List of products by supplier: SanerVib
Issue:
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.
The SanerVib® solution: 80 or 99% absorption?
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 ™ silentblocs 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.
The choice of materials: SANERGRID®’s expertise
The solutions usually used are plastic or elastomer materials which are very subject to temperature variations and see their damping coefficient decrease over time. And therefore need to be changed regularly.
Instead for the manufacture of our SanerVib® dampers, we have chosen metal core elements whose elasticity module varies very little over time and which are less influenced by the temperature. Therefore providing a constant absorption performance. The SanerVib® surface treatment has also been reinforced so that their aging is close to the life of the transformer they equip.
