Problems of vibrations and noise levels of transformers:
When the oil filled electrical transformers or dry type cast resin transformers are in operation, they emit a characteristic noise resulting from the vibrations of the magnetic sheets (magneto constriction) that they contain. This vibration comes from the alternating current in 50 Hz which pass through them, characterizing a fundamental vibration frequency of 100 Hz and several harmonics of corresponding vibrations.
Depending on the electrical load used, the design and the age of the transformer, these vibrations may increase over time. In addition, depending on the installation location (parking lot, basement of the building, roof, etc.) these vibrations can resonate with the frame and the building.
SanerVib® solution to reduce transformer noise:
In order to dampen the vibrations generated by each electrical transformer, we have designed the SanerVib® range: composed of several low frequency silentblocks specially developed to provide high antivibration efficiency at the excitation frequencies of the transformers, depending on their weight and attenuation required :
- 80% for the SanerVib80 ™ series,
- and up to 99% for the SanerVib99 ™ series.
The SanerVib80 ™ silentblocks consist of a stainless steel cushion encapsulated between a metallic plate and a support for the transformer wheel.
SanerVib99 ™ silent blocks are made up of one or more cores with a high-strength metal spring and a stainless steel fiber cushion at its heart.
Why using metallic vibration dampers for electrical transformers?