Overview#
The Blue Star NG650-01P is the prime-rated variant of the NG650-01, delivering 550 kWe continuously on natural gas (350 kWe on LP). It uses the identical PSI 32L V12 platform and physical enclosure as the standby NG650-01. Three-phase only — no single-phase option. The NG650-01P carries a 1-year / 1,500-hour prime warranty.
Standby vs. prime on the NG650 platform#
| NG650-01 (Standby) | NG650-01P (Prime) | |
|---|---|---|
| Output NG | 650 kWe | 550 kWe |
| Output LP | 400 kWe | 350 kWe |
| Warranty | 2 yr / 2,000 hr | 1 yr / 1,500 hr |
| NG fuel @ 100% | 7,259 ft³/hr | 6,268 ft³/hr |
| Deration base temp | 77°F | 87°F |
| Deration base altitude | 1,200 ft | 3,000 ft |
| Temp rise | 125°C standby | 105°C prime |
Both share the same OPU footprint (210×96×103 in, 16,175 lbs) and DSE DCP7310 controller.
Alternator configurations#
| Voltage | Phase | Alternator | Connection |
|---|---|---|---|
| 120/208V | 3 | Stamford S6L1D-C | 12-lead WYE |
| 240V | 3 | Stamford S6L1D-C | 12-lead DELTA |
| 277/480V | 3 | Stamford HCI534F | 12-lead WYE |
| 347/600V | 3 | Stamford HCI534F | 4-lead WYE |
All carry 105°C prime temperature rise and ±0.5% voltage regulation.
When to spec the NG650-01P#
- 450–550 kW continuous or prime duty on natural gas or LP (three-phase only)
- Sites requiring prime-rated certification at the 650 kW class on gaseous fuel
- Facilities where the NG650-01P's improved deration base (87°F / 3,000 ft vs. standby 77°F / 1,200 ft) is operationally relevant
Our service experience#
Service procedures are identical to the NG650-01 standby. Prime-duty use means higher annual hour accumulation on the V12 — plan for more frequent spark plug and ignition coil service intervals per PSI's prime-duty schedule.
