Anti-vibration system

When electrical transformers with dielectric oil or cast resin dry-type transformers are operating, they emit a characteristic noise generated by vibrations of the magnetic laminations (magnetostriction) they contain. These vibrations are produced by the alternating current at 50 Hz flowing through them, creating a fundamental vibration frequency of 100 Hz along with several corresponding vibration harmonics.

To dampen these vibrations, we recommend using SanerVib^® dampers between transformer support points (feet, beams, wheels, etc.) and the floor. These are low-frequency silent blocks specifically developed to provide high anti-vibration performance at transformer excitation frequencies, according to the equipment weight and the desired attenuation level.

SanerVib^® devices must be selected precisely so that the internal damping elements are neither over-compressed nor under-compressed, ensuring they fully perform their function. SanerVib^® products are available with two vibration absorption levels (up to 80% and up to 99%).

They can be configured according to three application types:

• SanerVib for wheels: designed for transformers equipped with wheels,
• SanerVib-SG: designed for transformers without wheels,
• SanerVib-VibeR or SanerVib-SL: designed for mobile transformers.

TECHNIKELEC^® also markets anti-vibration plates (AVP): manufactured from nitrile rubber, they reduce the transmission of noise generated by transformer vibrations. They absorb between 40% and 60% of vibrations and are installed beneath industrial machinery.

Why install an anti-vibration system on a transformer?

Origin of vibrations and magnetic humming

You have probably noticed that an energized transformer produces a low continuous humming sound. This physical phenomenon is called magnetostriction. In practical terms, the magnetic core laminations continuously expand and contract under the effect of alternating current. Since the European power grid operates at 50 Hz, this creates a 100 Hz vibration frequency together with each associated vibration harmonic. This constant movement is exactly what generates the characteristic magnetic humming of these machines.

Impact on infrastructure and acoustic comfort

If left untreated, these vibration waves travel directly through floors and walls. Over time, this constant mechanical stress can weaken building foundations. Implementing proper electrical infrastructure protection primarily means preventing your facilities from aging prematurely. In addition, acoustic attenuation is no longer optional. It has become both a health and regulatory requirement to ensure the well-being of employees and nearby residents, especially in dense urban or industrial environments.

Anti-vibration solutions designed for transformers

Low-frequency dampers for vibration isolation

When dealing with waves around 100 Hz, conventional equipment quickly reaches its limits. This is where a low-frequency damper makes a significant difference, as it specifically targets this critical range. This technology ensures effective transformer vibration isolation by literally separating the equipment from its support structure, blocking vibration transmission before it reaches the ground.

Industrial silent blocks and elastomer suspension systems

In practice, the machine rests on a carefully calibrated industrial silent block. Whether equipped with an elastomer suspension system or premium-grade metallic springs, these supports are designed to deform intelligently under load. The result is highly efficient vibration absorption while maintaining perfect stability for machinery weighing several tons.

SanerVib range: performance and adaptation to your requirements

Selecting the right system according to load and installation

The secret behind an efficient support system lies in its compression level. With a static load that is too light, the block remains excessively rigid. Conversely, if the load is too heavy, it compresses entirely and loses its performance characteristics. This is why the SanerVib range offers several compression levels. The goal is to achieve the ideal anti-vibration efficiency, capable of absorbing up to 99% of mechanical vibrations depending on the selected model.

Different models for fixed and mobile transformers

Since no two installations are identical, customized solutions are essential. The SanerVib SG model, for example, fits directly beneath the frame of wheel-free transformers. For equipment mounted on rollers requiring lateral stabilization, the SanerVib SL or SanerVib VibeR models are more suitable. These components fit beneath the axles to stabilize the machine while damping even the slightest movements.

Noise reduction and sound insulation optimization

Limiting vibration transmission through structures

Noise travelling through walls does not move through the air; it travels through solid materials. Structure-borne noise reduction specifically aims to break this physical transmission path. To achieve effective sound insulation for dry-type or oil-filled transformers, everything begins at the equipment contact points with the floor. By properly isolating the base, structural resonance within the building naturally disappears.

Completing the system with nitrile rubber anti-vibration plates

For lighter installations, or simply as reinforcement for a primary system, installing a nitrile rubber plate provides an excellent first level of protection. These technical mats absorb between 40% and 60% of surface vibrations. They can easily be installed beneath any industrial equipment to immediately reduce vibration and noise transmission.

How to choose a high-performance anti-vibration system

Taking load, frequency and environment into account

Support equipment should never be selected randomly. The first step is calculating the exact load at each support point to properly manage the static load. Next, evaluate the surrounding environment. Whether the machine is installed indoors, outdoors, or exposed to hydrocarbons, these conditions directly determine the material selection for your support block or vibration mount.

Adapting the solution to the transformer type

From a mechanical standpoint, a cast resin dry-type transformer behaves very differently from an oil-filled transformer. The center of gravity, weight distribution and mounting configuration all play an important role. These parameters help determine the most suitable anti-vibration mount, whether it needs to fit smooth beams, threaded feet, or rolling systems.

TECHNIKELEC: your partner for industrial anti-vibration solutions

Fast availability of solutions for professionals

Technical support to optimize your installations

Selling high-quality products is important, but helping you size them accurately is even better. Our objective is to guide you toward the exact reference that will protect your infrastructure while perfectly meeting current acoustic standards.

Improve the long-term performance of your electrical installations

Investing in an effective vibration treatment solution ultimately means adding years of service life to heavy equipment. By eliminating the effects of magnetostriction vibrations, you protect your buildings while creating a quieter working environment. Choosing the right supports ensures your electrical network operates smoothly and silently for years to come.

Frequently Asked Questions

Why install an anti-vibration system on a transformer?

An anti-vibration system reduces vibration transmission generated by transformer magnetostriction. It protects building structures, limits noise pollution and improves acoustic comfort while extending equipment lifespan.

What is the main source of transformer vibrations?

The main source is magnetostriction, a physical phenomenon in which the magnetic laminations inside the transformer core continuously expand and contract under the influence of alternating current. This creates a 100 Hz vibration frequency and associated harmonics.

What vibration absorption level can SanerVib systems achieve?

Depending on the selected model, SanerVib® solutions can absorb up to 80% or even 99% of mechanical vibrations generated by transformers.

Can anti-vibration plates be used with industrial equipment other than transformers?

Yes. Nitrile rubber anti-vibration plates can be installed beneath many types of industrial machinery to reduce vibration transmission and structure-borne noise.

How do I choose the right anti-vibration support?

The selection depends on several factors including the equipment weight, vibration frequency, installation environment, and the transformer type (oil-filled, dry-type, fixed or mobile).