{"schemaVersion":1,"slug":"microgrid-synchronising-cancellation-interface","name":"Microgrid synchronising cancellation interface","kind":"symbol","abbreviation":"MSCI","aliases":["Microgrid synchronising interfaces","microgrids Microgrid synchronising interfaces","microgrids","Microgrids","Cancel request or lost prerequisite","Synchronization cancellation"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Withdraws the defined synchronising request when its authorized cancellation condition occurs.","description":["Withdraws the defined synchronising request when its authorized cancellation condition occurs. 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 “Cancel request or lost prerequisite” at the input and “Synchronization cancellation” at the output. Completed breaker movement cannot be cancelled retrospectively.","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: Cancel request or lost prerequisite. Identify its source device or document and the state represented on the drawing.","Follow the named output: Synchronization cancellation. Cross-reference its destination and separate the command from confirmation that the equipment responded.","Completed breaker movement cannot be cancelled retrospectively.","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 cancel request or lost prerequisite.","Identify the destination and defined state of synchronization cancellation.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: Completed breaker movement cannot be cancelled retrospectively."],"distinction":"Completed breaker movement cannot be cancelled retrospectively. 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":"Cancel request or lost prerequisite"},{"label":"Output / connection","value":"Synchronization cancellation"},{"label":"Lookup label","value":"MSCI 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-pcc-live-side-voltage-selector"],"artwork":"pi26-microgrid-synchronising-cancellation-interface","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-sync","input":"Cancel request or lost prerequisite","output":"Synchronization cancellation"},"plainEnglish":{"title":"What this block does","introduction":"Withdraws the defined synchronising request when its authorized cancellation condition occurs.","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 “Cancel request or lost prerequisite” at the input and “Synchronization cancellation” at the output. Completed breaker movement cannot be cancelled retrospectively.","drawings":"Start at the named input: Cancel request or lost prerequisite. Identify its source device or document and the state represented on the drawing. Follow the named output: Synchronization cancellation. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Cancel request or lost prerequisite"},{"name":"Output","meaning":"Synchronization cancellation"},{"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":["Cancel request or lost prerequisite","MSCI","Synchronization cancellation"],"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-cancellation-interface","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-synchronising-cancellation-interface.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."}]}