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A new solid insulation for liquid immersed transformers: Delivering Longer Life, Greater Overload Capability

Learn about DuPont’s innovative solution to the life expectancy and loading problems commonly associated with liquid immersed transformers. This presentation explains how a new engineered cellulose insulation, made with DuPont Nomex®, delivers cost/performance optimization.

Date: September 30, 2013
Time: 11 AM EDT (8 AM PDT)
Duration: 1 hour
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As the global demand for energy increases, so does the need for high-temperature transformers. Today, state-of-the-art computer programs have extracted about as much cost as possible in pursuit of competitive designs. High-temperature, liquid-immersed transformers represent one of the few opportunities available for longer life, increased capacity, and/or smaller size. While high-temperature design has been around for many years, its use has been limited by the high cost of insulation and the lack of standards governing high-temperature applications. Now the standards are in place and available to shape development in this area. The logical next step is the development of materials to take advantage of these standards. This presentation will look at a new high-temperature insulation concept for liquid-immersed transformers. Built around DuPont Nomex®, the engineered cellulose insulation can be used to deliver improved transformer life or improved overload capability.

Key Take-Aways

  • Discover why the power of Nomex®, combined with the value of cellulose, offers a unique solution to the life expectancy and loading problems of liquid immersed transformers
  • Learn how Nomex® engineered cellulose insulation overcomes the cost/performance barriers of high-temperature transformer design
  • Understand how this new insulation delivers longer life and higher overload capability to liquid immersed transformers


Richard Provost, Consultant, DuPont™ Nomex® Energy Solutions

Retired from DuPont after 34 years, Richard Provost is an expert in the field of paper and pressboard for electrical insulation products, processing, and applications. He served as a working group chairman in the IEEE Transformers Committee for 20 years, and participated in multiple working groups for liquid and dry type transformers. He also served in the U.S. Technical Advisory Group and as U.S. Delegate to IEC for 18 years. Currently a consultant for DuPont's DPT Energy Solutions business, Provost received his B.S. and M.S. degrees in Chemical Engineering from the University of New Hampshire.