Single-Pole Potential Transformers (or Three-Phase PT + GPT)
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).
*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.).
EPF-10CE, EPF-10DE, EPF-20SK, EPF-20SL, EPF-20SL with Fuse, EPF-30DE, EPF-30DE with Fuse
- Related Products
1-phase potential transformer for the measuring and monitoring of the voltage signal. Max continuous output: 4000VA. Combination with 1 or 2 smaller-capacity potential transformers forms a 3-phase potential transformer. Cast in self-extinguishing Araldite® epoxy resin.
Indoor grounding potential transformer with a fuse on each of the 3 phases on the primary side. Used with measuring or monitoring instruments, or for ground-fault protection. 5-legged laminated core. Coils insulated with Araldite® epoxy resin.
Intended for the switchgear panels of a 36kV power system, this single-pole epoxy-cast potential transformer for indoor application is covered with an aluminum box. The grounded aluminum box for shielding reduces the installation space requirement.
- Download Materials
Easy-to-print document, containing product description, features, and a selection table.
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.