IREM has recently successfully completed the Factory Acceptance Test (FAT) for a supply of isolation transformers intended to power technological systems in a major infrastructure project. This result demonstrates IREM’s ability to design and build isolation transformers that offer high performance in terms of electrical characteristics, insulation system materials, efficiency and specific properties of resistance to seismic stress.
IREM continues to demonstrate its excellence in the sector, providing reliable and cutting-edge solutions for the most complex challenges. These results contribute to the safety and efficiency of strategic infrastructures, supporting technological progress with products of the highest quality.
What are the technical and seismic safety performances of isolation transformers?
The transformers used are designed to power sensitive loads in a strategic infrastructure, adapting the functional voltage levels and recreating isolated neutral distribution systems. These transformers are sized to consider the distorting component of the load, the impulse withstand levels, the climatic and environmental class, and the reaction to fire performance. In particular, the seismic resistance capacity is essential given the installation in an area subject to strong and destructive earthquakes. IREM offers a complete range of power transformers, made earthquake-proof by construction in relation to the resulting mass. The proposed solutions – validated by FEM analysis or Earthquake shaking table tests – derive from a consolidated experience in the construction of transformers, voltage stabilizers and network conditioners with earthquake-proof design.
How do isolation transformers work?
Isolation transformers are used to recreate the IT regime through galvanic separation of the isolated circuit. In an IT system, a first insulation failure does not lead to system shutdown, thus ensuring greater operational reliability. With the increasing complexity and automation of technological systems in all sectors, from highly sophisticated production lines to robotics, proper functionality depends on a reliable power supply.
- International Building Code (IBC-2009)
- OSHPD Special Seismic Certification Preapproval (OSP)
- IEEE-693/2005: “IEEE Recommended Practice for Seismic Design of Substations”
All windings are vacuum and pressure impregnated to ensure the best possible protection from external agents such as dust and humidity, as well as excellent mechanical resistance. The three-column magnetic core is made of oriented-crystal magnetic steel sheet, with the laminations cut at 45° using a step-lap method at the junctions between the columns and the yoke to minimize the equivalent air gap.
