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, indicating a three-phase rated voltage of 400V and a single-phase rated voltage of 230V.

3. Rated Frequency f: According to the national standard, the power frequency unit is 50Hz, and the medium frequency unit is 400Hz.

4. Rated Current I: Refers to the maximum size of the current that the generator stator winding can allow to pass through for a long period of time.

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 speed of the generator rotor at the rated power. Currently, 1500r/min is commonly used for three-phase generator sets, while single-phase generator sets typically operate at 3000r/min.

7. Rated Excitation Current Ir: The direct current passing through the excitation winding of the 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 reached.

9. Excitation Method: Power sources for excitation current can be from outside the generator, known as external excitation, or from the generator itself, known as 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 pole excitation with reversed magnetic field, AC excitation machine, phase compensation with reactor phase shift, resonant phase compensation, third harmonic excitation, and thyristor excitation.

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