There are many classification methods for generator sets, which can be classified into high, medium, and low-speed units based on the rated speed of the engine; According to the rated power output of the unit, it can be divided into large, medium, and small units; According to the output voltage frequency of the generator set, it can be divided into AC generator set (intermediate frequency 400Hz, power frequency 50Hz) and DC generator set. When the voltage frequency is 50Hz, the calibration voltage of small and medium-sized generators is generally 400V (three-phase) or 230V (single-phase), and the calibration voltage of large generators is generally 6.3-10.5k/V. However, the more commonly used classification method is based on the type of fuel used in the internal combustion generator set, control mode, purpose, and appearance structure. (1) Classified by fuel type ① The rated output power of gasoline generator sets is generally relatively small, usually between 0.5 and 12kw; Most of its engines use single cylinder, air-cooled gasoline engines; The output voltage is mostly single-phase 220V, with a frequency of 50Hz; In a few special places, multi cylinder, water-cooled engines with intermediate frequency (400Hz) and two-phase (380V) outputs are also used; Gasoline generator sets have a series of advantages such as small size, light weight, relatively low noise, low price, and easy mobility. They are mainly used in general situations where the load power is small and temporary emergency power supply is required (such as independent storefronts facing the street, emergency lighting for temporary power outages on small construction sites, and night lighting for lack of electricity users). When the user's load power is greater than 6kw, it is recommended to prioritize the selection of corresponding models of diesel generator sets to increase the reliability of the power supply system. ② The production cost of diesel generator sets is higher than that of gasoline generator sets of the same power level, but their working stability is better than that of gasoline generator sets, so the application field of diesel generator sets is much wider than that of gasoline generator sets. The output power of diesel generator sets varies from 1kw to thousands of kilowatts, and the output voltage is mostly single-phase 220V/50Hz or three-phase 380v/50Hz. There are also a few high-power, high-voltage, grid connected diesel generator sets. Diesel generator sets are widely used in various fields such as industry, agriculture, and national defense, and have been widely recognized by users. (2) Classified by control method ① Manual units are the most common type of units, which have automatic voltage and speed adjustment functions. Operators can start, close, open, and stop the units on site in the machine room. This type of unit is usually used as a main or backup power source. ② The self starting unit is an automatic control system added to the manual unit. When the ...

WINDING PROTECTION IS A KEY ISSUE WHEN USING GENERATOR SETS Generator system： •Anti-condensation space heaters • Coastal Insulation protection Alternators are of course affected by this issue, essentially due to their electromechanical nature, since they contain numerous components that can fail prematurely. In addition to the mechanical risk there is the risk of electrical malfunction. The primary purpose ofgenerator setsis to provide electric current quickly and autonomously, in situations and places where the main supply has failed. As a result, they are often faced with conditions of use that do not provide an optimum environment. Extreme temperatures, humidity, dust, etc. All these aggressors are likely to speed up ageing of the genset and its different components. Resistance to the weather and demanding conditions of use is therefore essential to ensure the longevity of a generator set. In practice, we can see that for low-voltage machines excluding AVRs, the main sources of breakdown are divided evenly between the different alternator components.  DEMANDING ENVIRONMENTS Environmental stress is usually classified according to four criteria: •Humidity is a problem because it is an electrical conductor. It is therefore likely to encourage the development of potential short-circuits. Moreover, moisture tends to accumulate in the bottom of the machine, where it mixes with dust and does even more damage to the windings   Dust and other particlesconstitute another hazard, as they cause mechanical abrasion of the varnish, which will gradually lead to a deterioration in its performance. Since air circulation is used for cooling inside the alternator, the presence of particles in the environment is particularly harmful   Corrosion, especially rust due to a saline environment, is usually a factor in the premature ageing of mechanical parts and windings. Alternators used in coastal areas or in an unprotected marine environment are particularly exposed to this risk. Corrosion can also cause the build-up of deposits that may interfere with machine operation.   •In certain cases or for certain applications, generator sets can be used in environments saturated inchemicals which pose a particularly high level of attack (acids, bases, alkali). Although this rarely happens, these situations must also be taken into account   APPLICATIONS CONCERNED Although it’s difficult to generalise, we can nonetheless draw up guidelines relating to the correlation between the application for which an alternator is used, its environment and hence the required protection level. The table below summarises these considerations.   (*) Possible derating according to voltage and alternator models for TAL range (refer to catalogue). (**) Depending on the production site, the fibreglass enamelled wire solution may be replaced by another process, for example, double application of ins...

Under non-rated on-site conditions and special loads, the rated power of Cummins generator sets needs to be corrected. Dongfeng Cummins generator set price,  Xiamen ZTA Power tells what the correction methods are:   1 Power correction of ambient temperature   When the ambient temperature is too high, the air density decreases, the amount of oxygen during diesel engine combustion decreases, and the combustion efficiency decreases, thereby reducing the mechanical output power of the diesel engine; at the same time, the generator needs cold air to cool the winding when it is working. When the ambient temperature is too high, the cooling effect is reduced, and the internal temperature of the generator winding increases. In order to ensure that the winding temperature of the generator is within the allowable range, the output power of the generator must also be reduced.   The output power of diesel engines and generators of various brands is affected by the ambient temperature. Due to different designs, the correction parameters are also inconsistent; the same brand, different models, and different speed control systems have different correction parameters. Generally, the correction parameters of the original diesel engine manufacturer should be used as the standard. Usually, the power loss can be calculated according to the output power decrease of 3%~4% for every 5℃ increase in ambient temperature above 40℃. However, it should be noted that the nominal power of some manufacturers' units is based on the output power at an ambient temperature of 25℃.   2 Power correction at altitude   When the altitude increases, the air density will also decrease, which also affects the output power of the diesel engine and generator. Different brands of diesel generator sets should refer to the manufacturer's power correction curve to calculate the actual power after capacity reduction. Usually, the power loss of generator set  can be calculated according to the output power decrease of 4%~5% for every 500m increase in altitude when the altitude exceeds 1000m. However, it should be noted that the nominal power of some manufacturers' units is based on the output power at an altitude of 300m. Electronic injection diesel engines use electronic injection control technology, which controls the injection timing and injection amount of each injector through various data of the diesel engine detected by a series of sensors installed on the diesel engine. Since the electronic control unit precisely measures the intake pressure and fuel temperature of the intake manifold and controls the injection timing and injection amount, the electronic injection diesel engine has a lower power drop in high altitude and high temperature environments. Therefore, the use of electronic injection generator set in high altitude and high temperature environments can obtain greater output power and economy. 3 Power correction of nonlinear loads   Nonlinear...