Basic Knowledge of Keeping The Diesel Generator Room Clean 1

In the previous article, we have introduced some basic common sense about diesel generator sets, such as problems like loss of magnetism, power decline, and unstable frequency. Now, let's continue to learn more basic common sense about diesel generator sets. Although it may be a bit boring, it is really necessary to understand these knowledge clearly if you want to have a good grasp of diesel generator sets. I hope this can help everyone understand the basic common sense of diesel generator sets more deeply. Otherwise, it would be a great loss if you spend money in vain.

What are the conditions for two generator sets to operate in parallel? What device is used to complete the paralleling operation?

Answer: The conditions for parallel operation are that the voltage, frequency, and phase of the two generator sets are the same instantaneously. Commonly known as "three simultaneities". A dedicated paralleling device is used to complete the paralleling operation. Generally, it is recommended to use a fully automatic paralleling cabinet. Try not to use manual paralleling. Because the success or failure of manual paralleling depends on human experience. Generally speaking, the reliable success rate of manual paralleling of diesel generators is zero. Therefore, never apply the concept of manual paralleling in the large municipal power supply system to the small power supply system, because the protection levels of the two are completely different.

What is the power factor of a three-phase diesel generator? Can a power compensator be added to improve the power factor?

Answer: The power factor is 0.8. No, because the charging and discharging of capacitors will cause fluctuations in the small power supply and oscillations in the generator set.

Why do we need to tighten all electrical contacts after a diesel generator set has run for 200 hours?

Answer: Diesel generator sets are vibrating equipment. Moreover, for many domestically produced or assembled generator sets, double nuts that should be used are not used, and spring washers that should be used are not used either. Once the electrical fasteners become loose, a large contact resistance will be generated, resulting in abnormal operation of the generator set. In addition, the working components of diesel generator sets will heat up during operation and cool down after shutdown. The resulting thermal expansion and contraction can cause the connection points and lines to become loose.

Why must the diesel generator room be kept clean and the floor be free of floating sand?

Answer: If a diesel engine inhales dirty air, its power will decline; if a generator inhales impurities such as sand grains, it will damage the insulation between the stator and rotor gaps, affect the heat dissipation of the generator coils, and in severe cases, lead to burnout. It will also affect the lifespan of the filter and the heat dissipation effect of the radiator fins of the water tank. Some sundries may even get caught in the fan.

Why is it not recommended that users ground the neutral point during installation?

Answer: (1) The self-regulation function of new-generation generators has been greatly enhanced.

(2) In practice, it has been found that the lightning failure rate of generator sets with a grounded neutral point is relatively high.

(3) The requirements for grounding quality are relatively high, and ordinary users cannot meet them. An unsafe working ground is worse than no ground.

(4) Generator sets with a grounded neutral point will conceal the leakage faults and grounding errors of the load, and these faults and errors cannot be exposed under the large-current power supply of the municipal power grid.

Dingbo Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to [email protected] we will pay highly attention on your question.