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The future of safer, reliable, and sustainable transformer bushings

Through continuous investments in Research & Development, Hitachi Energy became the inventor of the paperless, Resin Impregnated Synthetics (RIS) bushing technology. In our flagship RIS line EasyDry®, we have substituted traditional paper insulation with homogeneous synthetic material, resulting in superior product properties and lifetime.

Hitachi Energy’s paperless RIS bushings are made of a synthetic non-woven material that is wound around a conductor with aluminum foil inserts for electrical stress control. The core is afterward vacuum-impregnated with epoxy resin and cured, giving a partial discharge-free dry bushing.

This paperless bushing technology has an advanced insulation performance due to its non-hygroscopic insulation that is not sensitive to moisture ingress and absorption. In addition, RIS bushings will have a superior effect on the power factor (dielectric losses), and the intrinsic aging behavior leading to an extended product lifetime.


Product Scope:

  • Voltage: 52-550 kV
  • Current: ≤ 5,000 A
  • Technology: Resin-impregnated synthetics (RIS) with silicone or porcelain insulator
  • Conductor system: Draw lead, fixed bottom contact, removable rod conductor, and draw rod conductor

Why choose EasyDry®

Acceleration of the entire value creation process

  • Simple to select the right bushing solution with our online configurator COMPAS. Comprehensive product documentation at your fingertips, online RFQ at any time.

Seamless upgrades and replacements

  • Direct replacements of the dry bushing and easy adaption for OIP bushings. Solutions for many bushing brands.

The Future of Transformer Bushings - Live & interactive webinar (Recorded version)

Join us for the live and interactive webinar we hosted on June 15, 2023. Our global experts, Mr. Jens Rocks and Mr. Roger Hedlund, unraveled the remarkable potential of transformer bushings.

💻 You can watch the recorded webinar right now with instant access. Register for free and watch now or later at your convenience!

Register now!

👉 Discover cutting-edge technology reshaping the transformer industry

👉 Explore innovative bushings advancing reliability and sustainability

👉 Engage in a live Q&A session with our experts

Don't miss this opportunity to gain insights from industry leaders!

💪 Together, let's shape the future of transformer bushings!


Rest easy knowing your transformer is future ready

Contact us to upgrade to EasyDry® today