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


The energy backup of the ES258 series is a supplementary device for the undervoltage/overvoltage relay VMD258. It provides the electronics of the connected VMD258 with the necessary energy, to cover the duration of the maximum response time after power supply failure.


  • Supplementary device for the undervoltage/overvoltage relay VMD258

Downloads for LINETRAXX® ES258

Manuals ES258 471.6 KB DE13.05.2019 10:31:41D00086
Manuals ES258 471.6 KB EN13.05.2019 10:31:41D00086
Datasheets ES258 134.6 KB ZH13.05.2019 10:31:33D00086

LINETRAXX® ES258 Variants

TypeArt. No.