Overview#
The Blue Star PD500-01 is a 500-kilowatt EPA Tier 2 diesel standby generator powered by the Perkins 2506C-E15TAG3 — a 15.2-liter, six-cylinder turbocharged and charge-air-cooled engine. The PD500-01 shares the 150×78 in structural steel base footprint with the PD450-01, stepping from Tier 3 (2506D) to Tier 2 (2506C) certification. At 500 kWe, it is the entry point of Blue Star's Tier 2 Perkins lineup.
Blue Star Power Systems (North Mankato, Minnesota) pairs the 2506C-E15TAG3 with a Stamford HCI534D alternator and DSE DCP7310 controller. At 9,525 lbs and 94 dBA full load, the PD500-01 is one of the louder models in the Perkins lineup at this output level. The ambient temperature deration limit tightens to 86°F (30°C) — compared to 104°F (40°C) for the Tier 3 models. Deration: rated power is available to 3,281 ft (1,000 m) at 86°F (30°C).
Tier 2 Entry: The 2506C at 500 kW#
The 2506C series represents the Tier 2 calibration of the 2506 platform — a distinction from the 2506D (Tier 3) used in the PD450. Both displace 15.2 liters from the same six-cylinder block, but the 'C' variant's fuel and combustion calibration targets Tier 2 emissions rather than Tier 3. In practice, the two models differ primarily in emissions certification and ambient temperature rating; the physical footprint, base structure, and alternator frame are similar. Specifiers should confirm project emissions requirements before selecting between the PD450 (Tier 3) and PD500 (Tier 2).
When to spec the PD500-01#
- 475–500 kW three-phase emergency standby loads on diesel fuel at lower-elevation sites with moderate ambient temperatures
- Projects where EPA Tier 2 compliance is acceptable (confirm with AHJ)
- Facilities where the 150×78 in footprint is established from a previous smaller model
- Industrial, healthcare, data center, and municipal applications in the 500 kW tier
Our service experience#
The PD500-01 operates at the upper end of the 2506C platform. Annual full-load testing is strongly recommended. The ambient temperature limit of 86°F (30°C) should be verified against site conditions — sites in warm climates or with restricted generator room ventilation may experience thermal deration. Fuel planning: the 30,600 CFM ventilation requirement is essentially identical to the PD450, so infrastructure sized for the PD450 is compatible with the PD500. Follow the Perkins 2500C generator series maintenance schedule.
