Causes of problems of MTU diesel generator and related points

Detail the cause of the diesel generator problems and related points, with the development of science and technology, people on the quality of science and technology products and the performance of science and technology products more and more high requirements. Diesel generator is a kind of excellent performance, good quality generator. It can not only provide electricity for life well, it can also provide power resources for equipment in some special equipment. The following is a detailed explanation of the causes of diesel generator problems and relevant points.

Do you encounter the following situations in the process of using diesel generators, that is, undervoltage fault alarm stop, which is related to what factors?

1) The generator regulator plate is faulty

May be due to changes in environmental factors, R regulator parameters are no longer applicable, need to be re-adjusted, generally speaking, the non-parallel diesel units basically will not appear this problem, because the regulator parameters are fixed (400V), in general, we can not adjust, only used for parallel units may appear this problem, Because the R regulator is adjusted according to the main bus voltage when the machine is combined, it is not static.

At this time, the parallel device generally has a voltage regulator signal into the R regulator board, in this case, either check whether the voltage regulator signal is connected to the wrong, or try to quickly use electronic controls (parallel device, regulator board, etc.) at the start of the voltage reset.

2) Diesel generator speed regulation problem

Diesel engine speed regulation is divided into electronic governor and mechanical speed regulation, if it is mechanical speed regulation, then on the diesel engine there is a control of oil and oil pump mechanism, it seems to be called common rail oil pump (specific name forget), there is a pull rod, is to control the amount of oil, let's call it speed control rod, speed control rod on both sides of the distribution of a speed limit (high speed) rod and speed control rod, Boot running 20S that low voltage, do not know the voltage and frequency is not always up.

If it is always up, it may be caused by the speed is not up, you can adjust the speed of the top rod try, as long as the diesel unit failure, there is generally a main fault, the main fault is solved, resulting in a series of secondary failures to solve.

3) Ground fault

Dongguan generator if out of the three-phase grounding, then the voltage and current is very low, this time to check the main ground discharge device (such as the ground knife) is not closed or grounded.

The role of varistor is: the occurrence of overvoltage fault when the varistor is switched on to step-down, if the varistor is broken down or switched on for other reasons, then it is conceivable that the voltage must be very low, the rectifier bridge has 6 diodes, set DC power supply to supply regulator and excitation devices, if the rectifier bridge diode damage, regulator plate and excitation devices will be greatly reduced

As we all know, diesel generator sets have certain requirements for operation environment, including temperature, altitude, humidity and so on. Among them, the generator set is damp, we can restore normal use by drying; There are also specially designed diesel generators for use at different altitudes; When the temperature is too high, we can also use both external cooling and the cooling system of the generator set, but there is another detail in the temperature that is worth noting, and that is the thermal offset of the voltage.

When the ambient temperature and the temperature of the generator set rise, the permeability of the core of the generator decreases, the DC resistance of the winding increases, and the parameters of the circuit components will change, thus causing the change of the output voltage of the generator set. This phenomenon is called voltage thermal migration. Generally, the voltage thermal offset of the unit is indicated by the percentage of the rated voltage variation caused by the temperature rise, which is generally not allowed to exceed 2%.

Jiangsu Meao Power Technology Co., Ltd. is an important manufacturer of diesel generators. The company mainly manufactures and sells diesel generator sets with power of 3-3000kW, mobile power station of 24-600kW, Marine emergency diesel generator set of 24-800kW, gas generator set, heavy oil generator set and all kinds of imported series, special series (trailer, static speaker, mobile lighthouse, container, etc.) diesel generator At the same time, we are engaged in generator set maintenance and after-sale service of generator set accessories.