Overview#
The Blue Star NG400-01P is the prime-rated variant of the NG400-01, delivering 375 kWe continuously on natural gas (250 kWe on LP). It uses the identical PSI 21.9L V12 platform and physical enclosure as the standby NG400-01. Three-phase only — no single-phase option.
Standby vs. prime on the NG400 platform#
| NG400-01 (Standby) | NG400-01P (Prime) | |
|---|---|---|
| Output NG | 400 kWe | 375 kWe |
| Output LP | 300 kWe | 250 kWe |
| Warranty | 2 yr / 2,000 hr | 1 yr / 1,500 hr |
| NG fuel @ 100% | 4,521 ft³/hr | 4,232 ft³/hr |
| Deration base | 97°F / 3,200 ft | 77°F / 1,200 ft |
| Temp rise | 125°C standby | 105°C prime |
Both share the same OPU footprint (156 × 86 × 98 in, 10,850 lbs) and DSE DCP7310 controller.
Note on deration: The NG400-01P prime variant uses standard deration thresholds (77°F / 1,200 ft), while the standby NG400-01 has extended tolerance (97°F / 3,200 ft). At high-altitude or high-ambient sites, verify which rating applies to the duty cycle before specifying.
Alternator configurations#
The NG400-01P is three-phase only:
| Voltage | Phase | Alternator | Connection |
|---|---|---|---|
| 120/208V | 3 | Stamford HCI534C | 12-lead WYE |
| 240V | 3 | Stamford HCI534C | 12-lead DELTA |
| 277/480V | 3 | Stamford S4L1D-F41 | 12-lead WYE |
| 347/600V | 3 | Stamford HCI534C | 4-lead WYE |
All carry 105°C prime temperature rise and ±0.5% voltage regulation.
When to spec the NG400-01P#
- 300–375 kW continuous or prime duty on natural gas or LP (three-phase only)
- Large commercial, hospitality, hospital, or data center facilities with confirmed prime-duty load profiles
- Projects requiring prime-rated certification at 400 kW class on gaseous fuel
Our service experience#
Service procedures are identical to the NG400-01. The prime-duty use pattern means higher annual hour accumulation on the V12 — budget for 12-cylinder spark plug and ignition coil service (more frequent than standby units) and confirm oil/coolant change intervals with PSI's prime-duty maintenance schedule.
