Single-Pole Potential Transformers (or Three-Phase PT + GPT)

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Single-Pole Potential Transformers (or Three-Phase PT + GPT) - CIC

CIC | CHALLENGE INDUSTRIAL CO., LTD., since 1974, is a global supplier of Single-Pole Potential Transformers (or Three-Phase PT + GPT). CIC specializes in the manufacture of instrument transformers, distribution transformers, detuned reactors, epoxy insulators, electronic energy meters, etc. Also provided or distributed are a wide range of other electrical or electronic apparatus.

Certified to ISO 9001, CIC ensures superior quality of its goods through such advanced technologies and materials as Swiss-manufactured equipment (for the production of resin insulators), Araldite® epoxy resin, and technology transferred from Messwandler-Bau (MWB) of Germany.

Backed by 44 years of experience, CIC offers custom-made products, OEM/ODM services, and technical support tailored to the needs of its discerning clientele.


Single-Pole Potential Transformers (or Three-Phase PT + GPT)

1-pole potential transformers for 12/24/36 kV power systems. Use with measuring or monitoring instruments, or with protective relays. Optional connector and epoxy housing with a built-in primary fuse. Insulated with Araldite® epoxy resin.

MV Indoor Epoxy-Cast Potential Transformers

About the Product

Cast in Araldite® epoxy resin and designed for 12/24/36 kV power systems, these single-pole potential transformers are self-extinguishing and are characterized by their superior insulation and excellent moisture resistance. These PTs can be used with measuring or monitoring instruments for power system analysis and monitoring; alternatively, they can be paired with protective relays to maintain system safety during power supply.

For models EPF-20SL and EPF-30DE, optional accessories are offered, which include an elbow-type connector (for the primary side) and a tubular epoxy housing, which contains a built-in primary fuse. The tubular epoxy housing may be attached to the PT through the elbow-type connector. This option helps to enhance safety of operation, allow easier repair, and reduce the size of the switchgear panel.

Model EPF-20SL provides a rated thermal burden of 1000VA (maximum) and can be used as a power source for circuit breaker operation.

Product Features and Selection Table
  • Indoor usage; cast in Araldite® epoxy resin for superior insulation
  • Standard: IEC or IEEE*
  • Frequency: 50/60 Hz
  • EPF-20SL and EPF-30DE only:  (Option) Elbow-type connector and tubular epoxy housing with a built-in primary fuse
  • GPT Functionality:  Connect three potential transformers from this series through a Y-Y-open△ connection for the combined functionality of a three-phase PT and a grounding potential transformer (3ϕ PT + GPT).

Single-Pole Potential Transformers (or Three-Phase PT + GPT)

Single-Pole Potential Transformers (or Three-Phase PT + GPT) - Selection Table

*Other Standards or specifications available.   
**This model can be used as a circuit breaker operation power source due to its rated thermal burden of 1000VA (max.).

Available Models

EPF-10CE, EPF-10DE, EPF-20SK, EPF-20SL, EPF-20SL with Fuse, EPF-30DE, EPF-30DE with Fuse




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