Fronius International Gmbh

Christoph Wolf

Harald Josef Kreuzer

Hannes Heigl

Christian Angerer

The invention relates to a method for recognizing the operational state of a load () connected to the output () of an island inverter (). A load recognition signal (S) is applied at specific moments in time to the output () of the island inverter (), during which specific electric parameters are measured on the island inverter (), enabling the operational state of the load () to be determined, wherein the island inverter (), when the load () is activated, is switched from a possible standby mode into a permanent operation mode and, when the load is deactivated (), the island inverter is switched from a possible permanent operation mode to a standby mode. The invention also relates to an island inverter (). In order to ensure reliable recognition of all possible collected loads (), a load recognition signal (S) with parameters (T, d, A, H, f) that are modified at least according to the type of load () is applied to the output () of the island inverter ().

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Linz, Austria

Christoph Wolf