Transformer Consulting Services

  • D4 provides a variety of quality assurance services to help ensure that your power transformer project is a success. 
  • Whether you are an electrical utility, an industrial company, a power project developer, an EPC firm, or an owner’s engineer — we have you covered. 
  • Our people have decades of experience working with companies in your market sector.
  • At D4, we understand that each client has its own specific needs. Therefore, we are able and willing to adjust the depth and scope of our services to fit your needs and budget.

our services

Transformer Purchasing Assistance

  • Vendor Qualification Assistance
  • Specification and Bid Support Assistance
  • Design Review Assistance

Testing expertise

  • Witness Factory Acceptance Testing (FAT)
  • Field Testing Witness
  • Test Results Review – Factory & Field

Pre-Tanking Inspections

  • Inspection of the completed active part after drying to verify the following
    • Winding compression
    • Exposure time
    • Hang test
    • Internal clearances
    • Spacer alignment
    • Ratio test
    • Oil duct cleanliness

FAT Witness

  • Provide witness of factory acceptance testing to ensure that the unit meets all IEEE standards as well as customer specifications.
  • Provide a report of activities that includes the test results of the witnessed tests, comments on the testing activities, report any deficiencies, document any additional testing needed.

Transformer Manufacturing

  • Core and Coil Assembly Assistance
  • Pre-Tanking Inspection Assistance
  • Manufacturing Process Witness Assistance