Humming Noise of transformer

When it comes to power regulation, transformers are everything. Step-up and step-down transformers can boost or lower voltages to apply whatever level of power is necessary for a given application.
Transformer noise can be a significant problem. Even small amounts can gum up the works and prevent power transformers from working the way they were designed. It is very important to know exactly what transformer noise is, why it causing it and how to prevent it.

What Causes the Humming Noise in an Electrical Transformer?

There are actually multiple causes of transformer noise.

The main one is the Magnetostriction Effect. This is when the current that flows through the transformer’s coils creates a magnetic field. The magnetic field then changes the dimensions of the transformer’s iron core. The core expands and contracts with the alternating current, which causes a humming sound. As the transformer ages, the layers within the core of the transformer begin to break apart and separate from one another. 

This causes the vibrations to get louder But determining whether the amount of noise is excessive is trickier than it sounds because all transformers “hum” to some extent. Certain amount of humming is normal, but there are steps to control it if the transformer’s performance measurements are outside the specified parameters for current, voltage or both. It can also be necessary to do this in certain work situations as well to keep workers more effective and productive.

How Can You Stop Transformer Noise from Happening?

Unfortunately, you will not be able to completely eliminate the sound your transformer makes, but you can minimize it. The most obvious way is to have your transformer installed in a low traffic area where it won’t annoy the people working for you.

Avoid Corners, Stairwells and Corridors

The next step has to do with spacing. Specifically, putting transformers in tight spaces amplifies the noise and humming, and it also reflects back any interference that may be present. To counter this, make sure your transformers aren’t located in corners, corridors or stairwells whenever possible.

Mount the Unit on a Solid Surface

Always mount your transformers on a solid surface. Plywood surfaces amplify noise, and so do thin walls that are basically used as curtains in interior structures. To get ideal performance, transformers work best when mounted on heavy, dense surfaces like concrete floors or walls, so these should be your preferred surfaces whenever possible.

Tighten the Bolts on Enclosures

Make sure the bolts and screws on the transformer are adequately tightened. Loose parts will add vibration, which increases the hum, and you should always make sure to avoid lifting eyebolts, as these can also increase noise if used during installation.

Use Acoustical Dampening Material

One is to use acoustic dampening material, which will help keep the noise from spreading. Acoustic tile is one of the best dampening materials you can use, and fiberglass and kimsul are other solid examples of good dampening material. Another is to use materials like oil barriers or cushion padding. These won’t eliminate the noise, but they will make it easier for people working in transformer areas to deal with the hum, which can be irritating.

Having any transformer issues, Contact us,

Sankalp Industrial Services