{"schemaVersion":1,"slug":"gas-engine-generator-set","name":"Gas engine generator set","kind":"symbol","abbreviation":"GG","aliases":["gas genset","natural gas generator set","spark-ignited generator"],"category":"microgrid-systems","drawingTypes":["SLD"],"referenceFamilies":["IEC","IEEE / ANSI","Manufacturer"],"summary":"A spark-ignited reciprocating engine on natural gas, biogas or LPG driving an alternator, shown as a generating source.","description":["A gas engine generator set uses a spark-ignited reciprocating engine running on natural gas, biogas, landfill gas or LPG. These sets are common in combined heat and power plants, prime power microgrids and sites with a reliable gas supply, and they are often run continuously rather than only as backup.","Single-line diagrams draw the alternator circle with an engine block marked G or GAS, the generator breaker, and sometimes heat recovery references. When several sets run in parallel, a common synchronising bus and a load-sharing controller appear alongside.","Gas engines usually accept large load steps less readily than diesel engines, which affects how a microgrid sequences load after a blackout. The symbol does not express block-load acceptance, gas pressure requirements or emissions limits."],"readingNotes":["Check the load-step limits in the controller documents before assuming the set can pick up a whole bus at once.","Heat recovery or CHP notes indicate continuous running."],"drawingChecklist":["State fuel type and rating basis.","Show breaker and synchronising arrangement.","Reference load acceptance and start sequence."],"distinction":"A gas engine set uses spark ignition and gaseous fuel; a gas turbine generator uses a continuous-combustion turbine.","facts":[{"label":"Prime mover","value":"Spark-ignited reciprocating engine"},{"label":"Fuels","value":"Natural gas, biogas, LPG"},{"label":"Typical role","value":"Prime power or CHP"},{"label":"Preview","value":"Independent educational illustration; not a manufacturer outline"}],"references":[{"sourceId":"generator-controls","relevance":"Public generator paralleling and switchgear context."},{"sourceId":"s28-deif-hybrid-microgrid","relevance":"Public hybrid microgrid context combining gensets, solar, storage and mains."}],"related":["diesel-generator-set","gas-turbine-generator","generator-package","25-synchronism-check"],"artwork":"s28-gas-engine-generator-set","publishedOn":"2026-10-28","updatedOn":"2026-10-28","provenance":"independent-public-research","plainEnglish":{"title":"What does Gas engine generator set mean?","introduction":"A gas engine generator set uses a spark-ignited reciprocating engine running on natural gas, biogas, landfill gas or LPG. These sets are common in combined heat and power plants, prime power microgrids and sites with a reliable gas supply, and they are often run continuously rather than only as backup.","example":"Single-line diagrams draw the alternator circle with an engine block marked G or GAS, the generator breaker, and sometimes heat recovery references. When several sets run in parallel, a common synchronising bus and a load-sharing controller appear alongside.","drawings":"Gas engines usually accept large load steps less readily than diesel engines, which affects how a microgrid sequences load after a blackout. The symbol does not express block-load acceptance, gas pressure requirements or emissions limits.","terms":[{"name":"Schematic","meaning":"A drawing showing function and connections rather than physical appearance."}],"diagram":"flow","steps":["Identify the device and form","Read the connections and state","Check the equipment reference"],"caption":"A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram.","sources":[{"label":"Generator switchgear and paralleling controls","url":"https://www.cummins.com/en-na/generators/products/switchgear"},{"label":"Reliable hybrid power and microgrid solutions","url":"https://www.deif.com/applications/power-generation/reliable-hybrid-power-and-microgrid-solutions/"}],"detail":"A spark-ignited reciprocating engine on natural gas, biogas or LPG driving an alternator, shown as a generating source. A gas engine set uses spark ignition and gaseous fuel; a gas turbine generator uses a continuous-combustion turbine.","profileId":"reviewed-symbol-20261028"},"url":"https://eloragrid.ai/symbols/gas-engine-generator-set","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/gas-engine-generator-set.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"generator-controls","title":"Generator switchgear and paralleling controls","publisher":"Cummins","url":"https://www.cummins.com/en-na/generators/products/switchgear","type":"manufacturer","scope":"Public description of generator switchgear, controls and system interfaces.","checkedOn":"2026-10-13","reuse":"link-only","relevance":"Public generator paralleling and switchgear context."},{"id":"s28-deif-hybrid-microgrid","title":"Reliable hybrid power and microgrid solutions","publisher":"DEIF","url":"https://www.deif.com/applications/power-generation/reliable-hybrid-power-and-microgrid-solutions/","type":"manufacturer","scope":"Public hybrid and microgrid control context combining gensets, PV, storage and mains.","checkedOn":"2026-10-28","reuse":"link-only","relevance":"Public hybrid microgrid context combining gensets, solar, storage and mains."}]}