{"schemaVersion":1,"slug":"microgrid-synchronising-measurement-quality-gate","name":"Microgrid synchronising measurement-quality gate","kind":"symbol","abbreviation":"MSMG","aliases":["Microgrid synchronising interfaces","microgrids Microgrid synchronising interfaces","microgrids","Microgrids","Voltage measurement quality","Synchronising inhibit"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Restrains the assigned closing path when a required synchronising input is invalid.","description":["Restrains the assigned closing path when a required synchronising input is invalid. Synchronising control compares two AC systems before their assigned connecting breaker closes. Voltage magnitude, frequency, phase relationship, breaker readiness and command authority are separate inputs to the closing decision.","In a microgrid reconnecting at its point of common coupling, a synchroniser can adjust the island reference while a separate permissive confirms the permitted relationship across the open breaker. For this reference, the drawing identifies “Voltage measurement quality” at the input and “Synchronising inhibit” at the output. Fallback behavior requires explicit design.","Identify the two measurement sides and the equipment receiving any adjustment request. Closing limits, breaker timing and loss-of-measurement behavior require the approved synchronising design. 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: Voltage measurement quality. Identify its source device or document and the state represented on the drawing.","Follow the named output: Synchronising inhibit. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Fallback behavior requires explicit design.","Identify the two measurement sides and the equipment receiving any adjustment request. Closing limits, breaker timing and loss-of-measurement behavior require the approved synchronising design."],"drawingChecklist":["Label the source and connection reference for voltage measurement quality.","Identify the destination and defined state of synchronising inhibit.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Fallback behavior requires explicit design."],"distinction":"Fallback behavior requires explicit 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":"Voltage measurement quality"},{"label":"Output / connection","value":"Synchronising inhibit"},{"label":"Lookup label","value":"MSMG is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-mg-design","relevance":"Public technical context for microgrid synchronising interfaces. Microgrid power and control interfaces, synchronisation and source coordination. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["25-synchronism-check","synchronoscope","microgrid-multiple-pcc-synchronising-selection"],"artwork":"pi26-microgrid-synchronising-measurement-quality-gate","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-sync","input":"Voltage measurement quality","output":"Synchronising inhibit"},"plainEnglish":{"title":"What this block does","introduction":"Restrains the assigned closing path when a required synchronising input is invalid.","example":"In a microgrid reconnecting at its point of common coupling, a synchroniser can adjust the island reference while a separate permissive confirms the permitted relationship across the open breaker. For this reference, the drawing identifies “Voltage measurement quality” at the input and “Synchronising inhibit” at the output. Fallback behavior requires explicit design.","drawings":"Start at the named input: Voltage measurement quality. Identify its source device or document and the state represented on the drawing. Follow the named output: Synchronising inhibit. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Voltage measurement quality"},{"name":"Output","meaning":"Synchronising inhibit"},{"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":["Voltage measurement quality","MSMG","Synchronising inhibit"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Microgrid Flex components and control design","url":"https://productinfo.se.com/microgrid_guide/0100db2503_ecostruxure-microgrid-flex_design-guide_iec/English/0100DB2503-Microgrid%20Flex%20Design%20Guide-IEC-Optimize%20%28bookmap%29_DD00654397.XML.xml/%24/MicrogridFlexComponents-3A7DD96C"}],"profileId":"power-installation-microgrid-sync"},"url":"https://eloragrid.ai/symbols/microgrid-synchronising-measurement-quality-gate","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-synchronising-measurement-quality-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-design","publisher":"Schneider Electric","title":"Microgrid Flex components and control design","url":"https://productinfo.se.com/microgrid_guide/0100db2503_ecostruxure-microgrid-flex_design-guide_iec/English/0100DB2503-Microgrid%20Flex%20Design%20Guide-IEC-Optimize%20%28bookmap%29_DD00654397.XML.xml/%24/MicrogridFlexComponents-3A7DD96C","scope":"Microgrid power and control interfaces, synchronisation and source coordination.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for microgrid synchronising interfaces. Microgrid power and control interfaces, synchronisation and source coordination. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}