30kV Multi-Ratio Current Transformers (Indoor Use)

Medium-Voltage Current Transformers (30~36 kV)


About the Product

The EWF-30D Series multi-ratio current transformers are insulated with Araldite® epoxy resin and are available in two-core and three-core options. Suited to 36kV (max.) power systems, these current transformers are intended to operate in conjuction with measuring or monitoring instruments, or with protective relays. Fully compliant with the regulations for 36kV products according to IEEE or IEC Standards, these products are characterized by excellent moisture resistance, superior insulation, and high mechanical strength.





  • Standards: IEC or IEEE*
  • Indoor usage; epoxy-cast type
  • System Voltage: ≤ 36 kV
  • Frequency: 50/60 Hz
  • AC/BIL: 70/170 kV


Selection Table

30kV Multi-Ratio Current Transformers (Indoor Use)



30kV Multi-Ratio Current Transformers (Indoor Use), EWF-30 Series

Easy-to-print document, containing product description, specifications, and a selection table.

CT & PT Selection Guide: How to Choose a Current Transformer or Potential Transformer

How to select, based on application and power system attributes, the primary and secondary currents, burden, accuracy, rated frequency, type (indoor vs. outdoor), insulation material, etc.