{"schemaVersion":1,"slug":"microgrid-pcc-live-side-voltage-selector","name":"Microgrid PCC live-side voltage selector","kind":"symbol","abbreviation":"MPLVS","aliases":["Microgrid synchronising interfaces","microgrids Microgrid synchronising interfaces","microgrids","Microgrids","Utility-side voltage measurement","Live-side synchronising voltage"],"category":"microgrid-systems","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Identifies the utility-side voltage reference supplied to the PCC synchronising function.","description":["Identifies the utility-side voltage reference supplied to the PCC synchronising function. 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 “Utility-side voltage measurement” at the input and “Live-side synchronising voltage” at the output. The selected VT location must be stated.","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: Utility-side voltage measurement. Identify its source device or document and the state represented on the drawing.","Follow the named output: Live-side synchronising voltage. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The selected VT location must be stated.","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 utility-side voltage measurement.","Identify the destination and defined state of live-side synchronising voltage.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The selected VT location must be stated."],"distinction":"The selected VT location must be stated. 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":"Utility-side voltage measurement"},{"label":"Output / connection","value":"Live-side synchronising voltage"},{"label":"Lookup label","value":"MPLVS 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-island-side-voltage-selector"],"artwork":"pi26-microgrid-pcc-live-side-voltage-selector","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"microgrids","family":"microgrid-sync","input":"Utility-side voltage measurement","output":"Live-side synchronising voltage"},"plainEnglish":{"title":"What this block does","introduction":"Identifies the utility-side voltage reference supplied to the PCC synchronising function.","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 “Utility-side voltage measurement” at the input and “Live-side synchronising voltage” at the output. The selected VT location must be stated.","drawings":"Start at the named input: Utility-side voltage measurement. Identify its source device or document and the state represented on the drawing. Follow the named output: Live-side synchronising voltage. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Utility-side voltage measurement"},{"name":"Output","meaning":"Live-side synchronising voltage"},{"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":["Utility-side voltage measurement","MPLVS","Live-side synchronising voltage"],"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-pcc-live-side-voltage-selector","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/microgrid-pcc-live-side-voltage-selector.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."}]}