{"schemaVersion":1,"slug":"induced-current-earthing-switch-duty-reference","name":"Induced-current earthing-switch duty reference","kind":"symbol","abbreviation":"IEDR","aliases":["Disconnector and earthing applications","switchyards Disconnector and earthing applications","switchyards","Switchyards","Induced circuit condition","Specified earthing switching role"],"category":"power-distribution","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Identifies an earthing application with its separately specified induced-current switching duty.","description":["Identifies an earthing application with its separately specified induced-current switching duty. 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 “Induced circuit condition” at the input and “Specified earthing switching role” at the output. The duty requires an explicitly rated device.","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: Induced circuit condition. Identify its source device or document and the state represented on the drawing.","Follow the named output: Specified earthing switching role. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The duty requires an explicitly rated device.","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 induced circuit condition.","Identify the destination and defined state of specified earthing switching role.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The duty requires an explicitly rated device."],"distinction":"The duty requires an explicitly rated device. 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":"Induced circuit condition"},{"label":"Output / connection","value":"Specified earthing switching role"},{"label":"Lookup label","value":"IEDR 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","fast-earthing-switch-functional-reference"],"artwork":"pi26-induced-current-earthing-switch-duty-reference","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchyards","family":"yard-disconnectors","input":"Induced circuit condition","output":"Specified earthing switching role"},"plainEnglish":{"title":"What this block does","introduction":"Identifies an earthing application with its separately specified induced-current switching duty.","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 “Induced circuit condition” at the input and “Specified earthing switching role” at the output. The duty requires an explicitly rated device.","drawings":"Start at the named input: Induced circuit condition. Identify its source device or document and the state represented on the drawing. Follow the named output: Specified earthing switching role. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Induced circuit condition"},{"name":"Output","meaning":"Specified earthing switching role"},{"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":["Induced circuit condition","IEDR","Specified earthing switching role"],"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/induced-current-earthing-switch-duty-reference","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/induced-current-earthing-switch-duty-reference.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."}]}