{"schemaVersion":1,"slug":"microgrid-protection-group-confirmation-gate","name":"Microgrid protection-group confirmation gate","kind":"symbol","abbreviation":"MPCG","aliases":["Microgrid topology and earthing coordination","microgrids Microgrid topology and earthing coordination","microgrids","Microgrids","Requested and reported groups","Protection-group readiness"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Confirms that assigned relays report the required operating group before dependent control proceeds.","description":["Confirms that assigned relays report the required operating group before dependent control proceeds. Microgrid topology control tracks which sources and load sections are electrically connected. The same physical installation can form several islands, so source roles, measurement boundaries and earthing interfaces must follow the established configuration.","In a microgrid with sectionalized buses, the controller can associate each connected source and load group with its current island. A mode-dependent neutral or protection interface needs its own independently validated design. For this reference, the drawing identifies “Requested and reported groups” at the input and “Protection-group readiness” at the output. Relay coverage and transition behavior must be specified.","Keep measured switch positions, logical island assignment and any earthing command separate. A conceptual topology block cannot establish a safe neutral-switching arrangement or prove that a circuit is de-energized. 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: Requested and reported groups. Identify its source device or document and the state represented on the drawing.","Follow the named output: Protection-group readiness. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Relay coverage and transition behavior must be specified.","Keep measured switch positions, logical island assignment and any earthing command separate. A conceptual topology block cannot establish a safe neutral-switching arrangement or prove that a circuit is de-energized."],"drawingChecklist":["Label the source and connection reference for requested and reported groups.","Identify the destination and defined state of protection-group readiness.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Relay coverage and transition behavior must be specified."],"distinction":"Relay coverage and transition behavior must be specified. 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":"Requested and reported groups"},{"label":"Output / connection","value":"Protection-group readiness"},{"label":"Lookup label","value":"MPCG is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-mg-modes","relevance":"Public technical context for microgrid topology and earthing coordination. Grid-connected and island modes, transitions, topology and authority. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["microgrid-interconnection-switch","neutral-earthing-resistor","microgrid-alternate-pcc-topology-selector"],"artwork":"pi26-microgrid-protection-group-confirmation-gate","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-topology","input":"Requested and reported groups","output":"Protection-group readiness"},"plainEnglish":{"title":"What this block does","introduction":"Confirms that assigned relays report the required operating group before dependent control proceeds.","example":"In a microgrid with sectionalized buses, the controller can associate each connected source and load group with its current island. A mode-dependent neutral or protection interface needs its own independently validated design. For this reference, the drawing identifies “Requested and reported groups” at the input and “Protection-group readiness” at the output. Relay coverage and transition behavior must be specified.","drawings":"Start at the named input: Requested and reported groups. Identify its source device or document and the state represented on the drawing. Follow the named output: Protection-group readiness. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Requested and reported groups"},{"name":"Output","meaning":"Protection-group readiness"},{"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":["Requested and reported groups","MPCG","Protection-group readiness"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Microgrid operating modes and transitions management","url":"https://productinfo.se.com/emol_functional_specifications/doca0371_emol_functionalspecifications/EN/DOCA0371_EMOL_Functional_Specifications_DD00894746.xml/%24/EMOL_OperatingModesandTransitionsManagement_DD00895904"}],"profileId":"power-installation-microgrid-topology"},"url":"https://eloragrid.ai/symbols/microgrid-protection-group-confirmation-gate","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-protection-group-confirmation-gate.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-modes","publisher":"Schneider Electric","title":"Microgrid operating modes and transitions management","url":"https://productinfo.se.com/emol_functional_specifications/doca0371_emol_functionalspecifications/EN/DOCA0371_EMOL_Functional_Specifications_DD00894746.xml/%24/EMOL_OperatingModesandTransitionsManagement_DD00895904","scope":"Grid-connected and island modes, transitions, topology and authority.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for microgrid topology and earthing coordination. Grid-connected and island modes, transitions, topology and authority. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}