{"schemaVersion":1,"slug":"microgrid-tie-breaker-island-merge-request","name":"Microgrid tie-breaker island-merge request","kind":"symbol","abbreviation":"MTIR","aliases":["Microgrid topology and earthing coordination","microgrids Microgrid topology and earthing coordination","microgrids","Microgrids","Island states and synchronism","Tie connection request"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Requests the assigned connection between independently operating sections when required conditions permit it.","description":["Requests the assigned connection between independently operating sections when required conditions permit it. 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 “Island states and synchronism” at the input and “Tie connection request” at the output. Two live islands require the appropriate synchronization design.","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: Island states and synchronism. Identify its source device or document and the state represented on the drawing.","Follow the named output: Tie connection request. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Two live islands require the appropriate synchronization design.","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 island states and synchronism.","Identify the destination and defined state of tie connection request.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Two live islands require the appropriate synchronization design."],"distinction":"Two live islands require the appropriate synchronization design. 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":"Island states and synchronism"},{"label":"Output / connection","value":"Tie connection request"},{"label":"Lookup label","value":"MTIR 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-tie-open-island-split-indication"],"artwork":"pi26-microgrid-tie-breaker-island-merge-request","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-topology","input":"Island states and synchronism","output":"Tie connection request"},"plainEnglish":{"title":"What this block does","introduction":"Requests the assigned connection between independently operating sections when required conditions permit it.","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 “Island states and synchronism” at the input and “Tie connection request” at the output. Two live islands require the appropriate synchronization design.","drawings":"Start at the named input: Island states and synchronism. Identify its source device or document and the state represented on the drawing. Follow the named output: Tie connection request. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Island states and synchronism"},{"name":"Output","meaning":"Tie connection request"},{"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":["Island states and synchronism","MTIR","Tie connection request"],"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-tie-breaker-island-merge-request","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-tie-breaker-island-merge-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-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."}]}