{"schemaVersion":1,"slug":"disconnector","name":"Disconnector","kind":"symbol","abbreviation":"Isolator","aliases":["isolation switch","isolator switch","disconnect switch"],"category":"power-distribution","drawingTypes":["SLD","Schematic"],"referenceFamilies":["IEC","IEEE / ANSI"],"summary":"A switching device providing an electrical isolation function.","description":["A disconnector, often called an isolator, provides an isolation function in an electrical circuit. Its representation should be read with the drawing legend and the selected device specification. Do not infer load-breaking or fault-interruption capability simply because a drawing contains a switch-like mark.","In a switchgear SLD the disconnector may appear next to a breaker, earthing switch or bus section. Control drawings can also show position indications and interlocking. The main-circuit representation and the auxiliary indications describe different parts of the equipment."],"readingNotes":["Identify which circuit segment is isolated by the device.","Distinguish the main switching function from its auxiliary position contacts."],"drawingChecklist":["Link the selected device and its isolation capability.","Reference the position indication and interlock documentation.","Show associated earthing arrangements where applicable."],"distinction":"A load-break switch has a specified load-switching capability. A disconnector designation alone does not establish that capability.","facts":[{"label":"Primary role","value":"Isolation"},{"label":"Capability","value":"Confirm against the selected device"},{"label":"Related device number","value":"89: line switch, where the convention applies"}],"references":[{"sourceId":"switching-devices","relevance":"Manufacturer explanation of disconnector and load-breaking functions."},{"sourceId":"abb-switchgear","relevance":"Public secondary-distribution switchgear context."}],"related":["load-break-switch","circuit-breaker","earthing-switch","89-line-switch"],"artwork":"isolator","publishedOn":"2026-10-13","updatedOn":"2026-10-13","provenance":"independent-public-research","url":"https://eloragrid.ai/symbols/disconnector","illustration":{"url":"https://eloragrid.ai/library/illustrations/disconnector.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"switching-devices","title":"Elementary switching devices","publisher":"Schneider Electric — Electrical Installation Guide","url":"https://www.electrical-installation.org/enwiki/Elementary_switching_devices","type":"manufacturer","scope":"Explains disconnectors, load-break switches, contactors and fuses. The manufacturer diagrams remain at the source.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Manufacturer explanation of disconnector and load-breaking functions."},{"id":"abb-switchgear","title":"Secondary-distribution switchgear and ring main units","publisher":"ABB","url":"https://new.abb.com/medium-voltage/switchgear/secondary-distribution","type":"manufacturer","scope":"Public equipment families for secondary distribution. Footprints and ratings must come from the chosen model.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public secondary-distribution switchgear context."}]}