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Technology Leadership

Decades of Technical Expertise & Industry Leadership

To meet the ever-increasing need for reliable electric power, SPX Transformer Solutions invests in research, technology and new product design, remaining focused on improving industry standards and leading innovations to serve the evolving needs of the power delivery industry.

  • Technical Expertise
  • Engineering & Design Tool Advancements
  • Patent Innovations

Technical Expertise

The expertise and efforts of SPX Waukesha's development engineering team are focused on the needs of the industry. Many SPX Waukesha engineers and managers are recognized industry experts, actively involved in developing National and International Standards for products related to the electrical power industry:

Sam P. Mehta, Vice President, Research & Technology — Author, Instructor, and active member of the IEEE Transformers Committee since 1970. Also, appointed U.S. Delegate to CIGRE (International Council on Large Electric Systems) Transformers Committee A2, receiving the Atwood Associate Award in July 2009. Author of NIST Technical Note 1204, “Calibration of Test Systems for Measuring Power Losses of Transformers”.

Donald Platts, Customer Technical Executive — Don joined SPX Transformer Solutions in 2012 as Customer Technical Executive for the northeast and southeast sales regions. Mr. Platts came to SPX from PPL Electric Utilities, where he worked for 39 years. From 1989 to 2012, Don served as a transformer application specialist in various engineering groups, including Standards Engineering, System Maintenance Engineering and Substation Component Engineering. Prior to that, he worked in the Substation Engineering Design group at PPL where he was responsible for substation design projects and transformer procurement activities. Don is an active member of the IEEE Transformers Committee, presently serving as an officer in the role of Vice Chair of the Committee as a whole. Prior to accepting the duties of an officer, he chaired several working groups and contributed for 10 years as the chair of the Insulation Life subcommittee. He holds a BSEE degree from Lafayette College in Easton PA. 

Robert M. Del Vecchio, PhD, Programmer, Research & Development — Responsible for developing computer models for simulating transformer behavior when subjected to electrical, thermal and mechanical stresses. Member of the American Physical Society, the IEEE Magnetics Society, and IEEE Power Engineering Society (PES).

Raj Ahuja, P.E., Vice President of Technology Development — Raj holds a BSEE (with Honors) from the University of Indore India as well as a California P.E. license. He has over 36 years of experience in the fields of design, development, manufacturing, quality assurance and testing of medium and large power transformers, including special purpose transformers, phase shifting transformers, traction transformers, furnace transformers and shunt/series reactors. He has also worked on prototype design for a 1 phase 765kV class 1950kV BIL auto-transformer. Raj is a co-author of Transformer Design Principles, published in 2000 and 2010. He is also an active member of IEEE and IEC Transformers Committees and holds the position of CIGRE A2 Committee National Member since 2012. Raj joined SPX in 1994 and has held positions of increasing responsibility throughout his employment.

Thomas M Golner, Sr. Materials Engineer — Author and creator of many novel concepts that are basis of numerous patented products utilized by SPX Waukesha and are offered to our industry. Strong background in chemistry and electrical engineering. Provides special insight into selection, utilization, development and specification of critical materials used for transformers.

Dharam Vir, Vice President of Engineering — Mr. Vir has served the transformer industry for 25 years in large power/EHV design, testing, production and plant operations. Since joining SPX in 2004 and prior to his current role, he has held positions as engineering manager at the Waukesha facility and director of the EHV program, leading the Waukesha facility expansion team. He is a member of the IEEE Transformers Committee and has been active in various working groups. Dharam holds a Bachelor of Science degree in Electrical Engineering from the University of Delhi in India as well as Master’s Degrees in Electrical Engineering from National Institute of Technology (NIT) Bhopal India and Finance and Marketing from Bhopal University. 

IEEE/PES Transformers Committee

SPX Waukesha actively participates in the IEEE/PES Transformers Committee, an industry group with the following scope:

  • Treatment of all matters in which the dominant factors are the application, design, construction, testing and operation of transformers, reactors and other similar equipment. Included is treatment of the following:

    • Transmission and Distribution Transformers
    • Voltage Regulators (step and induction regulators)
    • Reactors and Grounding Transformers
    • HVDC Converter Transformers and Smoothing Reactors
    • Power Semiconductor Rectifier Transformers
    • Instrument Transformers (voltage and current transformers)
    • Insulation and Dielectric Issues Relating to Transformers
    • Outdoor Apparatus Bushings
    • Insulating Fluids
    • Underground Transformers and Network Protectors
    • Phase Angle Regulating Transformers

  • Sponsorship and development (either alone or jointly with other technical committees and/or organizations) of standards, recommended practices, guidelines and policies as well as preparation of position papers and/or documents, technical conferences and/or sessions on matters related to items above.

  • Liaison and cooperation with other technical committees, societies, groups and associations concerned with various aspects of items above.

Meeting Document

IEEE - IEC Transformer Standards Comparison (.ppt)
Document was prepared by the Task Force under the Standards Subcommittee of the IEEE Transformers Committee
March 2011

Task Force Chair:

Raj Ahuja, P.E. Vice President of Technology Development — SPX Transformer Solutions, Inc.

SPX Waukesha Task Force Members: 
Vinay Mehrotra, Manager of Engineering
Ajith Varghese, Senior Electrical Design Engineer

SPX Waukesha is an IEEE Standards Association Advanced Corporate Member.

Engineering & Design Tool Advancements

SPX Waukesha engineers develop various analytical and design tools to continue manufacturing reliable products efficiently and economically. These tools are used for designing production units that are highly engineered and customized to meet specific requirements of the end user's power system:

  • Design Optimization programs
  • Finite Element Analysis (FEA) programs
  • Electromagnetic Analysis tools (for stray loss and mechanical force analyses)
  • Mechanical Stress Analysis
  • Heat Transfer Analysis
  • Statistical Process Development (Six Sigma)
  • Dielectric Stress Analysis


Patent Innovations

SPX Transformer Solutions is recognized for the development of cost effective solutions and innovative products that continue to meet the application and operational needs of its customers. Newly developed products are certified through extensive prototyping and testing before being released for production. Products built by SPX Waukesha manufacturing, whether in Goldsboro or Waukesha, undergo vigorous routine tests to ensure that SPX Waukesha quality, reliability and long service life are part of the package.

Examples of patented Waukesha® product innovations in production today:


DETC (De-Energized Tap Changer)

Patent No. 5,744,764

DETC Operation:
The electrical contacts of the fixed DETC contact blocks are connected to different taps of the transformer allowing the turns ratio to be adjusted to meet specific voltage requirements.

To make the appropriate connection between the fixed electrical contacts, each DETC has a cylindrical movable bridging bar that is mounted on a shaft and driven simultaneously through the hollow bores of the fixed contact blocks. The solid copper bridging bar has multiple contact bands for increased current carrying capacity and short circuit strength.

Each drive shaft is connected by a mechanism to a handle mounted outside the transformer tank. The handle can be manually operated to position the movable contacts a selected distance to change the tap connections to the transformer during “off-load” conditions.

For information regarding “on-load” tap changers to automatically compensate for demand load and supply voltage fluctuations, please review the section on our reliable and field-proven Waukesha® UZD-type LTC.

DETC -- De-Energized Tap Changer DETC
The patented Waukesha® Linear DETC (De-Energized Tap Changer) features a rugged, compact, non-metallic and modular switch design that allows greater flexibility of placement and increased short circuit withstand capability. It features an innovative rack and spur gear drive system that provides accurate alignment and positive tap change.

ARDB (Auto-Recharging Dehydrating Breather)

Patent No. 5,902,381

Patented Waukesha® Auto-Recharging Dehydrating Breathers are available in single small (5000 gal. capacity), single large (12,000 gal. capacity), dual large (24,000 gal. capacity) or any combination configuration of the two for new and retrofit applications. All ARDBs are manufactured and distributed by our components division.

ARDBs keep the air inside LTCs, conservators, sealed tanks and control cabinets dry, improving equipment reliability. The ARDB has an integrated heater that drives moisture out of the desiccant and is engineered to recharge automatically, eliminating the need for periodic maintenance of the desiccant.

PDFicon  ARDB Flyer (258k)

Dual Large ARDB

Oil Filtration System

Patent No. 6,062,821

Patented LTC Oil Filtration and Sampling System products are available for new and retrofit applications and are distributed by our components division.

For high volume LTC oil maintenance applications, a Retrofit-Plus Oil Filtration System is also available.

PDFicon Retrofit & Retrofit-Plus Oil Filtration Systems Flyer (463k)



Oil Filtration Oil Filtration 2

Nitrogen Generator System 

Patent No. 6,581,694

The patented Waukesha® Nitrogen Generator System provides a cost effective solution for transformer oil preservation and eliminates the need to replace nitrogen bottles. The unit supplies compressed nitrogen gas at only 125 psi (instead of the traditional 2,000 psi bottle pressure), which significantly reduces the possibility of system leaks. SPX Waukesha’s innovative Nitrogen Generator design uses state-of-the-art membrane separation technology — a concept proven over many years in other industry applications.

The Nitrogen Generator is available for new and retrofit applications and is manufactured and distributed by our components division.

PDFicon  Nitrogen Generator System Flyer (415k)


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Nitrogen Generator System



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