10/20kV Epoxy-Cast Potential Transformer (Power Source for Circuit Breaker Operation and Lighting)

Medium-Voltage Potential Transformers (10~25 kV)

EPF-20DZ

About the Product

Single-phase indoor-use potential transformer EPF-20DZ, intended for a 12 or 24 kV power system, is designed for the measuring and monitoring of the voltage signal.

Due to its continuous output capacity of 4000VA (max.), this potential transformer can be used in a small substation or a switchgear panel as a power source for circuit breaker operation and lighting equipment. This setup helps to conserve space and reduce cost.

In addition, the EPF-20DZ potential transformer can be connected to one or two smaller-capacity potential transformers to form a three-phase potential transformer (3ϕ PT). This can be done via a V-V or Y-Y connection.

Cast in self-extinguishing Araldite® epoxy resin, the EPF-20DZ potential transformer is characterized by superior insulation and excellent safety.

Product Features

  • Standard: IEC or IEEE*
  • System Voltage: 12 or 24 kV
  • Frequency: 50 / 60 Hz
  • Power source for circuit breaker operation and lighting
  • Option: Forming a three-phase PT through connection with one or two smaller-capacity potential transformers (via a V-V or Y-Y connection)
  • No risk of oil leakage
  • Self-extinguishing
  • Includes a fuse on the secondary side

Selection Table

Model

Primary
Voltage
(kV)
Secondary Voltage
(V)

Burden / Accuracy

AC / BIL
(kV)

Thermal Burden
(VA)

Creepage
(mm)

EPF-20DZ

22 or 11

110

500VA/1.0

50/125

4000

531

22

220-110**

4000-2000

 
* Other standards and specifications available.
** This specification comes with an added tap in the secondary winding so as to offer two voltage ratios (22-11 kV).