{"schemaVersion":1,"slug":"ground-and-test-device-indication","name":"Ground-and-test device indication","kind":"symbol","abbreviation":"GDI","aliases":["Switchgear test and commissioning interfaces","switchgear Switchgear test and commissioning interfaces","switchgear","Switchgear","Test-device position","Device-present status"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Identifies the documented test-device insertion and position information at a switchgear compartment.","description":["Identifies the documented test-device insertion and position information at a switchgear compartment. A test interface separates measurement, command and indication paths so their behavior can be checked in the documented test configuration. The test boundary must show which real equipment outputs remain enabled.","In a switchgear relay panel, test links can separate a protective relay from the trip coils while maintaining the specified current-transformer secondary arrangement. For this reference, the drawing identifies “Test-device position” at the input and “Device-present status” at the output. The device function follows its manufacturer instructions.","Trace the source and destination on each side of the test boundary. Use the selected test-device instructions for actual operations and never infer a safe current-transformer switching sequence from an educational diagram. 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: Test-device position. Identify its source device or document and the state represented on the drawing.","Follow the named output: Device-present status. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The device function follows its manufacturer instructions.","Trace the source and destination on each side of the test boundary. Use the selected test-device instructions for actual operations and never infer a safe current-transformer switching sequence from an educational diagram."],"drawingChecklist":["Label the source and connection reference for test-device position.","Identify the destination and defined state of device-present status.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The device function follows its manufacturer instructions."],"distinction":"The device function follows its manufacturer instructions. 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":"Switchgear"},{"label":"Input / boundary","value":"Test-device position"},{"label":"Output / connection","value":"Device-present status"},{"label":"Lookup label","value":"GDI is a library lookup label, not a standard device designation."}],"references":[{"sourceId":"pi26-masterclad","relevance":"Public technical context for switchgear test and commissioning interfaces. Breaker control, mechanism, position contacts, racking interlocks and test interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation."}],"related":["relay-test-block","test-plug","primary-test-boundary-representation"],"artwork":"pi26-ground-and-test-device-indication","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchgear","family":"testing","input":"Test-device position","output":"Device-present status"},"plainEnglish":{"title":"What this block does","introduction":"Identifies the documented test-device insertion and position information at a switchgear compartment.","example":"In a switchgear relay panel, test links can separate a protective relay from the trip coils while maintaining the specified current-transformer secondary arrangement. For this reference, the drawing identifies “Test-device position” at the input and “Device-present status” at the output. The device function follows its manufacturer instructions.","drawings":"Start at the named input: Test-device position. Identify its source device or document and the state represented on the drawing. Follow the named output: Device-present status. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Test-device position"},{"name":"Output","meaning":"Device-present status"},{"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":["Test-device position","GDI","Device-present status"],"caption":"A reading guide. The entry's original illustration and input/output facts describe this application.","sources":[{"label":"Masterclad medium-voltage switchgear: circuit-breaker section interlocks","url":"https://productinfo.se.com/masterclad_mv_switchgear_ib/6055-30-masterclad-15kv-mv-switchgear-ib/English/6055-30%20Masterclad%20MV%20Switchgear%20Indoor%20%28bookmap%29_DD00646805.xml/%24/Section6-CircuitBreakerSectionInter-58DD6EC7"}],"profileId":"power-installation-testing"},"url":"https://eloragrid.ai/symbols/ground-and-test-device-indication","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/ground-and-test-device-indication.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"pi26-masterclad","publisher":"Schneider Electric","title":"Masterclad medium-voltage switchgear: circuit-breaker section interlocks","url":"https://productinfo.se.com/masterclad_mv_switchgear_ib/6055-30-masterclad-15kv-mv-switchgear-ib/English/6055-30%20Masterclad%20MV%20Switchgear%20Indoor%20%28bookmap%29_DD00646805.xml/%24/Section6-CircuitBreakerSectionInter-58DD6EC7","scope":"Breaker control, mechanism, position contacts, racking interlocks and test interfaces.","type":"manufacturer","checkedOn":"2026-11-03","reuse":"link-only","relevance":"Public technical context for switchgear test and commissioning interfaces. Breaker control, mechanism, position contacts, racking interlocks and test interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation."}]}