Electricity supply device

摘要

The apparatus has a switching apparatus (2) for selectively switching connection of an electrical load connection i.e. plug socket (D1), between electrical power supply connections configured for mains operation and island operation, respectively. An evaluation and control apparatus (AE1) is connected to the load connection, and identifies the island operation of the electrical power supply apparatus. The control apparatus switches the electrical load connection on or off during the island operation, in dependence on a preset criteria e.g. time period from the start of the island operation.