Transformer Manufacturing

The highest quality standards are built into every Waukesha® transformer, whether it is manufactured in Waukesha, Wisconsin, or Goldsboro, North Carolina. The company has earned ISO 9001:2015 certification and has a reputation among transformer manufacturers for quality and reliability that is the best in the transformer manufacturing industry. Complying with the Prolec GE Waukesha Quality Policy is the overriding objective and primary responsibility of every employee, meaning that every unit we build and deliver to our customers has been manufactured to provide consistent performance, dependability and long service life. With nearly 15,000 power transformers installed, the facts speak for themselves:

  • One of the lowest incidences of through-fault failure
  • Low maintenance due to advanced design
  • Long contact life LTCs
  • Certified accuracy of loss measurement
  • And many other benefits!
Additional Information


Core & Coil

Every Waukesha® transformer features core form construction with copper windings in a circular, concentric configuration and are continuous disc and/or helical in design.

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Vapor Phase

Designed to optimize heat transfer, insulation stress and time of transformer core and coil assembly moisture removal process.

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Tank Fabrication & Insulation

Tank integrity is essential for reliability & long transformer life.

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Insulating Fluids

Inhibited mineral oil is the insulating fluid of choice in most Waukesha® transformers.

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Final Assembly

This Is Where Everything Comes Together!

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Tap Changers

Waukesha® transformer designs can accommodate both DETCs and LTCs to meet customer specifications

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Highly trained factory experts using accurate state-of-the-art equipment test on all Waukesha® transformers prior to shipment in accordance with the latest ANSI, IEEE and/or NEMA standards.

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Waukesha® transformers are designed to accommodate a wide range of accessories to enhance safety, reduce maintenance, increase life/reliability and monitor transformer performance.

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Accurate, on-time and damage-free delivery of your transformers along with complete, professional installation expertise round out our design-to-delivery offering.

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SPX Manufacturing

Our primary responsibility is to safely provide outstanding products and services that exceed the expectations of our customers by continually improving our processes, performance and products.


Quality management comparison

Our corporate objective is Total Customer Satisfaction and we have structured our quality system so that all completed units meet individual customer specifications and industry standards. To deliver the consistent quality transformers and power equipment that our customers demand, both of our manufacturing operations have

  • Trained quality specialists and testers on all shifts
  • Several hundred test and measurement items on a rigorous calibration program
  • Online non-conformance system to resolve issues before a unit ships


Customer Requirements and Specifications
To be sure that our plant and facilities are prepared to meet customer specifications, a systematic review is performed to identify each condition of purchase, including special requirements. This allows ample time for preparation in the event that special test or inspection equipment is required.

Supplier Evaluation
Since purchased items and raw materials must meet design requirements and specifications, our Quality and Global Sourcing Groups work as a team to select only those suppliers capable of delivering materials and products that consistently meet Prolec GE Waukesha quality, manufacturing and technical demands. Performance requirements are defined and documented for applicable material specifications, engineering instructions and standards data. Our measurement and corrective action systems are functioning to continually improve the quality of supplier products and services.

Receiving Inspection
Once suppliers have been selected, all incoming production materials are subjected to receiving verification. Material not consistent with expectations and specifications is segmented and prevented from use in our manufacturing facilities. A documentation system provides a history of part characteristics and supplier performance.

Manufacturing and Assembly Operations
To confirm that all components and subassemblies manufactured at Prolec GE Waukesha meet design specifications, a documented system of inspection of critical dimensions and attributes takes place at the point where each component is manufactured. This prevents nonconforming components from entering the main transformer assembly bay or supporting assembly operation. The inspection system provides for the identification, segregation and disposition of all nonconforming parts and/or assemblies.

Engineering Change Requirements
When changes are made, the Quality team is continually provided with up-to-date computerized Engineering Change Notices to be sure that all components and assemblies are manufactured with the most current engineering information.

Test Facility
Waukesha® transformers must pass an extensive series of standard inspections and electrical tests, including impulse and Corona tests — conducted according to IEEE and other standards. Additional information can be found in our Transformer Testing section.

Pre-Shipping Inspection
Prior to release by manufacturing of a completed transformer, a thorough inspection is made. Specific shipping details requested by the customer are checked,along with essential transportation and vehicle requirements. Working together with the customer, our Quality, Manufacturing and Engineered Shipping groups work as a team to provide accurate, on-time and damage-free delivery of each Waukesha® transformer.