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

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

3. Rated Frequency f: National standard specifies 50Hz for AC generators and 400Hz for medium-frequency generators.

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

5. Rated Power Factor cosφ: 3-phase generator is 0.8 (lagging), single-phase generator is 0.9 (lagging) and 1.0.

6. Rated Speed n: The 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 current voltage applied to the excitation winding when the rated excitation current is applied.

9. Excitation Method: The power source providing excitation current, coming from outside the generator, is called external excitation, while the one coming from the generator itself is 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. The self-excitation method includes various types such as convex pole reverse magnetic field excitation, AC excitation machine excitation, reactance phase-shifting excitation, resonant phase-shifting excitation, third harmonic excitation, and thyristor excitation.

10. Reliability Indicator 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.