【Summary】When dry-type transformers are running, there is no noise at all. This is normal, but sometimes there will be a lot of noise, which means that you can judge whether the transformer is faulty by sound. In fact, the sound of the dry-type transformer can also be seen whether there is damage to the dry-type transformer. If there are several problems in the sound of the dry-type transformer, it means that the dry-type transformer is malfunctioning and needs to be repaired. When common dry-type transformers are running, these sound problems indicate that your dry-type transformer is broken. Let’s take a look at it in detail below: There is noise in the dry-type transformer. If the sound of the transformer is higher than normal and there is noisy noise, but the current and voltage are not abnormal, it may be caused by the loosening of the clamp or the screw pressing the iron core, which makes the silicon steel sheet vibrate. There is a discharge sound from the dry-type transformer. If partial discharge occurs on the transformer or the surface, there will be a "crack" discharge sound in the sound. When this happens, if you can see blue corona or sparks near the transformer bushing at night or in rainy weather, it means that the porcelain is very dirty or the equipment clamps are in contact; if the transformer discharges, it is not Electrostatic discharge of grounded parts, or contact discharge of tap changer, the transformer should be further tested or disabled. There is a sound of boiling water in the dry-type transformer. If the sound of the transformer is mixed with the sound of water boiling, the temperature changes, and the oil level rises, it should be judged that the transformer winding has a short-circuit fault, or the tap switch has caused serious overheating due to contact, and the transformer should be stopped for inspection. There is a popping sound in the dry-type transformer. If the sound of the transformer is mixed with uneven popping sound, it is the insulation breakdown of the transformer or the surface. At this time, the transformer should be stopped for inspection. The above sound problem is a detail that cannot be ignored. Everyone should take good care of it. Otherwise, it will not work well. Not only does the dry-type transformer do not work well, it may also shorten the service life!