What the Ground Power Unit Connected symbol means
A GPU provides external electrical power while the aircraft is on the ground.
Where you may see this symbol
This entry belongs to the Specialist section and is grouped under Airport ground. It is commonly encountered at GPU / ground-support control panel. Depending on the vehicle, vessel or machine, it may appear as a lamp, display message, annunciator or control-panel symbol.
How this symbol usually looks
400 Hz AC and DC systems use different connectors/ratings.
Common versions you may see
The examples below show a few realistic ways this symbol may appear. Exact geometry, wording, framing and flashing behaviour can vary by manufacturer and system design.
Primary reference
Primary reference appearance for this symbol or indicator.
Alternative annunciator wording
Aircraft and equipment annunciators often change wording, line length or abbreviation.
Integrated display style
Glass cockpits and MFD pages may show the same alert as a text message rather than a lamp.
Detailed explanation and operating context
Ground Power Unit Connected is indexed on SymbolDeck so users can find it by a specific symbol name or by plain-language searches such as “what does this warning light mean?” The page is designed to help with fast visual identification while still giving enough context to understand the system behind the symbol.
Status is SymbolDeck’s general-reference urgency classification for this entry. Real-world urgency can change with operating state, multiple simultaneous warnings, environmental conditions and manufacturer logic. Approved documentation should always take precedence.
Safety note
For safety-critical road, aviation, marine, rail or machinery operation, this page is for identification and learning only. Approved manuals, checklists, rulebooks, placards and qualified personnel take precedence.