Cummins 500 kVA / 400 kW Diesel Generator – Typical Specifications. Standby Power: 500 kVA / 400 kW. Prime Power: 455 kVA / 364 kW. Frequency: 50 Hz. Speed: 1500 RPM. Voltage: 380–440 V, 3 Phase. Power Factor: 0.8. Fuel: Diesel. Engine: Cummins QSZ13-G5, 6-cylinder. Aspiration: Turbocharged and charge-air cooled. Cooling System: Water/liquid cooled. Starting System: 24V DC electric start. Alternator: Brushless, self-excited with AVR. Controller: Automatic digital control panel.