Overview#
The Blue Star NG500-01P is the prime-rated variant of the NG500-01, delivering 450 kWe continuously on natural gas (350 kWe on LP). It uses the identical PSI 32L V12 platform and physical enclosure as the standby NG500-01. Three-phase only — no single-phase option. The NG500-01P carries a 1-year / 1,500-hour prime warranty.
Standby vs. prime on the NG500 platform#
| NG500-01 (Standby) | NG500-01P (Prime) | |
|---|---|---|
| Output NG | 500 kWe | 450 kWe |
| Output LP | 400 kWe | 350 kWe |
| Warranty | 2 yr / 2,000 hr | 1 yr / 1,500 hr |
| NG fuel @ 100% | 5,878 ft³/hr | 5,444 ft³/hr |
| Deration base temp | 97°F | 102°F |
| Deration base altitude | 4,200 ft | 5,000 ft |
| Temp rise | 125°C standby | 105°C prime |
Both share the same OPU footprint (210×96×103 in, 15,500 lbs) and DSE DCP7310 controller.
Note on deration: The NG500-01P prime variant has better deration tolerance than the standby NG500-01 (102°F / 5,000 ft vs. 97°F / 4,200 ft). This is an unusual reversal of the typical pattern where standby units outperform prime variants on deration.
Alternator configurations#
| Voltage | Phase | Alternator | Connection |
|---|---|---|---|
| 120/208V | 3 | Stamford HCI534E | 12-lead WYE |
| 240V | 3 | Stamford HCI534E | 12-lead DELTA |
| 277/480V | 3 | Stamford HCI534D | 12-lead WYE |
| 347/600V | 3 | Stamford HCI534D | 4-lead WYE |
All carry 105°C prime temperature rise and ±0.5% voltage regulation.
When to spec the NG500-01P#
- 375–450 kW continuous or prime duty on natural gas or LP (three-phase only)
- High-altitude or high-ambient sites where the exceptional 102°F / 5,000 ft deration base is required
- Facilities with confirmed prime-duty load profiles at the 500 kW class
Our service experience#
Service procedures are identical to the NG500-01 standby. Prime-duty use accumulates hours faster — budget accordingly for 12-cylinder spark plug and ignition coil service. Confirm oil and coolant change intervals against PSI's prime-duty maintenance schedule.
