Why is seismic resistance essential for strategic electrical installations?
The analysis of earthquake effects has highlighted the vulnerability of certain electrical installations, resulting in power interruptions in strategic buildings. Power transformers are sensitive components within electrical distribution systems; therefore, their correct operation during and after seismic events is essential to ensure power supply continuity to critical facilities such as hospitals, barracks, and civil protection coordination centers.
How do IREM isolation transformers meet seismic resistance requirements?
This need has been addressed through a recent supply of isolation transformers with power ratings between 80 kVA and 300 kVA, manufactured with seismic-resistant construction features, without the use of base-isolation systems.
Which construction solutions enable high seismic performance?
The required performance is achieved through a detailed design study and the adoption of specific engineering solutions, including:
- a special execution of windings with radial fastening using insulating materials to ensure mechanical integration with the core;
- a dedicated support structure designed to counteract oscillations of the laminated magnetic core;
- a cable fastening system that reduces the propagation of stresses to electrical connections;
- a cable entry configuration equipped with elements that protect the insulating layer from the enclosure;
- a base fastening system ensuring effective connection of the transformer to the building structure;
- a fully removable protective metal enclosure designed to facilitate transformer connection and enable fast cleaning and maintenance operations.
How does IREM’s expertise in Power Quality contribute to antisismic solutions?
IREM’s established experience in designing and manufacturing voltage stabilisers with seismic characteristics has also been applied to power transformers. This technical know-how has added an additional performance requirement to the range of products offered to support Power Quality and the protection of electrical infrastructures in high-criticality environments.
