Complete Regulator Service and Repair

Regulator Services

  • Repair
  • Recondition
  • Redesign
  • IEEE/ANSI testing and design standards
  • Cooper Authorized Service center
  • Units are refilled with FR3 fluid and mineral oil
  • New copper windings
  • Core/coil go through a dehydration process for moisture reduction
  • All new gaskets
  • Thorough inspection of tap changer mechanism
  • Control repair available
  • CRA upgrade kit available
  • Doble testing available
  • PT rewind available
  • Mail coil rewinds
  • VPI technology


  • Transformer Turns Ratio (TTR)
  • Insulation resistance
  • Applied potential (hi-pot)
  • Induced potential (double induced)
  • Load, no-load test
  • Tested at full rated voltage through all 32 steps
  • Doble tested (power factor, excitation current)

Copies of test results, quality assurance sheet and inspection reports are shipped with the newly repaired unit