Overview#
The Blue Star NG800-01P is the prime-rated variant of the NG800-01, delivering 660 kWe continuously on natural gas (400 kWe on LP). It uses the identical PSI 40L V12 platform and physical enclosure as the standby NG800-01. Three-phase only — no single-phase option. The NG800-01P carries a 1-year / 1,500-hour prime warranty. UL 2200 listing applies through 600VAC only; the 4160V configuration is not UL-listed.
Standby vs. prime on the NG800 platform#
| NG800-01 (Standby) | NG800-01P (Prime) | |
|---|---|---|
| Output NG | 800 kWe | 660 kWe |
| Output LP | 475 kWe | 400 kWe |
| Warranty | 2 yr / 2,000 hr | 1 yr / 1,500 hr |
| NG fuel @ 100% | 9,726 ft³/hr | 7,912 ft³/hr |
| Deration base temp | 77°F | 87°F |
| Deration base altitude | 1,200 ft | 5,000 ft |
| Temp rise | 125°C standby | 105°C prime |
Both share the same OPU footprint (210×96×103 in, 16,975 lbs), DSE DCP7310 controller, and 30 in. WC fuel pressure requirement.
Note on deration: The NG800-01P prime has substantially better deration tolerance than the standby NG800-01 — 87°F / 5,000 ft vs. 77°F / 1,200 ft. This is one of the most extreme deration differentials between standby and prime variants in the Blue Star gaseous catalog.
Alternator configurations#
| Voltage | Phase | Alternator | Connection |
|---|---|---|---|
| 120/208V | 3 | Stamford S6L1D-D | 12-lead WYE |
| 240V | 3 | Stamford S6L1D-D | 12-lead DELTA |
| 277/480V | 3 | Stamford S6L1D-C | 12-lead WYE |
| 347/600V | 3 | Stamford S6L1D-C | 4-lead WYE |
| 4160V | 3 | Stamford MVWI734E | 6-lead WYE |
All carry 105°C prime temperature rise and ±0.5% voltage regulation.
UL listing: UL 2200, cUL, and CSA certifications apply through 600VAC only. The 4160V configuration is not UL-listed.
Fuel pressure requirement#
Like the standby NG800-01, the NG800-01P requires 30 in. water column inlet fuel pressure. This must be sustained under full prime load — verify site gas infrastructure capacity before specifying.
When to spec the NG800-01P#
- 550–660 kW continuous or prime duty on natural gas or LP (three-phase only)
- High-altitude or high-ambient sites where the exceptional 87°F / 5,000 ft deration tolerance is required
- Sites with 4160V distribution where prime-rated gaseous generation is needed
- Facilities with confirmed prime-duty load profiles at the 800 kW class
Our service experience#
Service procedures are identical to the NG800-01 standby. Prime-duty use on a 40L V12 (38.6 gal oil, 12 cylinders) means significant maintenance volumes — budget accordingly for more frequent spark plug, ignition coil, and fluid service intervals per PSI's prime-duty schedule.
