Notes on the use of diesel generator sets in the communications industry

  Any machine has a time of failure, for diesel generator set is no exception, this article will provide you with a comprehensive view of the diesel generator set safety hazards, and the day proposed the corresponding solutions to help Everyone better understand the problems of diesel generating sets.

  When we talk about diesel generator sets, the first thing that comes to mind is the communications industry, because the back-end load of diesel generator sets used in the communications industry now does not reach full load or even most of them are running below half load, which is a "big marat car" phenomenon, so it is not easy to find problems and deal with problems in a timely manner.In case of emergency, after the utility power is stopped, the diesel generator set must immediately provide power to the back-end negative, although communication equipment have battery and UPS backup power, but this is a short time power supply equipment, so the diesel generator set has become the last guarantee of communication backup power, once the diesel generator set load capacity and the electrical characteristics of the indicators do not meet the requirements of communication power, will not be able to normal power supply, will lead to communication interruptions, such accidents occur from time to time, all over the world, we can analyze the causes of such accidents, in order to put forward effective solutions.

  According to our long-term investigation and research in the communications industry backup power supply, the following points need special attention：

  1. Acceptance of diesel generator set after completion

  Since there is no special instrument for loading and testing, it is impossible to detect whether the output rated power and load capacity can meet the design requirements after the completion of the project, which directly affects the project acceptance; Although the environmental noise is reduced after some units are equipped with noise reduction equipment, it has a certain impact on the output power of the unit, and it is impossible to detect how much unit output power is lost, whether the quality of the noise reduction project meets the contract requirements according to the original design and what is the reasonable loss power of the unit.

How to extend the service life of the generator, so that the generator to play the maximum energy, the pre-installation of diesel generator sets is very important, the following are installation considerations:

  ①The installation site needs to be well ventilated, the generator end should have sufficient air inlet, the diesel unit end should have a good air outlet. Outlet area should be greater than the tank area of more than 1.5 times, the air inlet is not good or does not meet the requirements, the air into the cylinder less, which will cause the cylinder fuel is not sufficient, carbon, affecting the diesel generator set load capacity; the same exhaust does not meet the requirements, the air in the engine room oxygen content is reduced, will also cause the cylinder fuel is not sufficient, carbon, affecting the diesel generator set load capacity .

  ②The surrounding area of the installation site should be kept clean and avoid placing items that can produce corrosive gases and vapors such as acid and alkaline in the vicinity. Fire extinguishing devices should be installed if available.

  ③In indoor use, the smoke exhaust pipe must be guided outdoors, the diameter of the pipe must be 2 silencer diameter of the smoke pipe, the elbow of the connected pipeline should not exceed 3, to ensure the smooth flow of smoke exhaust, and the pipe should be tilted downward 5-10 degrees to avoid rainwater injection,If the exhaust pipe is installed vertically upward, it must be equipped with a rain cover. In order to improve the output power of the diesel generator set, in the cylinder capacity and the number of certain cases, only to force more air into the cylinder so that the fuel in the steam new fully do burn, in order to improve the average effective pressure of the unit, the current diesel generator set are using turbocharged musical instruments, which will be on the diesel Once the exhaust gas is not smooth or exhaust gas speed does not meet the requirements, the air into the cylinder is reduced, which will cause the diesel generator set with a reduced load capacity.

  ④If the foundation is made of mixed soil, the level should be measured with a level ruler during installation, so that the unit is fixed on a level foundation. There should be special anti-vibration pads or foot bolts between the unit and the foundation.

  ⑤The housing of the unit must have a reliable protective grounding, and for generators that require direct neutral grounding, the neutral grounding must be performed by professionals and equipped with lightning protection devices, and the use of utility grounding devices for direct neutral grounding is strictly prohibited.

  ⑥The two-way switch between the generator and the utility must be very reliable to prevent backward power supply. The wiring reliability of the bi-directional switch needs to be tested and approved by the local power supply department.

  ⑦The wiring of the starter battery must be solid

In summary, after the installation of the diesel generator set, it must be accepted, mainly with load capacity test and electrical characteristics test, whether it can meet the power level required by the original bidding or whether it meets the capacity requirements of the original design, so as to achieve a clear idea and avoid the occurrence of safety accidents。

  2. Limitations in the routine maintenance of diesel generator sets

  The implementation of the current maintenance operation plan for diesel generator sets is limited to the following maintenance tools.

  Inspection of the four leakage phenomena of the unit, surface, starting battery, oil and fuel, etc

  Clean and improve the environment of the machine room, regularly replace the three filters.

  No load is carried out every month, and maintenance such as loading test machine is carried out every six months.

  Use power monitoring to observe electrical quality parameters in real time.

  Limitations of maintenance means:

  Load tests in existing maintenance are also only load tests of existing powered devices on the backend.

  The electrical characteristics and parameters of the diesel generator set are tested under full load and full load at the specified time.

  A large amount of carbon deposits generated by no-load testing machines and small power belt loads.