Electrical transformers make humming and buzzing noises, whether they are installed in a residential or industrial area. The vibrating sound mimics the sounds motors and generators produce. This noise is mainly caused by magnetostriction, a process through which a magnetic steel sheet transforms its dimensions or shape when it's magnetised. Once magnetisation is taken, the sheet changes into its primary form. Noises that transformers make may be controlled but can't be eradicated.
Facts about transformer noise include the following:
- The transformer design determines the amount of noise the unit produces.
- Transformer noise emanates from its core.
- Loading the transformer doesn't create a significant difference in the sound.
- Some design adjustments can be made during installation to lessen noise levels, but don't expect a significant change.
Nonetheless, there are some precautions that transformer owners can take when mounting their units to minimise the audible humming. This piece will outline the tips below.
Install it in a low-traffic area
Since you already know that the noise a transformer makes cannot be eliminated entirely, be smart as you choose the installation spot. When you place it in a high-traffic area, people will get annoyed with the noise, particularly if the other sounds are lower than the transformer's sound. A low-traffic area is more ideal for installation, so choose the location wisely.
Install it on a solid surface
Transformers should be installed on a solid surface, such as a concrete floor or wall. Plywood surfaces and curtain walls accelerate the humming noise and make it unbearable. Ensure the mounting surface is much heavier than the transformer.
Avoid stairs, corridors and corners
As you select a spot to install your transformer, be sure to avoid corners, stairs and hallways. Room corners are near the ceiling, which increases the noise that will be heard when one is working in the next building. What's more, corners tend to amplify sound. The same applies to corridors and stairs.
Go for oil barriers
The use of oil barriers, sound-dampening materials and cushion padding can aid in reducing noise and controlling it to ensure it doesn't spread. While these options will not lessen the vibration, they'll reduce the frustration the transformer causes amongst people who work nearby.
Ensure bolt enclosures are tightened
Screws and bolts on the cover and top of the transformer need to be adequately tightened. As the generator continues to work, the loose parts will vibrate, automatically increasing the noise.