Current Trends

Transformer manufacturers can be faced with difficult decisions when it comes to large-scale investment. Uncertainty can delay large-scale investments resulting in equipment with older technology and inefficient work procedures being left in production.

In this paper the authors expose a method where re-alignment of existing machines (through the integration of machine technologies such winding mandrels, wire flattening, cold welding, etc.…) can be done with incremental investment allowing companies to improve current processes while managing capital investment.

The application of the Staged Investment method proposed in this paper can be adapted to other peripheral transformer component manufacturing lines such as cores or tanks with excellent results.

Low voltage bushings are an important component of distribution transformers, whether they are pole mounted or pad mounted, and are often relegated to low priority.

Electrical insulating component design has become increasingly challenging due to rapidly changing requirements in power industry applications. Cost reduction and increased performance requirements present new challenges for traditional insulation solutions. Modern insulating component designs must push the limits of dielectric performance while maximizing mechanical strength characteristics in a host of environments. In particular, the recent advancements in the use, size and scale of renewable energies such as solar and wind power necessitate enhanced performance epoxy insulating materials capable of delivering high dielectric and mechanical strength in high temperature environments. This paper summarizes a brief history and current state of epoxy component insulation with commentary on advancements that require enhanced material performance for high temperature applications.

As technology evolves and MV transformers are located in the turbine nacelle next to the generator, it is more important than ever to have the appropriate transformer bushings. Higher ambient temperatures, higher transformer insulating temperatures, frequent vibrations, smaller spaces, and costly possible repairs translates into the critical choice of the right bushing design.

IEEE style pad-mounted transformers have been used in the Americas and other parts of the world for a long time. However, it can still be somewhat of an unknown transformer style in some markets. With the increased demand from the USA, mostly for pad-mounted transformers for onshore wind farm and solar applications, transformer manufacturers from IEC markets may not be all that familiar.

The H-J Family of Companies was founded on the very principles that set it apart today – the desire to supply customers with the highest quality products delivered on time at a competitive price.

The H-J Family of Companies is dedicated to continuous improvement of manufacturing processes to provide value for customers and stay at the top of the electrical industry. Check out this article about how H-J has strategically used CAM software and engaged in training to maximize their CNC machines and improve workflow efficiencies.

The H-J Family of Companies is a global leader in the manufacture and supply of components to the transformer and switchgear OEM and utility markets.

The H-J Family of Companies has extensive experience with forgings and castings in many ferrous and non-ferrous alloys such as copper, aluminum, stainless steel, etc. This presentation is intended to help educate customers about some of the basics types of forging and casting processes, as well as some of the advantages and disadvantages of each.