First of all, it is necessary to judge whether it belongs to the noise of the power adapter because the resonance of the fan, casing and other parts will generate noise, which is generally mistaken for the noise of the power adapter.
Judgment method:
1) Shell: Press the aluminum plate (or steel plate) of the shell with your hand to see if the noise changes. If there is a change, it means that the shell is resonating.
2) Fan: Use a dry long wooden stick to top the casing of each fan to see if the noise changes. If there is a change, it means that the fan is resonating.
3) Other parts: Use a dry long stick to top each part of the transformer (such as wheels, fan brackets, etc.) to see if the noise changes. If there is a change, it means that the parts are resonating.
Solution:
1) Check whether the aluminum plate (or steel plate) of the power adapter shell is loose. It may be deformed during installation. It is necessary to tighten the screws of the shell, fix the aluminum plate of the shell, and correct the deformed part.
2) To see if the fan is loose, it is necessary to tighten the fastening bolts of the fan, and put a small piece of rubber between the fan and the fan bracket, which can solve the problem of fan vibration.
3) If the parts of the power adapter are loose, they need to be fixed.
3. Installation problems
Reason: Poor installation will aggravate the vibration of the transformer and amplify the noise of the transformer.
Judgment method:
1) The foundation of the transformer is not firm or flat (one corner is floating), or the bottom plate is too thin.
2) Using channel steel to stand up the transformer will increase the noise.
Solution:
1) The original installation method shall be modified by the installation unit.
2) Power Adapter Anti-vibration rubber pad is added under the trolley to solve some noise.
4. The influence of the installation environment
Reason: The operating environment affects the noise of the transformer, and the unfavorable environment increases the noise of the transformer by 3dB to 7dB.
Judgment method:
1) The transformer room is very large and empty, there is no other equipment, and there is an echo.
2) The power adapter is too close to the wall, less than 1 meter. The transformer is placed at the corner, and the reflected noise from the wall is superimposed with the transformer noise, which increases the noise.
3) The oil transformer was originally used, and the noise of the transformer will be affected after the dry transformer is replaced. The reason is that the crude oil transformer room is relatively small, and there is an oil leakage chamber and an oil leakage hole, and the transformer is like being placed on a speaker.
