Haihong's low-noise dry substation has won praise from residents

       Two sets of SCB10-630/10 laminated core resin insulated dry-type transformers in No. 11, Market Town, People's Hospital, Shiji Town, Panyu, Guangzhou, were strongly opposed by nearby residents due to excessive noise, which seriously affected the normal life of residents. complaint. The relevant power supply department attached great importance to this, and immediately made a positive response to research solutions, and at the beginning of March this year, replaced the on-site products with two new laminated core resin-insulated dry-type transformers. However, the noise is still high after the replacement, and the complaint has not been resolved.

       After learning that the open three-dimensional wound core dry-type transformer produced by Haihong Electric Co., Ltd. has low noise characteristics, the power supply department communicated with relevant personnel of Haihong and decided to replace the two high-noise products on site with the open transformer produced by Haihong. Three-dimensional wound core dry-type transformer products.

       In April this year, after-sales service personnel went to Panyu Shiji Institute to replace the transformer, and tested the noise of the transformer before and after the replacement. As shown below: 

       Comparing the noise value before and after the replacement: the noise value of the open-type three-dimensional wound core dry-type transformer with the same capacity is lower by about 25dB on average than that of the laminated core resin-insulated dry-type transformer, and it is lower than the external environmental noise of the power room, basically reaching strong>Mute status。The remarkable noise reduction effect of the open ventilated 3D wound core dry-type transformer has been unanimously recognized by the power supply department, the power equipment installation company and nearby residents.

       With the sharp increase of electricity consumption in cities, more and more power distribution rooms need to be built in residential areas and densely populated places, which brings about some noise nuisance problems, such as the above-mentioned nuisance complaints are also increasing. This year, a city's power supply bureau received more than 200 complaints about noise nuisance from distribution transformers. The power supply department is also actively trying to find ways to deal with these complaints, taking measures such as installing shock absorbers for transformers and installing sound insulation materials in power rooms. However, the investment of external measures is large, and the effect is not ideal (only 3~5dB can be reduced). The reason is that the noise of distribution transformers mainly comes from the iron core. If the product noise is too high due to structure or process, it is difficult to achieve the expected effect through external treatment measures to reduce noise. Therefore, the fundamental and effective measure to solve transformer noise nuisance should be: install low-noise transformer products.

       Haihong open-type three-dimensional wound core dry-type transformer has the characteristics of low noise (at present, it can produce products with a noise sound pressure level of 38 decibels and almost silent), small electric field and magnetic field radiation, low no-load loss, and compact structure. It is very suitable for residential areas. , The installation environment in densely populated areas.

Resin dry-type transformer before replacement 

        Replaced open ventilated dry-type transformer