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
  • Specification and Bid Support
  • Design Review

factory audits

  • Vendor QA/QC Verification
  • Workforce Management
  • Core and Coil Manufacturing
  • Core and Coil Assembly
  • Final Assembly and Oil Filling
  • Testing and Shipping

Testing expertise

  • Witness Factory Acceptance Testing (FAT)
  • Field Testing Witness
  • Test Results Review and Analysis – Factory & Field
  • Test Laboratory Support
  • Oil Sample Analysis

Pre-Tanking Inspections

  • Inspection of the completed active part after drying to verify winding compression, exposure time, hang test, internal clearances, spacer alignment, ratio test and oil duct cleanliness. This is the last available inspection of the active part prior to putting the unit into the tank.

FAT Witness

  • Provide expert witness of factory acceptance testing to ensure that the unit meets all required 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 that may need to be performed to meet the customer expectation for quality of the unit.

Transformer Manufacturing

  • Core and Coil Assembly Assessment
  • Pre-Tanking Inspections
  • Manufacturing Process Witness

Failure Analysis

  • Factory Test Failure Analysis
  • Field Failure Analysis
  • Teardown Witness
  • Root Cause Analysis

Project Management

  • Contractor Qualification
  • Quotation Bid Support
  • Project Setup and Execution
  • Crane and Rigging 

Engineering

  • Transformer Condition Assessment
  • Fleet Assessments
  • Condition Monitoring
  • Alternative Fluids