Noise Caused By External Structure Of Dry-type Transformer And Its Solution

(1) Dry Type Transformer generally has a fan cooling system. The abnormal noise of dry-type transformers is often caused by the failure of the fan system. There are three main types of fan failure phenomena:

① When the fan is put into use, it makes a "crackling" metal collision sound. This is because there is a foreign object in the fan, and the foreign object needs to be cleaned.

② When the fan is just started, it makes a friction sound and it continues. This is a quality problem of the fan itself. The fan must be replaced to ensure the normal operation of the fan system.

(2) Transformers with a protection level of IP20 or IP40 have a shell device. This shell will also be the source of transformer noise. The transformer will vibrate during operation. If the shell is not fixed properly, it will cause the shell to vibrate, thereby generating noise. Therefore, when installing the shell, it is best to add rubber pads between the shell and the ground and between the shell and the transformer base to reduce the spread of vibration sound.

(3) After entering the power room, you can hear a "buzzing" sound that is sometimes high and sometimes low in a certain direction of the transformer. This is the result of the superposition of the sound waves generated by the vibration of the transformer through the reflection of the wall. This situation is quite special and is related to the space of the power room and the placement of the transformer. At this time, you can adjust the position of the transformer to reduce the sound, or you can appropriately install some sound-absorbing materials on the wall in the power room.

(4) If the floor or bracket at the installation location of the transformer is not good, it will aggravate the vibration of the transformer and increase the noise of the transformer. Some transformers are placed on a loose ground. At this time, you will find that the ground will vibrate, and you will feel the vibration when standing next to it. In serious cases, you will see cracks on the ground. If this is the case, you need to reinforce the placement of the transformer to reduce the noise.