Basic commissioning steps of diesel generator sets

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Summary. Hello, the no-load running time of the pro-diesel generator set can generally not exceed 5 minutes. Generally, the engine heats up in 3 minutes, and then the speed is increased to the rated speed, and the voltage is stable to be loaded.

The generator set should run at least 30% of the load to ensure that the engine reaches the working temperature required for normal operation, so that the matching clearance can be optimal, avoid burning engine oil, reduce carbon deposition, eliminate the early wear of the cylinder liner, and prolong the service life of the engine.

After the diesel generator is successfully started, the no-load voltage is 400V, the frequency is 50Hz, and the three-phase voltage balance has no big deviation. If the voltage deviates too much from 400V, and the frequency is lower than 47Hz or higher than 52Hz, the diesel generator should be inspected and repaired before the load can be operated; The coolant in the radiator should be in a saturated state, the temperature of the coolant above 60 degrees Celsius can be closed with load, and the operating load should be slowly increased from the small load to operate regularly.

What is the specification for the commissioning and operation time of diesel generators.

Hello, the no-load running time of the pro-diesel generator set can generally not exceed 5 minutes. Generally, the engine heats up in 3 minutes, and then the speed is increased to the rated speed, and the voltage is stable to be loaded. The generator set should be at least 30% of the load to ensure that the engine reaches the temperature required for normal operation, so that the clearance of each fit can reach the best, Ludan to avoid burning oil, reduce carbon deposition, eliminate the early wear of the cylinder liner, and prolong the service life of the engine.

After the diesel generator is successfully started, the no-load voltage is 400V, the frequency is 50Hz, and the three-phase voltage balance has no big deviation. If the voltage deviates too much from 400V, and the frequency is lower than 47Hz or higher than 52Hz, the diesel generator should be inspected and repaired before it can be dismantled and disrupted to run the load; The coolant in the radiator should be in a saturated state, the temperature of the coolant above 60 degrees Celsius can be closed with load, and the operating load should be slowly increased from the small load to operate regularly.

Newly bought diesel generator set.

Hello, whether it is a large diesel generator or a small diesel generator, you need to check and prepare for the heat engine before use, and then you can start using it in a bent state, the starting time of the diesel generator is normally between 5s-50s, if it is within this time period, it can work normally after starting, then the following diesel generator set rental manufacturers will take you to understand the diesel generator starting time in detail: After the diesel engine of the ordinary generator set starts, it will go through 3-5 minutes of idle operation (about 700 rpm), and the idle time of winter will 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, and stop the engine for maintenance immediately if any abnormalities are found.

If there is no abnormal phenomenon, the speed of the diesel engine is increased to the rated speed of 1500 rpm, and the generator display frequency is 50Hz and the voltage is 400V, and the output air switch can be closed and put into use. The generator set is not allowed to disturb the grinding room for a long time. If it is an automatic generator set, there is no need to idle running, because the automatic unit is generally equipped with a water heater, so that the diesel engine cylinder block is always kept at about 45, and the diesel generator can be powered normally within 8-15 seconds after starting.

--- Huali Electromechanical, one of the top ten generator set enterprises, reminds you that the commissioning of diesel generator sets is mainly to check and adjust the fuel supply system of diesel generator sets, such as fuel pump, fuel injection pump, governor, fuel supply and valve clearance of valve mechanism.

The steps for checking and commissioning the generator are as follows:

1.Measurement of insulation resistance. The measurement of the insulation resistance of the generator can determine the insulation state of all live parts to the casing. The generator is in the cold state without any external leads for measurement checks.

2.Measurement of winding resistance. The resistance of the generator winding is not only related to the loss of the generator, but also has an impact on the characteristic parameters such as the excitation voltage and short-circuit current of the generator.

The size of the DC resistance of the winding is related to the wire specification and winding type. There are many ways to measure the DC resistance of a wire, and the bridge measurement method is usually used, which is both accurate and simple.

3.Generator heat test inspection. The self-excited alternator relies on the remanent excitation to establish the voltage, and the remanence voltage is higher for the brushless excitation generator.

When the excitation circuit is short-circuited, there is still a certain output voltage. The newly assembled new generator has no remanence, so the stator windings of the exciter should be magnetized with direct current before starting. Generators that have been shelved for a long time also need to be magnetized before they can be self-excited before they can be reused.

Diesel generator generator heat test inspection, the method after the unit is turned on, keep the output voltage, power unchanged, constant current, stable operation of the unit, record the ambient temperature and bearing temperature every 0·5h, and test the armature current, armature voltage, excitation current of the exciter, excitation voltage, frequency and temperature of each point. The test inspection is carried out for LH, and if the excitation voltage and temperature do not exceed the specified value, it is considered to be qualified.

4.Adjustment of the excitation device.

5.Adjustment of the differential adjustment device.

6.Inspection of air filters.

7.Inspection of anti-condensation heaters.

Commissioning of the control panel: After the installation of the diesel generator set, the electrical part of the control system should be inspected and debugged before it can be put into operation.

1) Check the switches, the position of the knife switch is correct, and the interlock switch meets the requirements of the operation mode.

2) Check that the fuses are installed well and the power supply is normal.

3) Check that the voltage of the 24V battery is normal and the charger is running normally.

4) There is no oil leakage in the Yuchai generator set, the oil level of the diesel generator tank is normal, and the oil valve is open.

5) The outlet control switch of the diesel generator shall not be operated manually under any circumstances.

6) After each start and stop of the diesel generator, the self-start screen return button will be reset once.

7) During the operation of the diesel generator, someone monitors the operation of the diesel generator on site and meets the specified requirements.

8) When the 400V factory bus loses power, if the diesel generator does not start itself, it is allowed to start manually once, but the starting time of each time shall not exceed 15 seconds.

9) After the 400V factory bus loses power and the diesel generator starts normally, if the power switch from the diesel generator to the security section is not closed, it should be snapped once after confirming that the working power supply is opened.

10) Diesel generator fire extinguishing equipment should be complete.

Diesel generator set operation and grid-connected operation regulations.

Yanan A: R&D and production of diesel generator sets and fuel cells) 1. Automatic status of diesel generator sets.

1. Keep the battery pack that starts the diesel generator set with electricity and reaches the starting voltage.

2. Keep the cooling water level of the radiator normal, and the circulating water valve is always open.

3. The oil level of the crankcase should be kept within the range of 2cm of the dipstick engraving line.

4. The oil volume of the fuel tank is more than half, and the fuel supply valve is always open.