Potential Transformer for SF6 Gas-Insulated MOF Panel

Medium-Voltage Potential Transformers (10~25 kV)


About the Product

Intended for power companies, the EPF-20SH single-phase potential transformer is designed to be mounted inside the SF6 gas-insulated MOF (Metering Outfit) panel of a 25.5kV (max.) power system. With an added tap in the secondary winding, this PT can offer two voltage ratios (120/60:1) and allows easy switching between the two, while maintaining the accuracy and burden rating of 0.3Y at each voltage ratio. Insulated with Araldite® epoxy resin, this indoor potential transformer offers excellent electrical performance and high reliability.


  • Indoor usage; epoxy cast (epoxy resin)
  • Standard: IEEE
  • System Voltage: 25.5 kV or below
  • Frequency: 50 / 60 Hz
  • Intended for a SF6 gas-insulated MOF panel
  • Nominal Voltage Ratio: 120/60:1 (two voltage ratios)
  • Accuracy and Burden: 0.3Y
  • Approximate Weight: 57 kg

Selection Table


Primary Voltage

Secondary Voltage

Accuracy / Burden



23.90/√3 kV  /  11.95/√3 kV


0.3Y / 0.3Y

50/125 kV