What are the inspection requirements and precautions for diesel generator sets?

1. The rated voltage of the diesel generator must be consistent with the voltage level of the external power line.

2. The stationary diesel generator set should be installed indoors on the basis of compliance with the regulations, and should be higher than the indoor ground mobile diesel generator set should be in a horizontal state, placed firmly, its trailer should be reliably grounded, and the front and rear wheels should be stuck. Outdoor diesel generator sets should be equipped with protective sheds.

3. The setting of diesel generator sets and their control, power distribution, repair rooms, etc. should ensure the electrical safety distance and meet the fire protection requirements; The smoke exhaust pipe should extend outdoor, and it is strictly forbidden to store oil storage drums indoors and near the smoke exhaust pipe.

4. The installation environment of the diesel generator set should be close to the load center, convenient access to and out lines, smooth surrounding roads, and avoid the downwind side of the pollution source and the place that is easy to accumulate water.

5. The power supply of the generator set must be interlocked with the power supply of the external power line, and it is strictly forbidden to run in parallel with the external power line; When two or more generator sets run in parallel, a synchronization device must be installed, and the power supply to the load should be supplied after the unit is synchronized.

Inspection and management of diesel generator sets.

Pre-boot check:

1 Check whether the oil level of the oil scale is between L and H to see if there are any signs of abnormality in the quality of the oil.

2. Check whether the cooling water in the water tank is enough, whether the water valve is open, and whether the cooling water has any abnormal signs.

3 Check the tension of the water pump belt, fan belt, charger belt.

4 Check whether there is any debris between the fan and the cooling sheet of the water tank, and remove it if so.

5. Check whether there is any debris stacked on the unit, and remove it if there is any.

6. Check whether the generator set has oil leakage and water leakage.

7. Check whether the battery connector is loose and oxidized.

8. Look at the unit operating parameter record card to compare whether the various filters and oil have been used beyond the expiration date.

Check after powering on:

1. Pay attention to whether the generator set has abnormal sound, and stop the machine immediately if there is.

2 Check the oil pressure gauge, under normal circumstances, the oil pressure should not be lower than 35psi

3. Check whether the frequency and voltage value of the generator are stable and the working condition of the charger.

4. The above three conditions are normal, and the no-load heat engine will run with load after 10 minutes.

5. Avoid running for a long time under the working condition of more than 80% of the rated load.

6. Listen to the abnormal sound of the diesel engine under the working condition with load, check the oil pressure, water temperature (below 90 degrees Celsius), frequency, voltage, and smoke color.

7. Check whether the generator set has oil leakage, water leakage, air leakage and abnormal vibration of the unit.

8. Check whether there is any abnormality in the temperature of the electric ball shell.

Stoppage. 1. After unloading, the diesel engine will run no-load for 10 minutes and then shut down, so that the electric ball and the lubricating parts of the diesel engine can be fully cooled.

2. Check whether there is oil leakage or water leakage in the unit after shutdown, and if it is necessary to check, let the cooling water cool down 2 hours after shutdown before discharging the cooling water.

The first step of starting operation, as the saying goes, a new start is half the success, doing a good job in the operation of diesel generator sets is also an important step to ensure the normal operation of all equipment, diesel generator sets should do a good job in the following aspects of testing operations before operation, in order to ensure the normal operation of the equipment, let's take a look with Yangzhou Fukangsi.

1. Check whether the lubricating oil level of the diesel generator is normal.

2. Check whether the coolant water volume of the diesel generator is normal.

3. Check whether everything is normal when the diesel generator is preheated in advance.

4. There is no oil leakage and water leakage in the unit, there is no debris in the machine, and there is no debris in the exhaust port.

5. The inside and outside of the dashboard are clean, there is no debris, the electrical circuit is normal and there is no alarm on the control panel.

6. Detect that all power switch parts correctly meet the operation requirements, detect whether the "emergency stop" button on the local dashboard of the diesel generator is correct, and detect that the power switch at the entrance and exit of the diesel generator is interrupted.

The above aspects are also the operations that everyone should do before the operation of the diesel generator set, and any one of them is very important, and you can't be careless. In its position, doing a good job in those inspection operations can ensure the normal operation of the equipment, reduce the occurrence of common faults in the work, and make your work more efficient.

1. Carefully inspect the inside of the generator, there should be no debris to prevent foreign objects such as screws, tools, and rags from falling in.

2 Remove dust from all parts of the generator with dry compressed air or skin tiger at about two atmospheres. To avoid damage to the coil, metal blowpipes must not be used.

3.Check the lubrication of diesel generator bearings. The quality and quantity of lubricants and greases must comply with the requirements for maintenance.

4 Check whether the connection between the generator and its prime mover is good. At the same time, check whether the axes of the two machines are on the same straight line.

5. Check whether the rotor is flexible and check the quality of the bearing.

6.Clean the collector ring.

7. Check the brush device;

8 Measure the insulation resistance.

9 If the generator structure allows, the air gap can be measured with a feeler gauge.

10 Check whether the excitation wiring is correct and whether the lead wire is good.

11. Check the fasteners, and tighten them if they are loose.

1) The operating sound and vibration of the unit are normal;

2) The outlet voltage, current, frequency, active power, reactive power, excitation voltage and excitation current of the generator do not exceed the rated value;

3) The temperature of the engine, the temperature of each bearing, the temperature of the lubricating oil and the temperature of the cooling water are normal;

4) The oil level of the fuel tank and the water level of the cooling water are not low;

5) The oil pressure is not low;

6) No peculiar smell, abnormal alarm.

Voltage, current, frequency, temperature, running time.

1) The operating sound and vibration of the unit are normal;

2) The outlet voltage, current, frequency, active power, reactive power, excitation voltage and excitation current of the generator do not exceed the rated value;

3) The temperature of the engine, the temperature of each bearing, the temperature of the lubricating oil and the temperature of the cooling water are normal;

4) The oil level of the fuel tank and the water level of the cooling water are not low;

5) The oil pressure is not low;

6) No peculiar smell, abnormal alarm.

1.Preparation before starting. Before starting the engine every time, it is necessary to check whether the cooling water or antifreeze in the diesel engine water tank is satisfied, if it is missing, it must be filled.

Pull out the oil ruler to see if the lubricating oil is missing, if it is missing, it should be added to the specified "static full" scale mark, and then carefully check whether the relevant components have hidden faults, and if the fault is found, it should be eliminated in time before starting.

2.It is strictly forbidden to start the diesel engine with load. Before starting the diesel engine, it should be noted that the output air switch of the generator must be turned off.

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 temperature is low in winter, and the idle operation time should be appropriately extended for a few minutes. After the diesel engine starts, it is necessary to observe whether the oil pressure is normal and whether there is abnormal phenomena such as oil leakage and water leakage, (under normal circumstances, the oil pressure must be above) If any abnormality is found, it should be stopped immediately for maintenance. 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 run no-load for a long time. (Because long-term no-load operation will make the diesel fuel injected by the diesel engine injector unable to burn completely, resulting in carbon deposits, resulting in valve and piston ring leakage.) If it is an automatic generator set, it does not need to run at idle speed, because the automatic unit is generally equipped with a water heater, so that the diesel engine cylinder block is always kept at about 45co, and the diesel engine can be powered normally within 8-15 seconds after starting.

3.Pay attention to the status of the work in operation. In the work of the generator set, there should be a special person on duty, and often pay attention to a series of faults that may occur, especially pay attention to the changes in important factors such as oil pressure, water temperature, oil temperature, voltage, frequency, etc.

In addition, it should be noted that there is enough diesel, such as fuel interruption during operation, which objectively causes load shutdown, which may lead to damage to the generator excitation control system and related components.

4.It is strictly forbidden to stop the machine with load. Before each shutdown, the load must be cut off gradually, then the output air switch of the generator set must be turned off, and finally the diesel engine must be slowed down to idle for about 3-5 minutes before stopping.

First, first of all, the unit should be visually inspected: whether the engine is damaged, missing parts, whether the screws are loose, and whether the generator output line or control line is damaged and loose.

Second, the fuel system should be inspected.

1. Whether the amount of fuel is sufficient, whether there is oil leakage or loose pipe fittings (etc.) in the wiring and piping, and whether the air in the fuel system is excluded.

2. Lubrication system: Is the engine lubricating oil sufficient? New engines or engines reinstalled after an overhaul must perform the following maintenance for the first 50 hours of initial operation

1) Engine lubricating oil replacement.

2) Engine oil filter replacement.

3) Engine diesel filter replacement.

4) Check and adjust the valve clearance.

5) Inspection of the external screws of the engine.

3. Cooling system: Is the amount of water used to cool the radiator sufficient? Add rust inhibitors.

4. Battery: Is the electrolyte of the battery at the normal liquid level? Is the voltage correct? Is the joint loose?

5. Is the charger working normally?

6. Exhaust system: whether the silencer is damaged and whether the exhaust pipe is firmly installed.

7. Whether the ventilation of the generator room is good.

8. No flammable materials and sundries shall be stored around the unit.

1. Check all the terminal bolts again; Use the insulation resistance meter to test the insulation resistance of the feed line from the generator to the distribution cabinet and the insulation resistance between phases and relative ground, and the insulation resistance value must be greater than 0 5mfl. The DC withstand voltage test of the feed line of 1kV and above is 2 4kV, the time is 15min, the leakage current is stable, and there is no breakdown. (FYI:.)

Fujian Yanan Motor A).

2. Use the starting device of the unit to manually start the diesel generator without load for 1h to check whether the steering and mechanical rotation of the unit are abnormal, whether the oil supply and oil pressure are normal, whether the cooling water temperature is too high, and whether the automatic and manual control of the speed meet the requirements; If a problem is found, solve it in a timely manner.

3. After the diesel generator is qualified for no-load test, the 2H no-load test will be carried out to check the temperature rise of the fuselage and bearings; Only if the unit no-load test is qualified, the load test can be carried out.

4. Detect the cooling water and oil heating system of the automatic unit, turn on the power supply, if the water temperature is lower than 15, the heater should start automatic heating, and when the temperature reaches 30, the heater should automatically stop heating. The requirements for the oil heater are the same as those for the cooling water heater.

5. Test the protection performance of the unit. The instrument is used to send out signals such as low oil pressure, high cooling water temperature, overvoltage, phase loss, overload, short circuit, etc., and the unit should immediately start the protection function and give an alarm.

6. Detect the automatic replenishment device. The hand automatic switch of the device is switched to the automatic position, and the water and oil are artificially discharged to a low liquid level, and the system is automatically replenished; When the liquid level rises to a high level, the replenishment should be automatically stopped.

7. The phase sequence table is used to verify the phase of the mains power supply and the generator power supply, and the phase sequence should be consistent. Linkage debugging with mains. Artificially cut off the mains power supply, the main unit should be able to automatically start and supply power to the load within the time required by the design; If the main unit is shut down due to a fault, the standby unit should be able to automatically start supplying power to the load.

When the power supply is restored, the standby unit will automatically shut down. Finally, the static test and operation test of the generator set must be regulated.

The factors that should be considered in the selection of diesel generator sets mainly include mechanical and electrical performance, the purpose of the unit, the capacity and variation range of the load, and the automation function.

1. The purpose of the unit. Because the diesel generator set can be used in 3 situations, such as common, standby and emergency. Therefore, the requirements for diesel generator sets are different for different uses.

2. Load capacity. The load capacity and load change range should be selected according to different uses, and the single capacity of the diesel generator unit and the standby diesel generator set capacity should be determined.

3. The use of the environmental conditions of the unit (mainly refers to the altitude and climatic conditions) and what configuration the unit needs.

Then the choice of the unit manufacturer must choose the regular manufacturer: to ensure the quality and after-sales of the unit

1. Inspect the scale, corporate culture, accessories, etc. of the manufacturer, select the most satisfactory manufacturer, and ensure the quality and after-sales of the unit!

2. Choose the OEM factory of a well-known diesel engine manufacturer. Inspect the manufacturer's after-sales service, accessories, etc.!

3. The "three certificates" including production license, product qualification certificate and trademark registration certificate should be complete.