BACKUP POWER SYSTEM AND GROUNDING DEVICE FOR A BACKUP POWER SYSTEM

摘要

The invention relates to a grounding device for a backup power system for connecting a neutral conductor (N40) of a load arrangement (40) to a local ground connector (21) when the load arrangement (40) is isolated from an energy supply grid (10). The grounding device is characterized by the fact that the neutral conductor (N40) of the load arrangement (40) is connected to a neutral conductor (N50) of a local energy supply device (50) via a series circuit comprising two switches (1 2) wherein a center tap (3) between the two switches (1 2) is connected to the local grounding connection (21).