Innovative technologies for safe handling of electrical power to achieve high availability

We offer you first-class quality and safety combined with global service and every support in resolving your monitoring problems.

  • Electrical safety for unearthed power supplies (IT systems)
  • Insulation monitoring equipment, insulation fault location systems
  • Power supplies for medical applications
  • Measuring and monitoring relays
  • Electrical safety for earthed power supplies (TN systems)
  • Using renewable energies efficiently: wind power, photovoltaics
  • Test systems for electrical equipment and medical technology


  • Increase of the ISOMETER® nominal voltage range
  • Used with ISOMETER® of the iso685 series
  • For medium-voltage applications up to AC 7.2 kV

The coupling device AGH520S is designed to extend the nominal voltage range of the ISOMETER® iso685 series to (3)AC 0…7200 V, 50…400 Hz. The coupling device is connected to the system to be monitored by one pole and connected to the terminal AK of the ISOMETER® by means of the terminal 5.



Downloads for AGH520S

Handbücher AGH520S 802.9 KB DE13.05.2019 10:31:40D00073
Handbücher AGH520S 802.9 KB EN13.05.2019 10:31:40D00073
Handbücher AGH520S 104.7 KB FR13.05.2019 10:31:54D00073
Datenblätter AGH520S 178.3 KB ZH13.05.2019 10:31:32D00073
Datenblätter AGH520S 282.4 KB DE10.09.2019 10:16:11D00073
Datenblätter AGH520S 280.2 KB EN10.09.2019 10:16:27D00073
Datenblätter AGH520S 241.2 KB ES10.09.2019 10:16:43D00073

Optional accessories for AGH520S

AGH520S Variants

TypeNominal system voltage UnArt. No.
AGH520S3(N)AC 0…7200 VB913033