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What should I pay attention to when starting a diesel generator set?

May 17, 2022
 Diesel generator sets have the characteristics of flexibility, less investment, and can be started at any time. However, the starting steps of diesel generator sets are not as simple and easy as imagined. Many new users have certain misunderstandings about the start of diesel generator sets. Diesel generator sets cause adverse effects. So what should be paid attention to when starting the diesel generator set?
1. Preparation before starting
Before starting the engine, it is necessary to check whether the cooling water or antifreeze in the diesel engine water tank is sufficient. If it is lacking, it should be filled up. Pull out the oil dipstick to check whether the lubricating oil is lacking. If it is lacking, add it to the specified "static full" scale line, and then carefully check whether there are hidden faults in the relevant parts.
2. It is strictly forbidden to start the diesel engine with load
Before starting the diesel generator set, it should be noted that the output air switch of the generator must be in the closed state.
After the ordinary diesel engine is started, it needs to go through 3-5 minutes of idling operation (about 700 rpm). In winter, the temperature is low, and the idling time should be appropriately extended for a few minutes.
After the diesel engine is started, it is necessary to observe whether the oil pressure is normal and whether there are abnormal phenomena such as oil leakage and water leakage. If there is no abnormal phenomenon, increase the speed of the diesel engine to the rated speed of 1500 rpm. At this time, the generator shows a frequency of 50HZ and a voltage of 400V, and the output air switch can be closed and put into use.
 The generator set is not allowed to run without load for a long time. (Because long-term no-load operation will make the diesel fuel injected from the fuel injector of the diesel engine unable to be completely burned, resulting in carbon deposition, resulting in air leakage of the valve and piston ring.) If it is an automatic generator set, it does not need to run at idle speed, because the automatic generator set generally Equipped with a water heater, the diesel engine block is always kept at about 45°C, and the diesel engine can be powered normally within 8-15 seconds after it is started.
3. Pay attention to observe the working status in operation
Diesel generator sets must have special personnel on duty during work, and often pay attention to observe a series of possible failures, especially the changes in oil pressure, water temperature, oil temperature, voltage, frequency and other important factors. In addition, pay attention to having enough diesel oil. If the fuel is interrupted during operation, it will objectively cause a load stop, which may cause damage to the generator excitation control system and related components.
4. It is strictly forbidden to stop with load
Before each shutdown, the load must be gradually cut off, then the output air switch of the generator set should be turned off, and finally the diesel engine should be decelerated to an idle state and run for about 3-5 minutes before shutdown.