It's hard to imagine modern life without electricity. This also applies to the work of ordinary household appliances in the house, and the functioning of enterprises, factories, clinics. It’s scary to even imagine what would happen if the power went out completely in one city.
Many organizations are trying to save space or move out of town. It is known that outside the city limits, cases of power failures are not uncommon. But usually this does not scare the company, since the problem is very easily and simply solved. Three-phase generators come to the rescue.
Different tasks are solved by different devices. Depending on them, three-phase generators for gasoline or diesel fuel are chosen. These are not the devices on which they save. Devices must be made from a reputable manufacturer to avoid counterfeiting.
Gasoline generators
Gasoline units applyeverywhere. This is the sphere of construction, industry, trade and so on. In short, wherever electrical power is needed.
When buying three-phase generators, you should remember the need to provide loads on different phases. The difference between electrical capacities must also be maintained, which should not exceed twenty-five percent.
Gasoline units have their own single-phase voltage output at 220 V and 50 Hz. This, of course, makes their possibilities even wider. But you need to understand that the power of electrical appliances should not be higher than a third of the output power of the engine. Otherwise, phase imbalance will occur, and the equipment will not start.
In order for modern production to work properly, such equipment must be installed on it.
Diesel generators
To provide electricity to industrial facilities, three-phase diesel-type generators are also used. This device is installed for an autonomous source that provides electricity to industrial facilities operating at full capacity.
Design
The diesel generator functions by converting the rotational energy of the crankshaft into alternating current.
- Pistons start moving from the crankshaft.
- Power is transferred to the rotor through movement.
- As a result, an alternating magnetic field appears in the winding, which is converted into an electric current.
To obtain this result, you need to use the followingmechanisms:
- diesel engine, the quality of which determines the duration of a three-phase power plant - generator manufacturers usually use units of large companies;
- systems for the operation of the motor, including fuel supply, liquid cooling, air supply and others;
- synchronous and asynchronous alternator;
- various automatic devices to control the start and stop of the motor, power and so on;
- frame for carrying out the task of supporting structure.
The three-phase generator circuit is as follows:
When choosing a three-phase electric diesel station, special attention is given to the engine. Best performance will be achieved with turbocharged and air-cooled engines. These engines are not the most expensive, but they must be carefully maintained.
How to choose a three-phase voltage generator
When choosing a suitable unit, you need to pay attention to the quality of individual parts and the level of protection of the device against electric shock.
As for the engine, in this case it is better not to experiment with Chinese motors. It is better to prefer English Cummins, Perkins, German Deutz or our YaMZ or MMZ.
The alternator may have different protection against electric shock. The coefficient is indicated on the label. If there is a fifth category, then there is no possibility of penetration. The fourth means the maximum coefficient,talking about the impossibility of penetration from any angle.
Three-phase current generator can be made in different ways. These types are used depending on weather conditions and operating conditions.
When choosing a three-phase generator, pay attention to the manufacturer. To make the right choice, of course, you need to consult with experts so that they select a model that satisfies all the needs in electricity.
Power calculation
It will be very problematic to calculate the power yourself correctly. Before choosing a suitable device, consider:
- active load, that is, the coefficient of all needs for stable operation;
- reactive load, i.e. autostart should provide a third more power than in standard mode.
Pros and cons of diesel installations
Diesel three-phase generators have the following advantages:
- they are cheap to run, unlike petrol options, and unpretentious;
- you can choose production capacity, compensating for the lack of voltage even when the equipment is running;
- both three-phase and single-phase devices can be connected to the device.
The downside is sometimes called the high cost of installation. However, taking into account the savings in maintenance, in the end, working on diesel fuel may turn out to be cheaper than on gasoline.
Three-phase or single-phase
Electric generators can be single-phase (at 220 V) and three-phase (at 380 V). If there are no three-phase consumers, then, of course, it is worth purchasing the first option. Otherwise, buy a three-phase voltage generator. It can supply both 220V and 380V, while single phase is only capable of 220V.
In the case of purchasing a three-phase generator, on which single-phase consumers will also be connected, the following should be considered:
- the load should be evenly distributed between the phases;
- power should not differ in phases by more than twenty-five percent, so that there is no phase imbalance;
- a single-phase consumer should have a load of no more than a third of the power of a three-phase unit, that is, if a three-phase station has six kilowatts, then a two-kilowatt device can be connected to it;
- should not be allowed to short from two or more phases.
Synchronous three-phase generator get:
- to provide energy to three-phase consumers;
- power increase;
- reducing the cross section of input cables.
These versatile, multi-duty appliances require responsible maintenance.
Diesel units are purchased most for such industrial facilities, where it is necessary to ensure stable operation in tough operation and to achieve high productivity. They have excellent energy efficiency and meet the required standards.quality.
Let's consider separate models of three-phase generators.
Gasoline unit UGB-10000ET
The device is often purchased during construction work, in production workshops and on farms. It is perfect as a backup power source if electricity is cut off in the central networks.
UGB-10000ET has a four-stroke two-cylinder engine equipped with air cooling. Such an engine has low fuel consumption, low noise and vibration levels, as well as a long service life.
Long service life of the unit is guaranteed by a large section copper winding (copper itself is a high quality smelted product).
Twenty-five liters of fuel is enough here to run a generator for five hours. The price of such a device ranges from 156 to 185 thousand rubles.
Diesel unit UGD-10000ET
Other domestic diesel generator is also suitable for various commercial purposes.
The peculiarity of a diesel engine is that it loves a constant load. Therefore, such a unit is purchased more for permanent operation, if there is no central electricity or it works with significant interruptions.
This is also a four-stroke, two-cylinder, air-cooled, direct-injection unit. Also, the device is characterized by automatic decompression, combined lubrication and a manual pump. All this makes the device extremely reliable, which can be used in the most difficultconditions.
The fuel tank has a capacity of thirty liters and can provide ten hours of operation.
The unit weighs one hundred and seventy kilograms without fuel, so it is mainly used in stationary conditions, although this generator can also be easily moved. Its price is slightly higher: from 193 to 237 thousand rubles.
