bengt johnnerfelt
It is always inspiring to solve an insulation problem for a client or a system

Bengt Johnnerfelt is Insulation and Protection Engineering Manager. He is a specialist in the testing and dimensioning of ZnO-blocks, the design, testing and application of surge arresters, and silicone rubber molding of surge arresters and insulators. In 2012, he received the IEC 1906 Award as an expert of IEC Technical Committee No. 37 (surge arresters) in recognition of his valuable contribution over many years of work on TC 37 MT4 and MT10 in the development of IEC 60099-4, Editions 1, 2 and 3, and IEC 60099-8, and now as a convenor of MT10 for the new 60099-5.


What is a current industry challenge that TE engineers are working on?

A cost-efficient 10 kA distribution arrester, and a mechanical strong direct molded high energy HVSA both tested according to the new IEC 60099-4, 2014.


What has been the most interesting project that you have worked on?

The most interesting project was to develop the world’s first direct molded HV surge arrester. Today the challenge of reducing product costs, but still improve both electrical protective data as well as mechanical strength is interesting.


What inspires you? How do you approach tough problems?

For a tough problem, I always ask myself these 3 questions:

  • What is new?
  • What is important?
  • What is difficult?

When you can sort these answers out you will know the critical sections of your project. It is always inspiring to solve an insulation problem for a client or a system, independent if that means a new design or just another selection of an existing arrester.