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56 technical questions and answers of diesel generator set–no. 25

21. The frequency of a generator set is stable, but the voltage is unstable. The problem lies in the engine or the generator?

Answer: It lies in the generator.

22. What happened to the loss of magnetism of the generator and how to deal with it?

Answer: The generator is not used for a long time, causing the remanence contained in the iron core to be lost before leaving the factory, and the excitation coil cannot build the proper magnetic field. At this time, the engine is running normally but no electricity is generated. This kind of phenomenon is a new machine. Or there are more units that have not been used for a long time.

Solution: 1) If there is an excitation button, press the excitation button;

2) if there is no excitation button, use a battery to magnetize it;

3) load a light bulb and run it at overspeed for a few seconds.

23. After using the generator set for a period of time, it is found that everything else is normal but the power drops. What is the main reason?

Answer: a. The air filter is too dirty and the intake air is not enough. At this time, the air filter must be cleaned or replaced.
b. The fuel filter device is too dirty and the fuel injection volume is not enough, so it must be replaced or cleaned.
c. The ignition time is not correct and must be adjusted.

24. After a generator set is loaded, its voltage and frequency are stable, but the current is unstable. What is the problem?

Answer: The problem is that the customer’s load is unstable, and the quality of the generator is absolutely fine.

25. The frequency of a generator set is unstable. What is the main problem?

Answer: The main problem is that the rotation speed of the generator is unstable.


Post time: May-26-2021

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