High Voltage Services

Transformers

RANS High Voltage Electricians can service and cater for all your transformer needs, including transformer testing, transformer installation, transformer commissioning and transformer maintenance. Below are some of the specific services and testing we provide.

Current Transformers (CT)

  • Ratio, burden and polarity
  • Phase and magnitude error
  • Excitation curve
  • Winding resistance
  • Secondary burden
  • Dielectric withstand voltage (2 kV AC)
  • CT circuit continuity

Voltage Transformers (VT)

  • Ratio, burden and polarity
  • Phase and magnitude error
  • Excitation curve
  • Winding resistance
  • Secondary burden
  • Dielectric withstand voltage (2 kV AC)
  • VT circuit continuity

Transformers

  • Ratio
  • Winding resistance
  • Tap changer test
  • Excitation current
  • Short circuit impedance
  • Partial Discharge testing (PD)
  • Tan Delta Testing (TD)

Oil Testing

  • Dissolved Gas Analysis
  • Oil Screen Chemical
  • Oil Screen Electrical Dielectric Strength
  • Furans, Phenols, Cresols and Passivator
  • Particle Profile
  • Dew Point
  • Polychlorinated bipenpenyls (PCB)

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