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Consequences of Overloading Diesel Generator Sets

Jul. 08, 2025

It is extremely unsafe for a diesel generator set to operate under overload, and overloading is strictly prohibited. So, what are the consequences of overloading a diesel generator set? Dingbo Power, a generator manufacturer, believes that overloading a diesel generator not only leads to high fuel consumption but also more easily causes generator set malfunctions that require repair.


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In general, when the load of a diesel generator set is 80% of the rated load, the fuel consumption is normally at its minimum. If the load increases, the fuel consumption will rise. The fuel consumption of a diesel generator set is directly proportional to the load. However, if the load is lower than 20%, it will have an impact on the diesel generator set. Not only will the fuel consumption of the unit increase significantly, but it may even damage the generator set.

 

Therefore, to reduce the fuel consumption of a diesel generator, the unit can be operated at around 80% of the rated load. Running at a low load for a long time will actually increase fuel consumption and may even damage the unit. Remember, overloading a diesel generator set not only results in high fuel consumption but also more easily causes malfunctions that require repair.

 

Overloading a diesel generator set can easily lead to the following malfunctions:

1.It is easy to damage the engine cylinder gasket.

2.It can easily increase the thermal and mechanical loads on the cylinder liner.

3.The turbocharger of the ultra - silent generator set will turn red. After being exposed to high temperatures for a long time, the turbocharger will be damaged.

4.Malfunctions such as cylinder scoring and bearing burnout are also likely to occur.

5.The generator will have difficulty dissipating heat due to overloading, and the coils may be punctured and burned out.

 

After a diesel generator set operates under overload, oil may overflow from the fuel tank opening, and the high - pressure oil pipe may wear and leak. When a diesel generator set is delivered and accepted, it is an essential item for the generator manufacturer to train users on the normal operating procedures of the diesel generator set. Users must study these procedures carefully and put them into practice. Many serious malfunctions often occur due to users' negligence and non - standard operations, which we must take as a warning.

 

Dingbo Power has advanced testing equipment, modern production technology, professional manufacturing technology, perfect quality management system, and strong technical research and development capabilities. It can provide 3KW~2500KW various specifications of ordinary, automatic, four protection, automatic switching, low noise and mobile generator sets, high quality and low energy consumption to meet the diverse power needs of customers, and can also meet users with different voltages and different frequencies. It is required to create a parallel power supply system for multiple units. If you are interested in our product or any question on generator, welcome to send email to [email protected].

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