Permitted grid configurations

The inverter approved for operation in the following utility grids:

• TN-C

• TN-S

• TN-C-S

• TT¹⁾

Operation of the inverter in IT or Delta IT grids is not permitted.

Overview of approved grid configurations

¹⁾ It must be ensured that the local grounding has a sufficiently low-impedance connection to the grounding of the transformer, otherwise operational leakage currents can lead to potential differences. For error-free operation, the ground potential at the neutral point of the transformer must be the same as that of the grounding conductor connection on the inverter. Improper implementation of the transformer/grid connection with regard to low-impedance grounding of the neutral point can lead to a device defect that is not covered by the warranty.