12 kV Two-Core Current Transformers
EWF-10D Series
2-core current transformers designed for 12 kV (max.) power systems for use with measuring (or monitoring) instruments and protective relays, these products are cast in Araldite® epoxy and meet the requirements of all major electrical standards.
About the Product
The EWF-10D Series two-core current transformers are designed for 12 kV (max.) power systems and intended to be used with measuring (or monitoring) instruments and protective relays. Insulated with Araldite® epoxy resin, these current transformers meet the requirements of all major electrical standards. In addition to superior insulation, these products are also characterized by high mechanical properties and excellent resistance against moisture.
Product Features
- Indoor application
- Cast in Araldite® epoxy resin
- Standards: IEC or IEEE
- System Voltage: ≦12kV
- Frequency: 50 or 60 Hz
- AC/BIL: 28/75 kV
Selection Table
Note: Other standards and specifications available upon request.
Available Models
EWF-10DA, EWF-10DB
- Download Documents
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CIC Company Profile
Learn about our company: history, strengths, products, global locations, and our Advanced Electricity Lab.
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【Product Brochure】12 kV Two-Core Current Transformers (EWF-10D Series)
Easy-to-print document, containing product description, specifications, and a selection table.
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【Product Dimensions】12 kV Two-Core Current Transformers (EWF-10D Series)
Download PDF for basic drawing(s) and dimensions of this product. For more detailed information, please contact CIC.
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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.
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Overvoltage Protector for Current-Transformer Protection
CCTP-03
When a power system is in operation, it is imperative that the secondary of the current transformer(s) should not have an open circuit. When an open circuit occurs, an extremely high transient voltage will be induced, which can in turn damage the current transformers and the instruments at the secondary, or even posing a threat to personal safety. This CT secondary overvoltage protector offers protection from such accidental damage caused by secondary transient voltage.
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18Jul 2025 CIC Instrument Transformers Win “Best Product” at Taiwan’s 22nd National Brand Yushan Award
Challenge Industrial Co., Ltd. (CIC), a Taiwan-based manufacturer with over 50 years of experience in the development and production of electrical and electronic equipment, has been honored in the “Best Product” category at the 22nd National Brand Yushan Award. The recognition highlights CIC’s high-quality instrument transformers, designed for power system measurement and protection.
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