1. Rated Power P(kW) or S(kVA): P is the active power output of the generator (P=√3IVcosφ), S is the apparent power of the generator (S=√3IV).

2. Rated Voltage V: Typically marked as 400V/230V, indicating the three-phase rated voltage is 400V and the single-phase rated voltage is 230V.

3. Rated Frequency f: National standard specifies 50Hz for power frequency units, and 400Hz for intermediate frequency units.

4. Rated Current I: Refers to the maximum current that the stator winding of the generator is permitted to carry continuously.

5. Rated power factor cosφ: Three-phase generator is 0.8 (lagging), single-phase generator is 0.9 (lagging) and 1.0.

6. Rated Speed n: The rotational speed of the generator's rotor at the rated power. Currently, 1500r/min is commonly used for three-phase generator sets, while single-phase generator sets typically use 3000r/min.

7. Rated Excitation Current Ir: The direct current flowing through the excitation winding of an AC generator under rated load conditions.

8. Rated Excitation Voltage Vf: The direct voltage applied to the excitation winding when the rated excitation current is applied.

9. Excitation Method: Power sources that provide excitation current, coming from outside the generator are called external excitation, and those from the generator itself are called self-excitation. Both external and self-excitation are collectively referred to as excitation methods. The external excitation method is divided into two types: shunt excitation and compound excitation; while the self-excitation method includes types such as convex pole reverse magnetic field excitation, AC exciter excitation, reactor phase-shifting excitation, resonance phase-shifting excitation, third harmonic excitation, and SCR excitation, among others.

10. Reliability Metrics: MTBF - According to GJB235A-1997 "General Specification for Non-Civilian AC Mobile Power Stations," the average failure interval time for diesel engines is specified as 500h, 800h, and 1000h.