Startup Steps And Precautions Of Diesel Generator

Jan. 23, 2022

Dingbo introduces Start-up Steps and precautions of diesel generators.

First, the preparation of diesel generator before starting

The diesel generator must check whether the cooling water or antifreeze in the diesel engine water tank is satisfied before starting each time, and fill it up if lacking. Pull out the oil ruler to check whether the lubricating oil is missing. If the lubricating oil is missing, it should be added to the specified "static full" scale line, and then carefully check the relevant parts with no hidden trouble. If the fault is found, it can be started up in time.

It is strictly forbidden to start the diesel generator with load

Before starting the diesel generator, note that the output air switch of the generator must be closed. Ordinary generator set diesel engine after starting after 3-5 minutes of idle operation (700 RPM or so) low temperature in winter, idle operation time to be appropriately extended for a few minutes. After starting the diesel engine, the first thing to observe is whether the oil pressure is normal and whether there is oil leakage, water leakage and other abnormal phenomena, (under normal circumstances, the oil pressure must be above 0.2mpa) if found abnormal to immediately stop maintenance. If there is no abnormal phenomenon, the diesel engine speed is raised to the rated speed of 1500 RPM, and the generator display frequency is 50HZ and the voltage is 400V, then the output air switch can be closed and put into use. The generator set is not allowed to run empty for a long time. (Because a long time of no-load operation will make the diesel engine nozzle out of the diesel fuel can not fully combustion lead to carbon accumulation, resulting in valve, piston ring leakage.) If it is an automatic generator set, there is no need to idle, because the automatic set is generally equipped with a water heater, so that the diesel engine cylinder block is always kept at about 45℃, the diesel engine can be started in 8-15 seconds of normal power transmission.


Startup Steps And Precautions Of Diesel Generator

Three, pay attention to observe the working state of the diesel generator set in operation

Diesel generator in the work, there should be a special person on duty, often pay attention to observe a series of possible failures, especially to pay attention to oil pressure, water temperature, oil temperature, voltage, frequency and other important factors change. In addition, it should be noted that there is enough diesel fuel. If fuel is interrupted during operation, it will objectively cause load shutdown, which may lead to damage of generator excitation control system and related components.

It is strictly prohibited to stop diesel generator set with load

Before each shutdown, the load must be cut off gradually, and then the output air switch of the generator set must be closed, and the diesel engine will be slowed down to idle for about 3-5 minutes and then stopped.

Five, diesel generator set safety operation rules:

(1) For generators powered by diesel engines, the operation of the engine part shall be carried out in accordance with the relevant regulations of internal combustion engines.

(2) Before starting the generator, it is necessary to carefully check whether the wiring of each part is correct, whether the connecting part is firm, whether the brush is normal, whether the pressure meets the requirements, and whether the grounding wire is good.

(3) Put the resistance value of the excitation rheostat in a large position before starting the diesel generator, disconnect the output switch, and the generator set with clutch should disengage the clutch. Start the diesel engine at no load first, and then start the generator after running smoothly.

(4) After the diesel generator starts running, it should pay attention to the mechanical noise and abnormal vibration at any time. After confirming that the situation is normal, adjust the generator to the rated speed, the voltage to the rated value, and then close the output switch, to the external power supply. The load should be gradually increased, and strive for three-phase balance.

(5) The parallel operation of diesel generators must meet the same frequency, same voltage, same phase and same phase sequence.

(6) The diesel generators for parallel operation must be in normal and stable operation.

(7) After receiving the signal of "ready for parallel connection", adjust the speed of the diesel engine and close it instantly at the same time according to the whole device.

(8) Diesel generators running in parallel should reasonably adjust the load and evenly distribute the active power and reactive power of each generator. Active power is regulated by diesel engine throttle and reactive power by excitation.

(9) The diesel generator in operation should pay close attention to the engine sound and observe whether the indicator of various instruments is within the normal range. Check whether the running part is normal and whether the temperature rise of diesel generator is too high. And make operational records.

(10) When the diesel generator stops, load is reduced first, the excitation rheostat is restored, the voltage is reduced to a small value, and then the switch is cut off in sequence to stop the operation of the diesel engine.

(11) If a diesel generator in parallel operation needs to be stopped due to load drop, it should first transfer all the load of the generator to be stopped to the generator that continues to operate, and then stop the generator according to the method of stopping a single generator. If all the shutdown is required, the load will be cut off first, and then a single generator will be shut down.

(12) Mobile diesel generator, the bottom frame must be parked on a stable basis before use, not allowed to move when running.

(13) When the diesel generator is running, it should be considered to have voltage even if it is not excited. Do not work on a rotating generator lead line and touch the rotor or clean it. The generator in operation shall not be covered with canvas and other materials. 14. After maintenance, the diesel generator must carefully check whether there are tools, materials and other sundries between the rotor and stator slots, so as not to damage the generator during operation

 

 


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