1. Rated Power P(kW) or S(kVA): P is the generator's active output 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: The national standard specifies that the power frequency units are 50Hz, and the medium frequency units are 400Hz.

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

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, three-phase generator sets commonly use 1500 r/min, while single-phase generator sets typically use 3000 r/min.

7. Rated excitation current Ir: The direct current flowing through the excitation winding of an alternating current 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 Mode: Power sources for excitation current are categorized as external excitation (from outside the generator) and internal excitation (from the generator itself). Both are collectively referred to as excitation modes. External excitation comes in two types: shunt excitation and compound excitation. Internal excitation includes various types such as pole excitation with reversed magnetic field, AC excitation machine, 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.