Permitted voltage systems

Information on voltage supply systems

Information on permissibility

TN and TT systems – voltage systems with directly grounded star point

Use is possible without restrictions.

IT systems – voltage systems with non-grounded star point

Use is only permitted with electronics cover in IT system design (...-513-....).

  • For use in IT systems, SEW-EURODRIVE recommends using insulation monitors with pulse-code measurement. Using such devices prevents false tripping of the insulation monitor due to the earth capacitance of the inverter.
  • The EMC limit values for interference emission are not specified in IT networks. The EMC limits for interference emission specified in the product manual, chapter "Technical data" do not apply to IT system designs.

Voltage networks with grounded
outer conductor

Use is prohibited.