How to judge the operation of the transformer based on the sound?

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answer: The slight buzzing sound emitted by the transformer when it is running, this sound is regular and clear ； Exceptions are as follows: ① When the buzzing sound changes but there is no noise, the load may have changed. ； ② Due to the startup of large power equipment, a "wow" sound occurs inside the main transformer. If the transformer has non-linear equipment such as an electric furnace, silicon will flow forward and produce high-order harmonics, and a "wow" sound will also occur. ； ③ Overload will cause a high and heavy "buzzing" sound in the transformer ； ④ Due to short circuit or grounding, a large amount of short circuit current passes through, causing a lot of noise in the transformer. ； ⑤ Due to loose internal parts, abnormal effects occur inside the transformer. ； If the core screw clamp is not tight, the iron core will become loose, causing strong noise inside the transformer. ； ⑥ The transformer makes a discharge sound due to poor internal contact or breakdown. ； ⑦ Due to ferromagnetic resonance, the transformer emits uneven noise.