Permitted voltage systems

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

Operation with an electronics cover of size 1 in IT system design is permitted (...-513-....)!

For devices with electronics cover of size 2, mount an insulating bushing according to chapter Installing the insulating bushing.

• 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 for IT systems. The EMC limits for interference emission specified in the product manual, chapter "Technical data" do not apply to IT system designs.

Voltage systems with grounded
outer conductor

Use is prohibited.