Analysis of Abnormal Operation of Transformers, How to Solve Abnormal Sound
Writer： Hengfeng you electric Time：2023-04-28 views：times
As soon as the transformer is powered on, there is a buzzing sound, mainly due to the effect of high-voltage magnetic flux. During normal operation, the sound of the transformer is uniform. When there are other noises, the cause should be carefully investigated and dealt with.
Hengfengyou Electric has conducted the following analysis based on years of experience in producing and manufacturing transformers
1. The sound of the transformer increases compared to usual, and the sound is uniform, which may be due to the following reasons:
(1) Overvoltage occurs in the power grid. When single-phase grounding or resonance overvoltage occurs in the power grid, the sound of the transformer will increase. In this case, comprehensive judgment can be made in combination with the indication of voltmeter.
(2) When the transformer is overloaded, it will make a heavy "buzzing" sound. If the load of the transformer exceeds the allowable normal overload value, the transformer load should be reduced according to the on-site regulations.
Solution: Analyze the cause, keep records, strengthen monitoring, and restore normal operation of the transformer as soon as possible. If it is caused by overload, the principle of overload treatment shall be followed.
2. Transformer has noise
It is possible that the vibration is caused by some loose components on the transformer. If the sound of the transformer increases significantly and there is no obvious abnormality in the current and voltage, it may be due to the loosening of internal clamps or screws that compress the iron core, causing an increase in vibration of the silicon steel sheet.
Handling method: If it does not affect the operation of the transformer, it can be temporarily left untreated. Keep records, strengthen monitoring, report to the dispatch and relevant leaders for power outage inspection and handling.
3. Transformer has discharge sound
The transformer has a "popping" discharge sound. If there is a blue corona or spark near the transformer bushing at night or in rainy weather, it indicates that the porcelain parts are seriously polluted or the equipment line card has poor contact. If the internal discharge of the transformer is caused by electrostatic discharge of ungrounded components or coil turn to turn discharge, or discharge due to poor contact of the tap changer.
Solution: At this point, the dispatch and relevant leaders should be reported to apply for power outage inspection and handling of the transformer.
4. The transformer has a popping sound
If the insulation inside or on the surface of the transformer is broken, the transformer should be immediately stopped for inspection.
5. The transformer has water boiling sound
If there is a sound of water boiling in the transformer, and the temperature changes rapidly and the oil level rises, it should be judged as a serious overheating caused by a short circuit in the transformer winding or poor contact of the tap changer. The transformer should be immediately stopped for inspection.
Hengfengyou is a professional electrical company specializing in the production, manufacturing and sales of electrical distribution products, mainly engaged in the production and global sales of distribution transformers, rectifier transformers, electric furnace transformers, etc. We have provided OEM / ODM services for customers in Europe, America and the Middle East for 20 years. It can provide customized production of transformer core, transformer coil and transformer shell. Hengfengyou Electric will provide you with the best electrical product solutions. https://www.hengfengyou.com ； info@hengfengyou.com WhatsApp：+86158 5325 2696（Jack） +86158 5326 5269（Alisa）
