The no load running time of diesel generator set generally cannot be exceeded

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The no-load running time of 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.

No-load shutdown is required for diesel generator sets to maintain and ensure their normal operation for the following reasons:

1. Cooling of the generator set: In the working state, the heat generated by the generator set needs to be dissipated through the cooling system. When the generator set is in the no-load state, the load decreases or disappears, and the heat production of the generator set will be significantly reduced.

Performing a no-load shutdown can give the generator set enough time to cool down, prevent overheating, and thus extend the life of the equipment.

2. Engine maintenance: Regular no-load shutdown can provide a time window for engine overhaul and maintenance. Engines are subject to wear and tear during operation and require parts to be inspected, cleaned and replaced.

No-load shutdown can facilitate maintenance personnel to further inspect and maintain the engine, including changing the oil, cleaning the cylinder, checking the injector, etc., to ensure the normal operation of the engine and extend the service life.

3. Save energy and cost: No-load shutdown can avoid unnecessary fuel consumption of rough limbs. In the absence of load demand, no-load operation wastes fuel resources and increases the geogenetic cost of the operation. By shutting down at no load, energy can be saved and operating costs can be reduced.

The no-load is mainly the preheating of the unit, and the load can be carried after the preheating. This depends on the specific unit.

The no-load is mainly the preheating of the unit, and the load can be carried after the preheating. This depends on the specific unit.

There is not much no-load running time, the temperature goes up, and you bring the load.

It will lead to an increase in the oil consumption of the diesel generator set, the diesel engine is easy to leak oil, charcoal, increase the failure rate, and shorten the overhaul cycle.

From the perspective of output, the fuel does not have the function of regulation, and the generator load is insufficient, the power demand is insufficient, but the combustion system is normal, and the same amount of fuel can only be matched by incomplete combustion in the case of insufficient demand.

If it is not completely burned, the carbon in the fuel will increase, which will be deposited in the system, and the operation will affect the efficiency and function of the system, and even lead to the failure of the system equipment and the valve parts. Therefore, boilers, generators and other equipment that require fuel basically require fuel to be fully combusted, and some will also install some auxiliary equipment on the system to make the fuel fully combusted.

This will lead to an increase in the oil consumption of the diesel generator set, the diesel engine is prone to oil leakage, charcoal, increase the failure rate, and shorten the overhaul cycle.

The diesel generator set is composed of a diesel engine and a synchronous alternator, and the whole diesel generator set is mainly divided into three parts: diesel engine, generator (i.e., electric ball), and controller.

The maximum power allowed for diesel engines is limited by the mechanical and thermal loads of the parts. The diesel engine cannot be used more than the rated power, otherwise it will shorten its service life and may even cause accidents.

1.After the generator set is started, check whether the oil pressure and water temperature display are normal. (The rated oil pressure is 400kpa-700kpa, and the water temperature is 65-85 degrees Celsius).

2.Check the voltage and frequency of the generator to see if the rating is met.

3.Check the unit for irregular noise or vibration.

4.Check whether the smoke exhaust pipe of the generator set is normal.

5.Check whether there is any leakage of three liquids or leakage of smoke exhaust system.

6.The generator room needs to be equipped with a special person on duty to observe the power supply of the diesel generator set and the electricity consumption of the electrical equipment at any time, deal with the problem immediately, and fill in the accident record report.

7.When the generator set is running, the detection work can not be carried out, and the water tank cover can not be opened to check the water level to prevent hot water burns.

8.The amount of load connected to the first step depends on the operating temperature. When the water temperature gauge of the unit indicates that the temperature is lower than 20 degrees Celsius, the load can be increased to 50% of the rated output power at most, and when the diesel generator set is at the normal operating temperature (75-85 degrees Celsius), the load is allowed to be increased to 70-100% of the rated output power.

In order to ensure the long-term normal use of the diesel generator set, it is recommended that the user do not add the load too fast and do not make the unit run beyond the rated power. The one-time starting power of the generator set cannot exceed 50% of the total power of the generator.

9.Attention should be paid to keeping the three output currents of the diesel generator set balanced as much as possible, and the maximum should not exceed 25% of the rated load.

10. It is not allowed to run more than half an hour without load or less than 30% load for a long time, otherwise it is likely to cause oil leakage in the body, and at the same time, the fuel injector will be fouled and blocked.

11. The battery cable of the unit cannot be removed during operation to prevent the thought shutdown and excessive DC voltage and burn out the DC control equipment.