Generator Set FAQ

Answers on generator ratings, voltage and frequency, fuel systems, configuration, lead time, warranty and operation in demanding environments.

Generator sets are rated under two international definitions:

  • PRP (Prime Rated Power) — for continuous or long-hour operation with variable load; average load factor may reach 70% of PRP.
  • ESP (Standby Rated Power) — for emergency backup only; limited running hours, no overload capacity.

Ratings are expressed in kVA / kW at a power factor of 0.8 (1 kVA = 0.8 kW), together with allowable continuous running hours. Before selecting a unit, always confirm whether the application is prime or standby.

There are two worldwide systems: 50 Hz / 1500 rpm, used by the majority of global markets; and 60 Hz / 1800 rpm, mainly used in North America, parts of Latin America and selected Asian and Middle Eastern markets.

Typical three-phase voltages are 480 V / 240 V / 208 V at 60 Hz and commonly 400 V at 50 Hz. Before ordering, always confirm three parameters together: frequency + phase + voltage.

We currently build on two engine platforms:

  • Cummins (Sino-American joint venture) — a globally recognized premium brand, accepted in every market.
  • DAF POWER (premium Chinese engine) — dependable quality and our flagship house brand.
  • DAF POWER alternator — our main option: stable, reliable and cost-effective, designed to Stamford specifications.
  • Leroy-Somer — a first-tier global alternator brand with a wholly foreign-owned plant in Fuzhou.
  • Stamford — a first-tier global alternator brand within Cummins Group.

All units come standard with brushless alternators and all-copper windings for stable, reliable output.

All units come standard with a fuel tank sized for 8 hours of continuous operation at 100% load; the tank is base-mounted or top-mounted depending on the model. Fuel consumption at 100% and 75% load varies by engine model, and matched figures are provided with each model’s datasheet.

Obtén tu solución energética

El suministro de energía confiable comienza con una conversación. Desde 2009, DAF POWER ha proporcionado apoyo integral —desde la selección hasta la entrega— para proyectos de ingeniería a nivel mundial, instalaciones comerciales y aplicaciones industriales.