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 12 kV

The AGH676S-4 is used for coupling the ISOMETER® IR420-D64 to 12 kV-AC systems in offline mode.

Alternatively, the AGH676S-4 can be used in combination with iso685… for 12-kV-AC systems in online mode.

The coupling device must only be used in combination with the ISOMETER®. All device combinations listed above are not suitable for systems containing converters.



Downloads for AGH676S-4

Handbücher AGH676S-4 1.6 MB DE09.06.2022 10:45:52D00096
Handbücher AGH676S-4 1.6 MB EN09.06.2022 10:45:52D00096
Datenblätter AGH676S-4 250.5 KB ZH13.05.2019 10:31:32D00096
Datenblätter AGH676S-4 293.1 KB DE10.09.2019 10:16:13D00096
Datenblätter AGH676S-4 250.5 KB EN10.09.2019 10:16:28D00096
Datenblätter AGH676S-4 254.2 KB ES10.09.2019 10:16:44D00096

Optional accessories for AGH676S-4

AGH676S-4 Variants

TypeNominal system voltage UnCable lengthArt. No.
AGH676S-4AC, 3(N)AC 0…12 kV, 50…460 Hz2000 mmB913055