{"schemaVersion":1,"slug":"microgrid-intertie-opening-request-boundary","name":"Microgrid intertie opening-request boundary","kind":"symbol","abbreviation":"MIOB","aliases":["Microgrid topology and earthing coordination","microgrids Microgrid topology and earthing coordination","microgrids","Microgrids","Separation request and authority","Intertie opening command"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Identifies the authorized opening request to the assigned interconnection device.","description":["Identifies the authorized opening request to the assigned interconnection device. 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 “Separation request and authority” at the input and “Intertie opening command” at the output. Opening feedback is a separate signal.","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: Separation request and authority. Identify its source device or document and the state represented on the drawing.","Follow the named output: Intertie opening command. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Opening feedback is a separate signal.","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 separation request and authority.","Identify the destination and defined state of intertie opening command.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Opening feedback is a separate signal."],"distinction":"Opening feedback is a separate signal. 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":"Separation request and authority"},{"label":"Output / connection","value":"Intertie opening command"},{"label":"Lookup label","value":"MIOB 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-intertie-open-proof-confirmation"],"artwork":"pi26-microgrid-intertie-opening-request-boundary","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-topology","input":"Separation request and authority","output":"Intertie opening command"},"plainEnglish":{"title":"What this block does","introduction":"Identifies the authorized opening request to the assigned interconnection device.","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 “Separation request and authority” at the input and “Intertie opening command” at the output. Opening feedback is a separate signal.","drawings":"Start at the named input: Separation request and authority. Identify its source device or document and the state represented on the drawing. Follow the named output: Intertie opening command. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Separation request and authority"},{"name":"Output","meaning":"Intertie opening command"},{"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":["Separation request and authority","MIOB","Intertie opening command"],"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-intertie-opening-request-boundary","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-intertie-opening-request-boundary.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."}]}