Pramac GA 20000 17kVA Mains Natural Gas or 20kVA LPG 3-Phase 400V Generator
A fixed automatic-backup generator for three-phase properties that require dependable standby power. The Pramac GA 20000 provides up to 17kVA on mains natural gas or 20kVA on LPG at 400V, 50Hz.
- 17kVA standby output on natural gas or 20kVA standby output on LPG, at 400V three-phase.
- Generac G-FORCE 1000 Series, 999cc air-cooled gas engine with electronic governor and electric starting.
- Sound-attenuated aluminium enclosure, Wi-Fi monitoring as standard and compatibility with Pramac LTS load transfer switches.
Pramac GA 20000 3-Phase Natural Gas and LPG Backup Generator
The Pramac GA 20000 is a three-phase 400V standby generator for automatic backup-power applications. It can operate on either mains natural gas or LPG, making it suitable for commercial premises, farms, larger homes, workshops and sites where a properly specified fuel supply is available.
The generator delivers 17,000VA standby power on natural gas and 20,000VA standby power on LPG. It is designed for emergency power during utility outages and has no overload capability at its standby rating. A compatible load transfer switch is required for automatic mains-to-generator changeover.
Key features
- Dual-fuel operation: runs on mains natural gas or LPG, allowing the fuel choice to be matched to site infrastructure.
- Three-phase standby output: 400V, 50Hz, three-phase output for suitable commercial and larger-property backup loads.
- Automatic backup capability: compatible with Pramac LTS load transfer switch accessories for managed changeover between mains and generator supply.
- True Power electrical technology: stated total harmonic distortion of less than 5% for compatibility with electronic equipment.
- Remote monitoring: Wi-Fi communications and free Mobile Link Wi-Fi remote monitoring through the app are listed as standard.
Where to use
The Pramac GA 20000 is suited to fixed standby installations at offices, workshops, agricultural sites, retail premises, telecoms locations, larger homes and other three-phase properties. It can support selected or whole-site loads only where the load profile, incoming supply and changeover design have been properly assessed.
It is particularly suitable where a reliable natural-gas connection is present or where an appropriately sized LPG installation is preferred. The fuel pipework must be sized for full-load operation and maintain the required inlet pressure throughout the generator’s operating range.
This generator is not an out-of-the-box installation. A competent generator, electrical and Gas Safe installation team should specify the fuel supply, concrete or composite base, cable sizing, earthing arrangement, load-transfer switch, exhaust clearances and commissioning requirements. Energian can provide UK expert support and help you identify trusted installation partners.
Technical specifications
| Model | Pramac GA 20000 |
| Generator type | Air-cooled gas-engine automatic backup power generator |
| Fuel | Natural gas or LP gas |
| Frequency | 50Hz |
| Voltage | 400V |
| Phase | 3 |
| Power factor | 0.8 |
| Standby power, LPG | 20,000VA / 20kVA |
| Standby power, natural gas | 17,000VA / 17kVA |
| Rating standard | Standby rating in accordance with BS 5514, ISO 3046 and DIN 6271 |
| Standby-rating definition | Applicable for supplying emergency power for the duration of a utility power outage; no overload capability is available for this rating. |
| Engine brand | Generac |
| Engine model | G-FORCE 1000 Series |
| Engine type | OHV |
| Engine cooling system | Air |
| Number of cylinders and disposition | 2, V angle |
| Engine displacement | 999cm³ |
| Compression ratio | 9.5:1 |
| Starting system | Electric |
| Electric circuit voltage | 12V |
| Speed governor | Electronic |
| Nominal operating speed | 3,000rpm |
| Oil capacity | 1.8L |
| Natural-gas fuel consumption at 50% load | 4.50m³/h |
| Natural-gas fuel consumption at 100% load | 7.02m³/h |
| LPG fuel consumption at 50% load | 6.83L/h |
| LPG fuel consumption at 100% load | 10.86L/h |
| Natural-gas inlet pressure requirement | 0.87–1.74kPa; 3.5–7in water column |
| LPG inlet pressure requirement | 2.49–2.99kPa; 10–12in water column |
| Fuel-value basis for stated outputs | Natural gas: 1,000Btu/ft³ or 37.26MJ/m³; LPG: 2,500Btu/ft³ or 93.15MJ/m³ |
| Voltage regulation system | AVR |
| Alternator phases | 3 |
| Alternator poles | 2 |
| Maximum current, LPG | 28.87A |
| Maximum current, natural gas | 24.54A |
| Circuit breaker | 32A |
| Electrical waveform quality | True Power Technology; less than 5% total harmonic distortion (THD) |
| Voltage regulation accuracy | Automatic voltage regulation to 1% |
| Length | 1,232mm |
| Width | 648mm |
| Height | 733mm |
| Dry weight | 220kg |
| Guaranteed noise level (LWA) | 95dB(A) |
| Quiet-Test Mode | 59dB(A) |
| Enclosure | Sound-attenuated aluminium enclosure |
| Controller | Two-line LCD multilingual digital Evolution controller |
| Controller mode buttons | Auto / Manual / Off illuminated buttons |
| Monitoring | Wi-Fi communications standard; free Mobile Link Wi-Fi remote monitoring through app |
| Generator status information | System status and maintenance-interval LED indicators; engine run-hours indication; maintenance messages and maintenance logs |
| Exercise programme | Programmable seven-day exerciser; factory setting runs for 5 minutes every other week; weekly or monthly setting selectable |
| Utility voltage sensing | 65% dropout; 80% pick-up of standard voltage |
| Utility interrupt delay | Adjustable 2–1,500 seconds; factory default 5 seconds, by qualified dealer |
| Engine warm-up | Approximately 5 seconds |
| Engine cool-down | Approximately 1 minute |
| Engine start sequence | Cyclic cranking: 16 seconds on, 7 seconds rest, 90 seconds maximum duration |
| Standard protections | Over/under-voltage protection, under-frequency, overload, stepper overcurrent, fused safety, fuse-problem protection, low oil pressure, high oil temperature, overcrank, overspeed at 72Hz/rpm-sense loss, high engine temperature, internal fault, incorrect-wiring protection and common external-fault capability |
| Battery charger | Smart battery charger; compatible with lead-acid and AGM-style batteries |
| Flexible fuel connector | 305mm flexible fuel-line connector |
| Mounting base | Direct-to-dirt composite mounting pad |
| Wind resistance | Enclosure stated to withstand winds up to 240km/h |
| Warranty | 5-year limited warranty |
| Compatible accessory | LTS load transfer switch accessories |
Documents available for download
Shipping
Available for delivery to the UK, Ireland, Africa, the Caribbean and worldwide. If the shipping rate is not shown at checkout, please contact us on +44 2080 640335 or info@energian.co.uk for a quote.
UK expert support
UK expert support is available. Contact us with any questions or support requests by telephone, email or live chat, or visit our office for an in-person consultation. Energian can help assess site load, phase balance, generator fuel choice, natural-gas or LPG supply requirements, LTS changeover selection and integration with solar, battery or critical-load systems.