What preparations need to be made before the operation of the 500kw diesel generator set

There are many things to pay attention to when choosing to sell diesel generators. More and more comprehensive information in this area can actually be found in Beijing Borui Chenxiang Technology****. Beijing Borui Chenxiang Technology Co., Ltd. is a company specializing in the authorized sales of imported gasoline generator sets

Generators, Japan Sawafuji diesel gasoline generators, etc., the company in addition to a strong sales team for many years, there is a professional technical service team, to provide customers with comprehensive and timely pre-sales and after-sales service, the company's engineering and technical personnel are through the company's professional training, with a variety of technical service experience, and is the first to obtain qualified qualification certificates from the company professionals, services include: to our company all products to provide perfect pre-sales technical advice, program provision, In-warranty and out-of-warranty sales....

Check the diesel generator before operation.

1. Visual inspection:

Whether the exterior of the engine is damaged, missing, whether the screws are loose, whether the generator output line or control line is damaged and loose.

2. Fuel system:

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? The following maintenance must be carried out for the first 50 hours of operation of the engine that has been reinstalled after the overhaul

a. Engine lubricating oil replacement. b. Replace the oil filter. c. Replacement of engine diesel filter. d. Check and adjust the valve clearance. e. Inspection of 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. Do not store flammable materials and sundries around the unit.

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

9. Idlers should not enter the computer room at will.

1. Preparation before the start of the diesel generator.

Before starting the machine every time, it is necessary to check whether the cooling water or antifreeze in the diesel engine water tank is satisfied, and if it is missing, it should 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 on the diesel generator.

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 oil leakage, water leakage and other abnormal phenomena, (under normal circumstances, the oil pressure must be above) if it is found that the abnormality 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 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 engine can be powered normally within 8-15 seconds after starting.

3. Pay attention to the working status of the diesel generator in operation.

In the work of diesel generators, there should be a special person on duty, and often pay attention to observe 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, and frequency. 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.

1) Clean the dust, water traces and rust and other foreign substances attached to the unit, and remove the oil and ash in the air filter;

2) Comprehensively inspect the whole device of the unit, the connection should be tightened, the control mechanism should be flexible, and the crankshaft rotation should be free of car jamming;

3) Check whether the cooling system has been filled with coolant and whether the water pump is filled with suction water. whether there is any leakage or blockage (including gas blockage) in the pipeline;

4) Check the fuel stock of the fuel tank, turn on the fuel switch, loosen the high-pressure oil pump deflation bolt, remove the air in the fuel pipeline, and tighten the deflation bolt;

5) Check whether the oil level is between the two scale marks of the oil scale, and whether the fuel pump and governor have enough oil;

6) Check the reliability and flexibility of the governor lever and the oil pump rack connection, and also check whether there is enough oil;

7) Check whether all electrical circuits (including charging and starting circuits) are connected correctly and in good contact;

8) Check whether there is water leakage and oil leakage in the pipe joints of the diesel engine supply, lubrication, cooling and other systems;

9) All components in the control screen should be complete, clean, no damage and no looseness;

10) Disconnect the silicon rectifier, capacitor, etc., remove the ground wire and use a 500 volt megohmmeter to measure the insulation resistance of the primary line and rotor winding to the ground, which should not be less than 3 trillion ohms, otherwise drying measures should be taken;

11) Check that the wiring from the generator to the switch screen should be correct, and the negative planting should be connected to the control closed key screen through the double-throw switch, which should be isolated from the power grid (air break, should be in the short-circuit position; The U, V, and W ends of the generator correspond to the busbar of the control panel; ）

12) Check whether the position of each switch on the control screen is normal, the main switch should be opened, and the control screen with automatic voltage regulation should be placed in the manual position;

13) The pointer of the meter (except the frequency meter) should point to the zero position.

Check whether the coolant is about 6mm below the water tank cover, not enough to add clean water to the above position.

Check whether the electrolyte level is about 15mm on the polar plate, not enough to add distilled water to the above position.

Check around the generator and remove items that are obstructing operation or operation to ensure good ventilation.

Make sure the diesel generator main switch is off.

Make sure that the fuel tank is more than half full and that the fuel supply valve is always open.

1.In fact, the life of the generator is very long, if we want to do a formal maintenance, there will be a longer service life, for the generator before the operation is also particular, for example, we must first understand that the voltage of the generator is 400V, then the frequency is 50Hz. If there is no difference between the three voltages balanced, it is not possible to deviate too much from 400 volts, nor too much below 50 Hz and not too much above 50 Hz, because only in such a situation can the generator operate normally.

2.In addition, the radiator should also be noted, the radiator must be in a saturated state to cool the temperature above 60 in order to operate, if it does not meet this standard, do not start because this will damage the machine.

3.In addition, the oil also has certain requirements, and it must not be lower than the scale within the specified scale line, and once it is low, it may not be able to operate normally. A filter of the engine is also very important, be sure to pay attention to it from time to time, if it is green, it can be used normally, but if it shows red, you should quickly replace the filter element.

4.Ensure that the diesel generator has a firm and effective grounding, and the cable connection is correct and reliable, and there is no broken skin.

5. The air switch of the generator is free and flexible, and the capacity of the air switch should be close to the current size of the generator and effectively protected.

6.Finally, the simplest and most important part is that there is enough diesel fuel in the diesel generator tank for the generator to run under load.

First, the main inspection work before starting:

1) Measure the voltage value of the starting battery to ensure that its voltage power is sufficient;

2) Check whether the cooling water in the water tank is sufficient;

3) Check whether the oil quantity is between the two scales of the oil scale;

4) Check whether the fuel oil quantity is sufficient;

5) Check whether there is water leakage and oil leakage in the fuel system, cooling system and lubrication system of the unit;

6) Check whether the air filter is blocked, and open the air inlet and outlet ducts;

7) Check whether the unit and environmental sanitation are clean, and ensure that there are no flammable and explosive materials around the unit, and the tools, instruments and spare parts near the machine body should be cleaned up neatly to avoid danger of being involved in the machine.

8) Connect the grounding wire, and ensure that the grounding resistance is 10.

Second, the main inspection work after start-up and during use:

1) Pay attention to listening, seeing, smelling and touching, check whether the unit has abnormal noise or vibration, and take measures in time when problems are found;

2) Check whether the unit has four leakage phenomena such as water leakage, oil leakage, air leakage, and electricity leakage;

3) Inspect every 30 minutes to check whether the parameters of the control screen instrument (such as voltage, current, frequency, water temperature, oil pressure, etc.) are normal;

4) Check fuel consumption and power supply load;

5) Check whether the smoke and exhaust of the unit are smooth and normal;

6) If serious problems are found, they should be stopped immediately, and major failures should be reported to the business department in time.

3. (1) After the oil engine is used, each operating part should be placed in the shutdown (or reset) command position, and the fuel oil switch should be turned off;

2) Close the inlet and outlet air ducts;

Do a good job of cleaning, add engine oil, supplementary fuel oil and cooling water, etc., prepare for the next emergency use, and make use and maintenance records.

1. Many factors affect the size of the generator set. Among them, the characteristics of the electrical load of the system are an important factor. Users must carefully consider the following points before choosing a diesel generator set:

a. Is it used as a common generator set, or a standby generator set.

b. The allowable voltage drop of the system.

c. Consider the increased power consumption of the system in the future.

d. The situation of motor starting.

2. Unit power calibration.

The diesel generator set that is generally supplied to the user is a common unit, which can supply power to the load at rated power for 12 hours continuously (including the ability to run at 110% rated power for 1 hour). When mains failures are less frequent and the power supply is not long, the user can use the generator set whose power is calibrated as a standby unit. It should run at an average of 80% maximum power for no more than 200 hours per year, and for an additional 25 hours per year at 100% maximum power.

3. Problems that need to be paid attention to when matching the rental limb of the generator set with the three-phase motor.

The most commonly used type of motor in mechanical engineering is the three-phase AC induction motor. Due to their starting characteristics, these motors are directly connected to the power supply system. If it is started directly, it will generate an inrush current of up to 6 times the rated current of the motor.

After the soft start device is configured, the starting current is very stable and will not cause an impact on the generator set. When the generator set and the three-phase motor capacity are selected, it is recommended to consider the safety factor, that is, the motor capacity of Beisun Xun (it must be a soft start mode).

Before starting the 400kw diesel generator set, the precautions are as follows:

1. Check that the flywheel and part of the generator protective railing cover should be in good condition. (For reference only: (Fujian Yadong with Kuannan diesel generator set: 4000-080-999) Yaxiaonan will answer for you).

2. The operator should have a clear division of labor, implement supervision, and wear insulated shoes.

3. After sending the signal of "ready" to the staff of the electrical room, carefully check the gearbox, clutch, governor crankshaft control, oil level, and fastening screws of each part to confirm that it is correct, and make sure that the oil and water temperature is not lower than 20 before starting.

4. The pipeline gate of each system should be in the working position.

5. The connecting bolts of the transmission and selling mechanism should be tightened well.

6. Check whether the pressure of the gas cylinder is normal and whether the overspeed safety device is positioned.

7. Put the clutch handle in the starting position and open the blowdown valve of the scavenging pump.