Tesar
Cast resin transformers for demanding applications worldwide
Tesar – Expertise in cast resin dry-type transformers
Tesar brings together all global activities in cast resin dry-type transformers and instrument transformers within the R&S Group. With locations in Italy (Tesar Italia), Poland (Tesar Polska) and the United Arab Emirates (Tesar Gulf), the group offers a consistent portfolio of cast resin transformers and current and voltage transformers for medium-voltage applications – from standard distribution networks to complex industrial and infrastructure projects.
As one of Europe’s pioneers in cast resin technology, Tesar has been developing dry-type transformers since 1979 with high fire safety classes, low maintenance requirements and excellent electrical performance. More than 100,000 Tesar transformers installed worldwide are a reference for technical reliability, efficiency and long service life.
Tesar is active in European and international standardization committees and works closely with utilities, EPCs, planners and operators. Applications range from renewable energies (wind, solar, BESS) and data centers, tunnels, hospitals and airports to rail power supply, near-offshore projects and critical infrastructure.
Tesar’s strengths at a glance:
Cast resin expertise since 1979
Deep know-how in design, casting processes, resin systems and aging behavior of dry-type transformers.
Three production sites – one quality standard
Development and manufacturing in Italy, Poland and the UAE with harmonized standards, certified management systems (including ISO 9001, 14001, 45001) and state-of-the-art test laboratories.
Ecodesign & energy efficiency
Loss-optimized designs in line with EU Ecodesign requirements and international standards; focus on low total cost of ownership (TCO) and CO₂ reduction.
Broad range of applications
Solutions for distribution networks, industry, infrastructure, data centers, ports, renewable energy projects, rail, e-mobility, storage applications and special projects in demanding climate zones.
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Every casting a promise of quality
“When casting our windings, every second counts – our experience makes the difference in safety and durability.”