• Installation, Removal and Relocation
  • Testing (Including standard and diagnostic testing)
  • Repair and Preventive Maintenance
  • LTC Maintenance
  • Mobile Repair
  • Oil Processing (Dehumidify & Degas)
  • Regasketing
  • Control Cabinet Upgrades
  • And much more!


Our trained employees offer over 300 years combined experience in the field providing quality support to help significantly lengthen the operational life of your transformer. They receive extensive technical and safety training and are outfitted with proper Personal Protective Equipment (PPE) and are trained in accordance to OSHA requirements. This experience, plus quality equipment and up-to-date training, enables our technicians to install more than 100 transformers a year.


Delta Star uses professionally maintained and calibrated equipment for every step of the process. From installation to oil processing to testing, we use the latest technology. This allows us to perform field service to the highest standard.

  • 30 – 50 GPM Oil Processing Trailers
  • Full Degassing Capabilities
  • Emissions Compliant Generator On Board
  • Continuous Dry Air System
  • Dew Point Monitoring


Our professional technicians use the latest technology in test sets to ensure high levels of accuracy and repeat-ability. Field testing capabilities include:

  • Power Factor Bushings
  • Power Factor Transformer
  • 10 kV Excitation
  • Megger Winding and Core Ground
  • Functional Testing of Protection and Control Circuits
  • And much more!

In addition to standard testing, Delta Star offers advanced testing and diagnostics including: Sweep Frequency Response Analysis (SFRA), CT’s (Ratio, Resistance, Saturation Curves), Winding Resistance, Ultrasonic Leak Detection, Leakage Reactance, Thermal Imaging, Dewpoint, Dielectric Frequency Response, and Oil Testing.


Delta Star provides logistical service and support to transport, relocate, and install transformers. Electronic Impact Recorders with GPS and automated notification of events are used to track transformers during shipments and ensure that your transformer arrives protected and on time. We at Delta Star have extensive experience with railcar, truck, and shipments.