. For this reference, the drawing identifies “Runback initiation” at the input and “Reduced resource target” at the output. Runback differs from immediate resource disconnection.","Identify the measurement boundary, power sign convention, resource limits and target priority. An original control block does not supply dispatch settings, a financial operating policy or proof of grid-code compliance. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation."],"readingNotes":["Start at the named input: Runback initiation. Identify its source device or document and the state represented on the drawing.","Follow the named output: Reduced resource target. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Runback differs from immediate resource disconnection.","Identify the measurement boundary, power sign convention, resource limits and target priority. An original control block does not supply dispatch settings, a financial operating policy or proof of grid-code compliance."],"drawingChecklist":["Label the source and connection reference for runback initiation.","Identify the destination and defined state of reduced resource target.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Runback differs from immediate resource disconnection."],"distinction":"Runback differs from immediate resource disconnection. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.","facts":[{"label":"Representation","value":"Functional block"},{"label":"Installation focus","value":"Microgrids"},{"label":"Input / boundary","value":"Runback initiation"},{"label":"Output / connection","value":"Reduced resource target"},{"label":"Lookup label","value":"MRRR is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-mg-power","relevance":"Public technical context for microgrid active-power dispatch controls. Active and reactive power, generation, load control, operating reserves and system supervision. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["power-plant-controller","point-of-common-coupling","microgrid-active-power-control-ownership-selector"],"artwork":"pi26-microgrid-resource-runback-request","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-active","input":"Runback initiation","output":"Reduced resource target"},"plainEnglish":{"title":"What this block does","introduction":"Requests the documented reduction of an assigned resource output following its initiating condition.","example":"In a microgrid with solar generation, a battery and generators, the controller can allocate an import/export target among the available resources while reserving the power needed for operating disturbances. For this reference, the drawing identifies “Runback initiation” at the input and “Reduced resource target” at the output. Runback differs from immediate resource disconnection.","drawings":"Start at the named input: Runback initiation. Identify its source device or document and the state represented on the drawing. Follow the named output: Reduced resource target. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Runback initiation"},{"name":"Output","meaning":"Reduced resource target"},{"name":"Application reference","meaning":"An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections."}],"diagram":"flow","steps":["Runback initiation","MRRR","Reduced resource target"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Microgrid control systems","url":"https://selinc.com/services/microgrids-power-management/microgrid-control-systems/"}],"profileId":"power-installation-microgrid-active"},"url":"https://eloragrid.ai/symbols/microgrid-resource-runback-request","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-resource-runback-request.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-mg-power","publisher":"SEL","title":"Microgrid control systems","url":"https://selinc.com/services/microgrids-power-management/microgrid-control-systems/","scope":"Active and reactive power, generation, load control, operating reserves and system supervision.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for microgrid active-power dispatch controls. Active and reactive power, generation, load control, operating reserves and system supervision. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}