High impedance relay
The 7PG23 electro-mechanical single phase circulating current protection is used to detect earth faults in ‘high impedance’ protection schemes. The relay is typically applied used in transformer protection schemes.
![High impedance relay – Reyrolle 7PG23 High impedance relay – Reyrolle 7PG23](https://assets.new.siemens.com/siemens/assets/api/uuid:672ee52e-ecb2-4ee1-9091-a3bda49b3d47/width:100/quality:low/High-impedance-relay-Reyrolle-7PG23.png)
The 7PG23 electro-mechanical single phase circulating current protection is used to detect earth faults in ‘high impedance’ protection schemes. The relay is typically applied used in transformer protection schemes.