{"schemaVersion":1,"slug":"line-disconnector-earthing-switch-association","name":"Line-disconnector earthing-switch association","kind":"symbol","abbreviation":"LEA","aliases":["Disconnector and earthing applications","switchyards Disconnector and earthing applications","switchyards","Switchyards","Line isolator and earth switch","Line-section device association"],"category":"power-distribution","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Links the line isolating device and the earthing device serving the named line section.","description":["Links the line isolating device and the earthing device serving the named line section. Disconnector and earthing references identify different mechanical constructions and connection duties within a yard. The primary diagram shows which conductors are joined or earthed; the equipment drawing explains how its contacts and supports move.","In a switchyard bay, a bus selector can use a different physical construction from a line disconnector. Each device still needs an identified operating mechanism, position indication and interlocking interface. For this reference, the drawing identifies “Line isolator and earth switch” at the input and “Line-section device association” at the output. The complete circuit can include remote energy sources.","The construction name does not establish load-breaking capability, short-circuit making duty or operating permission. Verify these properties in the selected equipment data and the station interlocking scheme. 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: Line isolator and earth switch. Identify its source device or document and the state represented on the drawing.","Follow the named output: Line-section device association. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The complete circuit can include remote energy sources.","The construction name does not establish load-breaking capability, short-circuit making duty or operating permission. Verify these properties in the selected equipment data and the station interlocking scheme."],"drawingChecklist":["Label the source and connection reference for line isolator and earth switch.","Identify the destination and defined state of line-section device association.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The complete circuit can include remote energy sources."],"distinction":"The complete circuit can include remote energy sources. 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":"Switchyards"},{"label":"Input / boundary","value":"Line isolator and earth switch"},{"label":"Output / connection","value":"Line-section device association"},{"label":"Lookup label","value":"LEA is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-disconnectors","relevance":"Public technical context for disconnector and earthing applications. Disconnector construction, earthing switches and operating mechanisms. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["disconnector","earthing-switch","motor-operated-disconnector-limit-switch-interface"],"artwork":"pi26-line-disconnector-earthing-switch-association","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchyards","family":"yard-disconnectors","input":"Line isolator and earth switch","output":"Line-section device association"},"plainEnglish":{"title":"What this block does","introduction":"Links the line isolating device and the earthing device serving the named line section.","example":"In a switchyard bay, a bus selector can use a different physical construction from a line disconnector. Each device still needs an identified operating mechanism, position indication and interlocking interface. For this reference, the drawing identifies “Line isolator and earth switch” at the input and “Line-section device association” at the output. The complete circuit can include remote energy sources.","drawings":"Start at the named input: Line isolator and earth switch. Identify its source device or document and the state represented on the drawing. Follow the named output: Line-section device association. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Line isolator and earth switch"},{"name":"Output","meaning":"Line-section device association"},{"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":["Line isolator and earth switch","LEA","Line-section device association"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Disconnectors and earthing switches","url":"https://www.siemens-energy.com/global/en/home/products-services/product-offerings/disconnectors-earthing-switches.html"}],"profileId":"power-installation-yard-disconnectors"},"url":"https://eloragrid.ai/symbols/line-disconnector-earthing-switch-association","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/line-disconnector-earthing-switch-association.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-disconnectors","publisher":"Siemens Energy","title":"Disconnectors and earthing switches","url":"https://www.siemens-energy.com/global/en/home/products-services/product-offerings/disconnectors-earthing-switches.html","scope":"Disconnector construction, earthing switches and operating mechanisms.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for disconnector and earthing applications. Disconnector construction, earthing switches and operating mechanisms. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}