{"schemaVersion":1,"slug":"primary-test-boundary-representation","name":"Primary test-boundary representation","kind":"symbol","abbreviation":"PTR","aliases":["Switchgear test and commissioning interfaces","switchgear Switchgear test and commissioning interfaces","switchgear","Switchgear","Defined primary test circuit","Selected test boundary"],"category":"control-circuits","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"Marks the electrical boundary included in the documented primary test arrangement.","description":["Marks the electrical boundary included in the documented primary test arrangement. 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 “Defined primary test circuit” at the input and “Selected test boundary” at the output. The symbol does not give a test voltage or procedure.","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: Defined primary test circuit. Identify its source device or document and the state represented on the drawing.","Follow the named output: Selected test boundary. Cross-reference its destination and separate the command from confirmation that the equipment responded.","The symbol does not give a test voltage or procedure.","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 defined primary test circuit.","Identify the destination and defined state of selected test boundary.","Record the equipment or control-document revision supporting this functional block.","Check this application limit in the project design: The symbol does not give a test voltage or procedure."],"distinction":"The symbol does not give a test voltage or procedure. 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":"Defined primary test circuit"},{"label":"Output / connection","value":"Selected test boundary"},{"label":"Lookup label","value":"PTR 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","protection-test-mode-status-input"],"artwork":"pi26-primary-test-boundary-representation","publishedOn":"2026-11-03","updatedOn":"2026-11-03","provenance":"independent-public-research","representation":{"type":"functional-block","focus":"switchgear","family":"testing","input":"Defined primary test circuit","output":"Selected test boundary"},"plainEnglish":{"title":"What this block does","introduction":"Marks the electrical boundary included in the documented primary test arrangement.","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 “Defined primary test circuit” at the input and “Selected test boundary” at the output. The symbol does not give a test voltage or procedure.","drawings":"Start at the named input: Defined primary test circuit. Identify its source device or document and the state represented on the drawing. Follow the named output: Selected test boundary. Cross-reference its destination and separate the command from confirmation that the equipment responded.","terms":[{"name":"Input","meaning":"Defined primary test circuit"},{"name":"Output","meaning":"Selected test boundary"},{"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":["Defined primary test circuit","PTR","Selected test boundary"],"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/primary-test-boundary-representation","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/primary-test-boundary-representation.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."}]}