The possible reasons for high noise in dry-type transformers are as follows:
1. Due to voltage issues
High voltage can cause overexcitation of the transformer, resulting in increased and sharp noise, which directly and seriously affects the noise of the transformer.
2. Resonance issues caused by fans, casings, and other components
The resonance of fans, casings, and other components will generate noise, which may be mistaken for transformer noise.
3. Installation issues caused
Poor installation can exacerbate transformer vibration and amplify transformer noise.
4. Due to the impact of the installation environment
The operating environment affects the noise of the transformer, and the unfavorable environment increases the noise of the transformer by 3dB to 7dB.
5. The vibration of the busbar bridge caused
Due to the large current passing through the parallel busbar, the busbar vibrates due to the leakage magnetic field. The vibration of the busbar bridge will seriously affect the noise of the transformer, causing the noise of the transformer to increase by more than 15dB, which is difficult to determine. Generally, users and installation units may mistake it for the noise of the transformer.