{"schemaVersion":1,"slug":"microgrid-shedding-group-selection-matrix","name":"Microgrid shedding-group selection matrix","kind":"symbol","abbreviation":"MSSM","aliases":["Microgrid load shedding and restoration","microgrids Microgrid load shedding and restoration","microgrids","Microgrids","Reduction request and group availability","Selected shedding groups"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Selects a feasible set of assigned controllable groups for the requested load reduction.","description":["Selects a feasible set of assigned controllable groups for the requested load reduction. Load management balances the available electrical supply against the loads that remain connected. Shedding, restoration, priority and proof of disconnection are separate control functions and should remain traceable to individual load groups.","In a microgrid island, the controller can disconnect lower-priority loads when a source is lost and later request restoration when the documented reserve and stability conditions permit it. For this reference, the drawing identifies “Reduction request and group availability” at the input and “Selected shedding groups” at the output. Group power estimates can change during operation.","Identify each load group, priority, measured contribution and feedback. Shedding amounts, operating times and restoration conditions require the approved power-management design and the actual connected-load data. 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: Reduction request and group availability. Identify its source device or document and the state represented on the drawing.","Follow the named output: Selected shedding groups. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Group power estimates can change during operation.","Identify each load group, priority, measured contribution and feedback. Shedding amounts, operating times and restoration conditions require the approved power-management design and the actual connected-load data."],"drawingChecklist":["Label the source and connection reference for reduction request and group availability.","Identify the destination and defined state of selected shedding groups.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Group power estimates can change during operation."],"distinction":"Group power estimates can change during operation. 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":"Reduction request and group availability"},{"label":"Output / connection","value":"Selected shedding groups"},{"label":"Lookup label","value":"MSSM is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-mg-study","relevance":"Public technical context for microgrid load shedding and restoration. Storage, protection, black start, load restoration and coordinated island operation. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["microgrid-controller","generic-electrical-load","microgrid-load-disconnection-confirmation"],"artwork":"pi26-microgrid-shedding-group-selection-matrix","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-loads","input":"Reduction request and group availability","output":"Selected shedding groups"},"plainEnglish":{"title":"What this block does","introduction":"Selects a feasible set of assigned controllable groups for the requested load reduction.","example":"In a microgrid island, the controller can disconnect lower-priority loads when a source is lost and later request restoration when the documented reserve and stability conditions permit it. For this reference, the drawing identifies “Reduction request and group availability” at the input and “Selected shedding groups” at the output. Group power estimates can change during operation.","drawings":"Start at the named input: Reduction request and group availability. Identify its source device or document and the state represented on the drawing. Follow the named output: Selected shedding groups. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Reduction request and group availability"},{"name":"Output","meaning":"Selected shedding groups"},{"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":["Reduction request and group availability","MSSM","Selected shedding groups"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Avista Shared Energy Economy microgrid protection and control case study","url":"https://selinc.com/api/download/135486/"}],"profileId":"power-installation-microgrid-loads"},"url":"https://eloragrid.ai/symbols/microgrid-shedding-group-selection-matrix","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-shedding-group-selection-matrix.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-study","publisher":"SEL","title":"Avista Shared Energy Economy microgrid protection and control case study","url":"https://selinc.com/api/download/135486/","scope":"Storage, protection, black start, load restoration and coordinated island operation.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for microgrid load shedding and restoration. Storage, protection, black start, load restoration and coordinated island operation. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}