Is the rated power of a diesel generator the useful power? For example, if the generator is marked with a rated power of 200KW, what is its actual power output?

The term "no actual power for a generator set" usually refers to the rated power (RATED POWER) and standby power (STANDBY POWER). The rated power is 200KW, indicating that the set can run at a load of 200KW continuously for about 12 hours. The standby power is typically 1.1 times the rated power, and the generator set should not operate at the standby power load continuously for more than an hour. For instance, if the rated power is 200KW, the standby power would be 220KW. This means the set can handle a load of up to 220KW, but it should not be loaded at 220KW for more than an hour continuously. In areas where power is out for extended periods, the set is used as the primary power source, and calculations are based on the rated power. In areas with occasional power outages but a need for continuous power, a generator set is purchased as a backup, and calculations can be made using the standby power.