{"schemaVersion":1,"slug":"microgrid-multiple-pcc-synchronising-selection","name":"Microgrid multiple-PCC synchronising selection","kind":"symbol","abbreviation":"MMSS","aliases":["Microgrid synchronising interfaces","microgrids Microgrid synchronising interfaces","microgrids","Microgrids","PCC selection and topology","Selected synchronising interface"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Selects the named interconnection point and voltage references for the assigned synchronising transaction.","description":["Selects the named interconnection point and voltage references for the assigned synchronising transaction. 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 “PCC selection and topology” at the input and “Selected synchronising interface” at the output. The other interconnection paths must be considered.","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: PCC selection and topology. Identify its source device or document and the state represented on the drawing.","Follow the named output: Selected synchronising interface. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The other interconnection paths must be considered.","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 pcc selection and topology.","Identify the destination and defined state of selected synchronising interface.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The other interconnection paths must be considered."],"distinction":"The other interconnection paths must be considered. 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":"PCC selection and topology"},{"label":"Output / connection","value":"Selected synchronising interface"},{"label":"Lookup label","value":"MMSS 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-synchronising-source-ownership-interface"],"artwork":"pi26-microgrid-multiple-pcc-synchronising-selection","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-sync","input":"PCC selection and topology","output":"Selected synchronising interface"},"plainEnglish":{"title":"What this block does","introduction":"Selects the named interconnection point and voltage references for the assigned synchronising transaction.","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 “PCC selection and circuit arrangement” at the input and “Selected synchronising interface” at the output. The other interconnection paths must be considered.","drawings":"Start at the named input: PCC selection and circuit arrangement. Identify its source device or document and the state represented on the drawing. Follow the named output: Selected synchronising interface. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"PCC selection and topology"},{"name":"Output","meaning":"Selected synchronising interface"},{"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":["PCC selection and topology","MMSS","Selected synchronising interface"],"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-multiple-pcc-synchronising-selection","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-multiple-pcc-synchronising-selection.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."}]}